CA2179184C - Whipstock apparatus and methods of use - Google Patents

Abstract

An oil field Whip-Anchor System, for deviating a wellbore, which uses an improved whipstock (1) incorporating a new setting apparatus and method, attached to a mechanical (14M) or hydraulic anchor packer is disclosed. The complete Whip-Anchor System also includes an apparatus and method for retrieving the Whip-Anchor if it is used in wellbores which require retrievable wellbore deviation tools. The new apparatus reduces the number of whipstock bodies that must be warehoused to three fundamental types which fit all commonly used wellbores. The apparatus permits the proper "set" of a mechanical packer without fear of shearing the releasable attachment device currently used in the industry and permits an operator to "bottom hole wash" while setting a mechanical packer in a wellbore. The same apparatus and similar techniques are used for both mechanical or hydraulic packers. The system utilizes a slot cut in the face (11) of the whipstock for setting (13) and retrieval (12). Other improvements include a pinned spring loaded hinge assembly (6) which assures that the tip of the whipstock will fall against the wellbore, a deflector plate (7) that uses a surface hardening or polycrystalline diamond inserts to reduce wear on the top portion of the device during the window milling operation. Also disclosed are additional downhole tools for use with the Whip-Anchor System.

Description

-WO 951_3273 2 t 7 q ~ 8 4 11 ~ IA77 j~
Whipstocf~ Apparatus and Methods of Use Tecl~nical Fjeld - - -Tlle presellt invelltiol~ lelates to oil all~l gas dlillil~g eqllipment and mole~iri-,..lly relates to an appalatlls all(i Illetllo~i fol dlillil~g devialed lloles flolll a existillg wellbole.
s BackrA,ro~ln~l Alt At tillles it is desilable to sidetlack (deviate) existingwellboles fol variolls reasons in prodllcing a more economical welll~ole. It is well known ill tlle oil and gas ill~lllstly tllat whipstocks ale llsed il~ drillillg to (lilect ol (leviate a ~lli11 I)it ol cll~el at an allgle o flom a wellbole. Tlle wellbole call l~e case(l (lille(l witll pipe) ol Illlcase(l (ope~ ole;
not lil~ed witll pipe). It llas l~eell cllstolllaly to follow plllg alld aball(lonment (P~A) procedllles wllell llsillg a wllipstock. Tllese P~A plocedllles valy as to cased ol uncased wellboles. Most P~:A ploce(lllles follow OCS glli(lelines as tlle operatol does llot wallt m~ r:lfjoll between tlle "old" wellbole all(l tlle "llew" bole. OCS gllidelines wollld ~s llotbefollowedwlleletlleopelatolisdlillillga(l(litiollal"(Iraill"lolesillal~existillgwell.
For tlle cased wellbole, tlle opelatol will set a celllent plllg in tlle wellbole, abollt 30 metels ~100'1 tllick at a lllillillllllll, followe(l l~y a blidge l~lllg or EZ-dlill plllg. Tlle blidge plllg is a wire lille device Wllicll is set 0.9 metels 13'] to 1.5 metels 15'1 above tl~e casing collal (or joillt) lleal tlle le(llliled poillt tllat deviatioll of tlle welll~ole is lleeded.
20 Tile positioll of tlle blidge plllg alld tlle wllipstock is clitical becallse tlle deviated llole must NOT pelletlate tlle casillg at ol Ileal a casillg collar (ol joint). Tile wllipstock is traditiollally set abollt olle Illetel 13'1 al~ove tlle bli(~ge plllg. Gleat cale is exelcised to coordillate wile lille all(l l~ e Illeaslllelllellts to assllle tllat tlle ~vllipstock is clear of tlle casing collar (or jOillt). 11l all Illlcase(l llole, ollly a cemellt plllg of tlle ploper lellgth is zs llsed. Tlle lellgtll of tlle l)lllg is (ietellllille(l I~y tlle (leptll of tlle Illlcased llole to tlle poillt at wllicll tlle (leviatioll is le(lllilc(l. Tlle (io\vllllole tool is tla(litiollally set above tlle cemetlt plllg.
Tlle collll~lete (lowllllole asselllbly gellelally collsists of tlle wllipstock assembly attaclled to sollle forlll of pacAel asse~ ly. Tllele ale pleselltly tv~o con~elltiollal 30 wllipstock tyl~es availal le, tlle "PAcl~stocA" all(i tlle "Bottolll Tlip". Tlle Packstock is a w0 9s~23273 2 1 7 ~ ~ 8 ~ c t whipstock and a packer assemhly that is combille(l to form a single dowllhole llnit Tlle bottom tlil~ device is a single wllipstock witl~ a l)l~ gel stickillg o~lt of tl~e bottol~ of tlle downl~ole tool whicl~ whel~ set ~low~ ol- tlle boltoll- of tl~e l~ole will release a sl~ g loaded slip or wedge witl~ tl~e w~ipsto~k wllicl~ ill tllr~ olds tlle tool in place Tlle 5 wl~ipstock is tl~e actllal oil-tool tl~at callses tlle ~llill bit ol cllttel to deviate flom tlle wellbore Tlle packer is anotllel oil-tool tl~at l~ol~ls the wl~ipstock in place ol~ce tl~e wl~ipstock l~as beel~ set il~ tl~e wellbole at tlle ~lesiled oliel~tatiol~ Tl~is packer is given the name al~cl~or packer and it is tl~is packer tllat lests above tl~e bridge plllg in a cased hole an~l above tlle cel~lent plllg ill an llncase~l llole 11l tlle case of tlle bottolll trip o wllipstock it is tlle blidge plllg tl~at folces tl~e pllll~gel to lelease tlle spril~g loaded slips or we~lges tl~lls hol~lillg tlle tool ill l~lace It sllollld be appalent tl~at tllele ale two f~ t ll tyl-es of packel ill llse: tlle filst ol~elates ili a cased llole al~d tl~e second operates il~ al~ cased l~ole Tlle botton~ tlip ~levice operates only in a cased l~ole; it is al~ old device; and it is frallgllt wi~ll plol~lel~s beca~lse it llas ol~ly a sil-gle slip o wedge wl~icl~ cal~ wolk loose Tl~e wllipstock is a tlial~glllally sllal~e(l tool abollt 3 l~leters 110 ~ to 3 7 meters lollg It is sligl~tly less tlle,l Ille ~lialllctel of tlle welll~ole at its bottolll alld slopes so tllat its ~liallletel al)ploaclles illfillitely at its tol~ Tlle back of tlle tool llsllally lests agai~st tlle low side of tlle welll~ole ~llele tlle low si~le of tl~e weilbole is ~lefined as tllat ~o side of tlle l~ole n~ost affecte~ y glavity Tlle tool face is cllp-sllaped alld gllides tlle hole drillillg eqlliplllellt off to tlle side of tlle l~ole il~ tlle direction set by tlle olientatio of tl~e tool fa~e Tl~e bottoll~ of tlle tool is attacl~e~l to tl~e packe Tla~litiollally tl~e wl~ stock m-lst be cllosell fol eacll wellbole so tllat its botto dianleter Illatcl~es tlle wellbole all~l tlle l~acliel if llse~l Its top el~d ll~llSt l~atcl~ tlle ~5 inside dial~letel of tl~e wellbole so tl~at tlle ~Ilillil~g eqllil~mel~t sees a sn~ootl~ tral~sitio off to tl~e si~le of tl~e l~ole; al~l tlle lla~k of tl~e tool sllollld Illatcll tlle illterllal dial~letel of tl~e welll~ore Il~ additiol~ tl~e c~lpl)e~l face of tlle tool l~as beel~ cl~osen to n~atcl~ tlle bore size il~ o~der to plol~elly glli~le tlle drillil~g eqllipl-~ent Tl~is means tl~at tlle oil or gas field opelatol I--llst keep a stock of ~liffelellt wllil~stocks to ll~atcll tlle valiolls 30 standa~l welll~oles llsed il~ tlle il~lllstl~ Welll~ole stal~da~ls ale tra~litiol~ally givel~ i tl~e Blitisll ol US systel~l of III~its Al~ploxil~late col~velsiolls to l~et~ic III~its ale llse~l tl~rollgl~ollt Illis ~lisclosllle witll tlle ill~l~lstly stall~lald folll~ sq~lale blackets., Tl~is illvel-tiol- stal~lal~ es tlle wllil~stock tool to tl~lee valieties to fit l~ole sizes w09s/23273 2 1 7q 1 8 ~ P~

fi-on~ 9.53 centimetels ~33/4~] llp to 3] .75 celltillleters l121/2~l. Tlle illvenlion proposes one style of wllipstock fol use wi~ otll l~lecllal~ically set packers and llydralllically set packers. And finally, tlle illvelltioll i)loposes all apparat~ls an~l metllod for retrieval of tlle valllable alld expellsive dowllllole asselllbly ahe 1 tlle deviate~l llole is completed. This 5 Ietl'ieVable WllipstOCk WOIII~l be illval-lable ill mllltil~le dlaill lloles ill a sillgle wellbore alld wollld be llsed ill botll cased all~l opell llole (Illlcase~l) Coll~litiolls.
Tlle wllipstock llas passe~l tlllollgll two gelleratiolls of tool sillce its illtlodllctioll in tlle eally llineteen-tllilties. Tlle illitial appalatlls aDd metllod of llse involved a Illlllti-step plocedllre. Standard P&A ploce~lllles wele followed pliol to tlle llse of tlle tool;
o i.e, tlle wellbole was propelly plllgged below tl1e desired deviation poillt. An ancllol packer was tllell set ill tlle llole ill ol~lel to slll-polt all~l mailltaill tl~e olielltatioll of tlle wllipstock. Tlle packer lla~l a key slot ill its l~ottolll wllich wollld nlate witll a "stillgel"
on tlle wllipstock. Wilelille tools wolll~ e 1llll illtO tlle llole to determille tlle olielltation of tlle key slot all~l tlle stillgel oll tlle wllipstock wollld be adjllsted to matcl 15 tlle packel key slot so tllat wllel~ tlle ~vllil~stock was 1llll illto tlle llole, tlle wllipstock wollld orielltate itself in tlle colrect dilectioll. Tllis plocedllle le~llliled mllltiple lllns into and ollt of tlle wellbore all~l was flallgllt witll lisk. Aftel the wllipstock was ''set", a staltillg mill tool wollld be 1llll illtO tlle welll~ole to lelllove attaclllllellt poillts oll tlle face of tlle wllipstock, cllt illto tlle si~le of a cased llole, alld gellelally prepare tlle 20 wellbole fol a deviate~l llole. Tlle staltillg Illill tool is llsed fol about the filst one-llalf meter [20"] of llole. Tllese sallle ploce~ les ale followed ill tlle next gelleratioll tool alld will be explained latel.
The next generation (second), ~vllicll is tlle plesently llsed tecillliqlle~ mated tlle wllipstock to tlle allcllor packel. Tlle colllbillatioll of tlle wllipstock alld tlle allcllol 25 packer is attaclled to tlle drill stelll llsillg a slleal llill wllich in tlll ll is attached to a raised face ~t:~c~ t l~oillt, kllowll as tlle slleal pill l~lock, mollllte~l oll tlle face of tlle wllipsto~k. Tlle ~lowllllole assellll)ly is lo~vele~l illlo tlle welll~ole llntil it tollclles bottolll.
(Bottolll wolll~l be defille~l as tlle bli~lge l~lllg ill a cased llole alld tlle cemellt plug ill all Illlcased llole.) Tlle asselllbly is tllell l~ise~l sliglltly all~l tlle olielltatioll of tlle wllil~stock 30 is cllecked llsillg wilelille tools. Tlle ~llill stelll is rotate~l olle way ol allotllel alld t11e '' orientatiol~ is cllecked agaill. Tllis l~loce~ le is colltilllled Illltil tlle face of tlle wllil~stock is plopelly olielltate~l. Tlle allcllol l~ackel is tllell ''set" ill tlle wellbole.
Tllele ale two tyl~es of pacl~el, Ille~llallical set all(l llydralllic set. Tlle Illost w09s/23273 2 1 7 9 1 8 4 .~ c~c.~
common~y llsed packel is the l~ydlalllically set l~acker. U.S. Patent 5,193,6~0 (Braddick) discloses a wllipstock setting al~pal atlls al~cl ll~etllod fol a Illecl~allical packer. Mecllal~ical packers ale "set" by applying weigl~t to tl~e packel wl~icll, in tlll n, callses tlle packel slips to extend against the we~lbore, tlllls lockil~g (ol setting) tlle packer il~ place. Tllis is s similal- to tlle bottonl set wllipstock device il~ tllat tllele is a plllllgel extending floln tlle bottom of tlle packer; llowever, sl~lillg loade~l slil~s are l~ot llsed as ill tlle bottolll set whipstock. Olle otllel diffelellce, tlle l~ottoll~ set wllil~stock will llot llave aily packillg o resiliellt matelial tllat expands agail~st tlle llole to seal tlle lower hole sectioll.
U.S. Patent 4,397,355 (McLal~lole) cliscloses a wllipstock settillg metllod and o apparatus for a l~ydraulic packel. ~-iydlalllic pat~kels are "set'' by applyillg hydralllic pressl~re to tlle packel w~licl~, in tl~, callses tl~e l~ackel slips to extelld agaillst tlle wellbole, tll~ls lockillg (ol settillg) tlle l~ackel ill l-lace. Tlle lly~llalllic plessllle is obtained tllrollgll a ~levice calle~l a "Illlll~illg tool". Tlle lllllllillg tool collvelts tlle dlill stem mlld plessure to llydlalllic plessllle: the l~y~llalllic oil beil~g 1llll flom tlle rllllllillg ~s tool to tlle llydralllic packel tlllollgll tlll)illg to tlle wllipstock all~l tllell tlllollgll a series of channels witllin tlle wllipstock all~l olltO tlle packer. Tlle packel is set l)y plesslllillg p tlle dlill sten~ wllicll tllell l~asscs tllat plessllle ollto tlle pacl~el.
Ollce tlle packel is "set'', tlle wl~ stock ll~llst be l)lokell flee flolll tlle ~llill ste befole ally Illillillg ol Ieglllal ~llillil~g ol~elatiol~s l~lay l~locee~l. Tllis is a simple operatioll 20 - tlle dlill stell~ is laiseti. Tlle packel, if l~lol)elly allcllole~ tlle welll)ole, will not ll~ove and t~le sl~eal pill will slleal. All tllat lell~ail~s is to lemove tlle sllear pill block WlliCII is ollnted oll tlle face of tlle wllil)sto~k all~l to cllt illtO tlle si~le of tlle wellbole.
Tlle rellloval of i~le sl~eal pil~ block is llntlertakell by "Illillillg". 1ll botll tlle filst generatioll al~d illitial second gellelatioll tool a staltel Illill bit is Illace~l oll tlle drill sten1 ,s alld lowered illtO tlle welll~ole. Tl)e staltel Illill is lotated and ill tlllll lemoves the laised face. T'ilis sal~le millil~g tool Illakes tlle illitial cllt illto tl~e si~le of tlle casillg ill a cased llole. Tlle illitial Illillillg opelatioll Illakes al)ollt a sn.8 cn~ ~"1 ~leep l~ole. Tllat is to say tlle ol~eratol ollly rlllls tlle stallel ll~ill fol al~ollt olle-llalf Illetel 1~~1 total ~leptll before colllillg ollt of tlle ~velll~ole al~l cllallgillg llis starter l~lill l)it asseml ly. Ollce tl~is 30 filst mill 1'111~ is col~lplete, tlle staltel Illill is leplaced witll a secoll~l an~l lalgel Illill, knowll as a willdow Illill. Allotllel Illill, kllo~vll as a water-llleloll Illill, is mollllte~l al~o~e tlle window Illill. Tlle will~low Illill al~ vatel~ elol~ Illills ol~erate togetllel to elllalge tlledeviate~lopellillgilltllewell~-olesotllatlet~lllal ~llillil~gol~elatiol~sn~aypasswitllollt WOgs/23273 2 1 7 9 1 8 ~ r~ lllJ~3~77C4 restrictioll Gellera1ly tile win~low/watel~ eloll llit col11billatioJ~ is llsed for 2 meters [7' to 3 metels 110'1 illtO tlle deviate~l l1ole McLal110re ill1ploved tl1e secol1d gel1elatioll appalatlls al1d n1etl1od by placing the initial mill assembly oll tl~e end of tlle dl ill stelll immPr~ PIy above tlle wllipstock Tl~us, s once tlle wl1ipstock was flee~l floll1 tl~e dlill stell1, il~itial millillg collld proceed immediately This was celtaillly an ill1plovelllellt becallse ol~e trip illto and ollt of tlle wellbole was clirni-~tcd: llowevel, t~le il1itial Illillillg opelatioll cal~ ollly last abollt olle-half meter ~20~] befole tl~e mill Illllst be lel110ve~1 Tllis is becallse tlle setting tool, that is the piece of metal between tlle Illill alld tlle wl1ipstock wllicll llolds tlle whipstock to o the dlill sten1, will bllll1p agail1st tl1e casillg of a cased llole al1d callse tlle mill to Cllt into tl1e whipstock ratllel tl1al1 tlle casillg Tllis llas callsed problen1s in tlle past becallse tlle wllipstock face can be danlaged ol tlle wllipstock call be cllt illto leqllilil1g tl1at anotller complete assembly be placed ill tlle llole Braddick llses tlle sall1e illitial Illillil1g tecl~l~iqlle as McLan1ol-e Braddick l1as s other disadval1tages 11l a n1Prll~llirAl set packel, tlle applicatioll of sllfficient weigllt to set tlle packer is an absolllte llecessity Bla~l~lick llses tlle slleal pin betweel1 tl1e settil1g tool al1d tlle wl1ipstock to tral1sfel weigl1t to tlle merl~ ir~l packer Tllis meal1s tl1at the shear pill n1llst l)e caleflllly cllosel1 so tllat it will tlallsfer drill sten1 weigllt to tlle packer for settillg alld yet be s~lfficiel1tly weak to slleal ~llell tlle dlill steln is plllled llpwalds 20 lt is possible for tlle packel to mo~e Illlwald all~l lotate wllell tlle stell1 is plllled ollt of tl1e l1ole ill ol~ler to sllear tlle letaillil1g pill l~ecallse tlle pill Illay be stlol1gel tllan tlle packer letaillillg folce A Illajol impe~lil11ellt fol tlle secol1~1 gellel-ation wl1ipstock is tl1e sllear pin block ol1 tl1e face ol1 tl1e wllipstock wllicll n1llst be lllilled away so tllat tlle face becomes a zs smootll clll~ped face Tlle sl1eal l~ill l)lock lallges ill size floll1 2 54 to 3 81 centimeters tllick [1~ - 1 '/2"], 5 0~ to 7 62 celltillletels wi~le l_l/2" - 3nl, al1d 7 62 to iO 16 centil11etels long 13" - 4"~ It takes a col1sidelal)le al1-olll1t of tillle to ll1ill tllis block away aftel settillg tlle wl1ipstock Rel~olts flol11 tl~e fiel~l il1~licate tllat tllis l)lock cal1 callse nlln1elolls problems alld oftel1 leslllts ill sevelal tlips ~vitll flesll staltel n1ills ill oldel to remove the 30 sheal' pill l)loCk alld Illake tlle illitial Olle-llalf Illetel I~IIIS or Illilllls ~20n+] stalting Cllt in tl1e casing (or foln1atiol1) Secolld gel1eratiol1 wllipstocks llave fllltllel ~letlill1ellts Olle of tllese fllltlle detrill1ellts is folllld ill tl1e locatioll of tlle sl1eal l)ill itself all~l tlle fact tl~at tllis slleal pi WO 9S/2.2t273 2 1 7 9 1 8 ~ ~r~l/u~

can sheal if tlle dow~ ole assen~bly is lotate(l Tl~at is, not ol~ly will tl~e p~ g force sl~ear tlle pil~ whel~ sl~ealil~g of tlle pill is le<llliled, tlle tolsio~al force whicl~ can be induced wl~e~l tlle wl~ipstock is beii~g lotatecl ill tlle llole can inadvertently shear tlle pill This inadvertellt shearing is a disastel! Tlle possil~ility of illadvelte~lt shearil~g due to 5 rotational folces becollles vely lalge ill a lligl~ allgle wellbore. Wellbore angle is defilled as angle from vertical, thus a lligll angle llole apploaclles a llolizontal bole.
A fllrther detriment fol tlle secoll~l gellelatioll wllipstock occllls in neally veltical or low angle llole. The back of tlle wllipstock mllst lest against tl~e wellbole and tl~e whipstock is designed to pivot abo~lt a l~ ge pill lleal tlle bottom of tlle tool just above o tlle ancllo~ packer Il~ a medi~ to l~igll al~gle llole tl~e wl~ipstock easily falls agaillst tl~e wellbo~e, b~lt in a ~leally veltical l~ole tllele is little gravity col~lpollellt to pllll tlle tool against tlle wall Tl~is cal~ callse sollle ploblellls dlllillg tlle illitial (or sta~tillg) ll~ill operation - tl~at is tl~e wl~ipstock cl~attels agail~st tlle wellbole Tl~ele remaills all unftllfilled le~lllirel~lellt to be al,le to folce tlle tool agail~st tlle wellbole il~ a low a~gle 5 hole.
Tl~e final detlil~lel~t fol secol~l gellelatioll wllipstocks is tllat letlieval of tlle tool aher use is plactically il~lr--ccil-le Retrieval of ~lle tool will be illvalllable in modern ploductioll operatiolls where Illultiple draills ale desiled in a wellbole Thele are a nllmbel of otllel pl ior art patellts as liste~l in tlle followillg table tllat 20 relate generally to wllipstocks.
US. Pal~ v~lllor 'I'illc Issu~l No.
25 2,362,52() 12irlrrell el al. Si~l~ 'I r;ici;illg A~ r;ll~ls ~ t'2

2,558,227 Yalicey el al. Si-lew:!ll (`orL 'I ai;illu Alll-ar211us. 06/26/SI
2,821,362 llalcll~:r Exl~llsil-le Wl~ slocl; (~ 8l5i2

3,115,935 1loot~ V~ vic~ 1231/63 ~,765,~0~ ~ailey el al. Wllil~sl~ck l~aci;er As~elllllly (IX/23,i2,#
30 5,035,292 1~2~ilc~' ~'1 al. Wllil~sloc~ Slllrler Mill willl l~rcssurc l)rol~ 'I`alllclail (17/3(]/91 5,109,92~1 .lurgells el ~ lg l~ l all~l Al~ lrd~lls (~5/(15!9 5,113,93~2. Clayl~ Wl~ OS/19/9~
5,15-1,231 1~21iley el al. ~ -; Assel~ll>ly ~itll 22 lly~lraUliCtllly St'l Allcll-)r 10/13/92 Balrett et al. disclose "Si~le Tlackillg Al~palatlls" ol a wllil~stock Witll lolle bearil~gs ill its face Tlle lollel l~ealillgs ale Illeallt to folce tlle Illill agaillst tlle casillg wog~m273 2 ~ 7 q 1 8 4 ~ .'^77';4 .

Tlle wllipstosk is palticular~y desiglled to l~e llsed witll casillg Illat has l~aldel~ed sllcl~ that eonventional l~lilling tecllniqlles wolll(l I~ot wolk - i e. tl~e ~llill wollld plobably mill illtO
the wllipstock rathel tllan tlle easillg. Tllis wllipstock eollld ~e ealled tlle filst of tlle seeond gelleration wllipstoeks as it has its owl~ set of slips bllilt into the whipstoek; the 5 slips being set by foreing the wllipstock against tlle bottol~l oF tlle bore hole. The wllipstoek is lleld to its n~.ill by a slleal pill Tl-e loller bealillgs llln tlle entire hee of tlle whipstoek. Tlle whipstock desigll is solllewllat diffelent than tllose llsed today in that tlle whipstock does not llave all allgled slope to kick tlle Illill illtO tl~e casing (or side track tlle llole) bllt latller llas a stlaigl~t offset sectiol) tllat l llns tlle entire length of tlle desired ,o willdow Tl~e wl~ stock tlle~ as a vely sl~alp slope at tl~e bottom of the wllipstock whicl~ wolll~l act to sl~ove tl~e n1ill to tlle si(le. Acl~litionally tl~is disclosllle l~as no metl~od for orientation of tlle wl~ stock Yal~cey et al. disclose a "Si~lewall Col e Takil~g Apl~aratl-s'' wllicl~ Ilses a whipstock to folce a col-e takel illto tl~e si~le of a welll)ole Tlle device ~Ises a vely sllarp allgle o 15 tlle wllipstock face Wllicll lecllliles tl~at tlle cole takel Ilse a set of Ill~ivelsal joil~ts ill order to be able to make tl~e bel1~1 tvwal~ls tl~e si~le wall. Tl~e Illlivelsal joints m~lst be gllided al~l tl~e ~levice plovi~les a set of lollel bealil~gs in tl~e face of tlle wllipstock.
Tl~ese bearil~gs will also act to il~lplove tl~e l11eclla~1ical efficiel~cy of tl~e device. It shollld be noted tllat tl~e l~illillg slllfac~e of tlle cole takel ~loes l~ot act ol~ tl~ese bealil~gs.
20 Hatcl~er discloses al~ "Extel~si~)le Wl~il)stock" wl~icl~ is letlievable Tl~e device is not designed to be ol iel~tated il~ tlle llole al~l is set by placil~g ~veigl~t ol~ tl~e whipstock;
tllere is no releasable device. Ol~ce tlle deviated llole is drilled tl~e wl~ipstock will be witl~drawl~ flol~l tl~e llole witl~ tl~e lel~oval of tlle ~IIill stlil~g. Tl~ele is l~o ancllor packer associated witll tl~e device and tl~e ~levice cal~ ol~ly be llsed at tl~e bottol~ of a l~ole il~ a Z5 rocky foll~latio~ to wl~icl~ tlle ~vllipstock call glip witll a sllall~ poillt Tlle sllalp poil~t is n1eant to preve~t lotatioll of tl~e wllil~stock cl~llil~g tl~e ~llillil~g opelatiol~
Hooton discloses a "Well Device'' ~llicl~ is an in-plovel1~el~t to tl~e wl~ipstock by ploviding a well plllg at tl~e l)OttOI~l of a stal1~1al~ stock wl~icl~ cal~ be set il~ I)lace "by hydralllic pl~elln~atic explosive ol I~ecl~al~ical Illeal~s '' Tl~e disclosllre sl~ows an 30 ancl~or packer attacl~e~l to tl~e wllipstock wl~icl~ tllln is attacl~ed to tl~e dlill sten~ by a shear pil~. Tlle r l~r~ ic ~l settillg ~lealls is by loaded spl il1g actiol~ and not by settil~g drill stlil~g weigllt ollto tlle al~cl~ol I~ackel Also disclose~l is a single spl-ing wl~icl~
filnctions to folce tl~e wl~ipstock agail~st tlle welll)ole. Tl~e clisclosllle clain~s tl~at tl~e wo 9s/23273 2 1 i 9 1 8 4 single sp~ g is leleasably lleld ill place, bllt (loes llot sllo\v llol claill~ tlle apparatlls to tllis fllnctioll. Tllis disclos-lre states tllat tlle slleal pill is s~lealed by applying downward force to tlle slleal pil~; tl~is I11etllocl co~ l be llsecl to set a r~P~ ic~l packer;
but, becallse tlle sheal- pin is l~lokel1 by tlle ~lo~\~l1ward folce, tllele is no metl1od left to s check and see if the packel is plopelly secllle~ l tlle wellbole. (Noll1Ially tlle opelator plllls upwald, if tllele is lalge I1lovelllellt ill tl~e ~llill stelll, tllell it is known tllat tlle packer did llot set. If on tlle otllel Ilall~l tllele is ollly sligllt Illovelllellt - tl~e llatllral spring of tlle stling - followed by jlllllp, tllell it is kllowll tllat tlle packer is properly set.) Bailey et al. ('404) disclose a "Wl~ipstock Packer Assembly" wllicll is designed to o be use~l witll a sillgle tlip wllipstock assellll)ly all~l staltel Illili. Tl~is patent is a improvemellt to the McLalllole ~levice.
Bailey et al. ('79~) ~lisclose a "Wllil~stock Staltel Mill witll Plessllle l)lopTattletail'l wl~icll is ~lesig~led to be ~Ise~l witll tl~e sillgle tlip wllipstock assembly. Tllis device callses a ptessllre dlop ill tl~e ~llill stlillg wl~en tl~e stalter millillg opelatioll has s past a pledetelmil~ed poillt ol~ tlle face of tlle wllil~stock.
Jurgens et al. disclose a "Olle Tl il) Willdow Cllttil~g Tool al~d Apparatlls" wllicll utilizes a wllipstock assembly, a ~ low Illill all~l olle ol Illole watel Illeloll mills. Tlle disclosllle also states that tl~e wllil~stocl~ slol~e sllolll~l be l~etweell ~ an~l 3 ~leglees, bllt tllere is no claillI as to a givel~ al~gle llol a statelllel~t as to wl~y sllcll all allgle is disclosed.
20 Tlle device ~Ises a "slleal pin block" wl~icl~ is l~lille~l off by tl~e water melon mill. Otller palts of tlle disciosllle ale silllilar, if llot tlle sallle, as all otller secon~l generation whipstocks.
Claytoll discloses a l'Wllillstock'' wllicll will allow bole llole deviatioll flolll tlle low side of tlle llole. Tlle whipstock llses two splillgs to force tlle v~llipstock against tlle top 25 side of tlle llole. The device is ~lesiglle~l to opelate ill COlljlll~CtiOIl witll a llydla~llic packel alld tlle settillg tool llllls tl~lollgl~ tlle fa~e of tlle wl~ipstock. Tlle lllnnillg tool keeps tlle wllipstock splings ill tlleil colllplesse~l positioll; tlle splillgs are released wllen tlle settillg tool is rellloved. Tlle settillg tool also pt-ovides llydlalllic plessllre to tl~e packer flo~ll tlle l~lllllillg tool. Tl~e settillg tool is secllle~l I)y tllleALls an~l lelease of tl~e 30 setting tool fl om tlle wl~ipstock is acco~ lisl~e~ y "a fe~ l igl~t l~all~l l otatiol~s to ~ scl e~v tlle setting tool colldllit frol~l tl~e tl~lea~ls.'' Bailey et al. ('~31) ~lisclose a ''Wl~ stock AssellIl~ly witl~ a Hy~ilalllically Set Allcllol'' wllicll llses tlle tla~litiollal \~llipstock il~ co~ljllllctioll witl~ all llovel llydla~llic WO 95/23273 2 t 7 9 ~ ~ ~ F~ ~
g packer. The l~ydlAlllic packel- Iltilizes a better teclllliqlle to set itself ill tlle wellbore alld will lemaill so set upoll loss of llydlalllic l~lessllle. Tlle patellt ploposçs two metllo~ls of setting tlle assembly tlle filst beillg a Illetllo~l fol setting tlle asseml~ly witllout a stalter mill tllus leqlliring a millimlllll two pass ol~elatioll. Tlle secoll~l calls for settillg tlle s assembly witll a startel Illill ill l~lace wllicll reslllts ill a millillllllll ol~e pass operatioll. In general t11is patellt is all illlplovelllellt to pleviolls devices disclosed by Bailey et al.
Tllus tlle prior art ~las left a Illllllbel of disa~lvantages:
- it is difficlllt to llse a ~ r~ lly set packer wllich is clleaper t~lall tlle llydraulic packer.
o - tlle letaillillg slleal pil~ call illa~lveltently slleal wllell tlle wllipstock is being positioned witllill tlle welll~ole.
- tlle laise~l face of tlle Illolllltillg attac~lllllent to tlle wllipstock face (slleal block) mllst be Illille(l off befole ally ~leviatioll opelatiolls call commellce.
- tlle wllipstock assellll~ly Illllst l~e specifically desiglled to fit tlle give s clilllellsiolls of tlle welll~ole; tlllls Illally sizçs Illllst be warellollsed.
- it is easy to Illill illto tlle fac~e of tlle tool ~Illl-ing tlle illitial (ol stalt) Illillillg opelatioll.
- tllele is no metllod of llsillg all MWD (Measlllelllellt Wllile Dlillillg) Tool to detellllille wl~ stock olielltatioll; ollly wilelille teclllliqlles ca pleselltly l~e llse~l.
11l sllllllllaly~ existillg wllil~stocks llse~l witll si~letlackillg (or deviatioll) opelatiolls ale inflexible as to valiolls welll~ole sizes all~l tlle diffelellt conditions encollntelecl downllole. Tllis illflexibility lea~ls to illclease~l Illallllfactlllillg costs alld added lisk oF
failure becallse tlle wllipstock is extell~le~l beyolld its desigll clitelia. Tllis illventio 25 resolves a Il~ lber of illflexible collstlaillts.
Discloslllç of Illvelltioll . .
Tlle wllipstock of tllis illvclltioll call 1~ ellllallellt ol Ietlieval~le all~l collsists essentially of a settillg tool wllicll llol~ls tlle wllil~stock assellll~ly to tlle ~llill stelll a 30 deflectol llea(l WlliCIl attaclles 1O tlle tol~ of tlle wllil~stock l~o~ly all(l is sized to tlle diametel of tlle bole a wllipstock bocly wllicl~ is available ill tlllee size all~l all optional bottom end spacer. Tllele is llo slleal pill block oll tlle face of tlle w~lipstock tllat mllst be milled off; illitial staltillg gllillallce fol tlle \villclo~v Illill is plovided by tlle deflector wo 95/~3773 2 1 7 ~ 1 8 4 ~.,.,~ n1~4 head. Tlle deflector head WlliCII valies betweell 30.5 cm 11 l and 61 cln [2 ] long depelldillg on bore l~ole size is flllllisl~e~l ill llaldelle(l steel witll optional PCD
(polyclystalille diamolld) illselts. Tllese illselts selve to stop tlle initial milling operatioll fiom Cllttillg illto tlle wllipstock all~l as s~ate~l fllltllel folce tlle IDill agaillst tlle wellbole.
. Tle whipstock body llas a letlieval systelll cellteled at tlle Illid poillt of t~le body wllicll will illtellock witll a special fisll l~ook to allow fol Ietlieval of t~le wllipstock deflector head and ancllor packer. Tlle wllipstock illcol pol ates a set of spl ings ill tlle llinge wllicl ale lleld ill a compressed state Illltil tlle Illlit is set at Wllicll tillle the sp~ings call be released to help hold the back of tlle ~v1~ stock against tl~e wellbore. The whipstock o body and settillg tool are adapte~l to opelate witl1 eitl~el a ~ rllsiilirsilly set allcho packer or a llydlalllically set allcllol I)ackel witll tlle clloice being Illade ill tlle field.
1l1 a~ditioll to l~lovidil~g fol al~ love~l al~l wolkal)le tool al~ ol)ject of tl~e invelltiol~ is to minilllize leqlliled oil tool illvelltoly wllicll is ji~. b ..l.l;~l.rri by using thlee body sizes 20.32 cm ~o l 13.97 clll [S'/2Vl an~l ~.X9 cnl Ir31/2Nl fO~- the wllipstock. Tlllls 15 three wllipstock bo~lies can be llse~ fol bole lloles flolll 9.53 clll tlllollgll 31.75 cnl ~33/4 throllgh l2l~2 l. T'.le deflector llea~l wllich is attaclle~l to tlle top of tlle wllipstock body and occllpies at least tlle tol~lllost tlllee-telltlls Illetel [l ] of tlle ~vl~ipstock assembly allows fol diffelellt bole sizes witl)ill tlle lallge of tlle tlllee wllipstock bodies. All optional spacer may l)e reqllire~l at tlle l)ottom of tlle wllipstock I elow tlle llillge to take 20 Up tlle gap between tlle wllil)stock bo~ly all(l tlle wellbole.
Wllen tlle whipstock is llse~l witll a Illecllallically set packel it is easy to llse MWD (Measllrement Wllile Dlillillg) tools fol ~llipstock tool face orielltatiol~. Mlld circ~llatioll is Illziilltsii~ tllrollgl~ tl~e polt il~ tlle lllllllillg tool tllat is nollllally llse~l fol hydralllic oil wllel~ tl~e dowlll~ole tool is llse~- witl~ a l~y~lralllically set packel. Of colllse ~5 standald wile lille oliel~tatiol~ tecl~ni~llles ale still llseal)le fol tool face oliel~tation.
MWD is possible witl~ a l~y~llalllic packel bllt all a~lditional tool incorporating a pllz~tè~l by-pass "Zll~ wollld l~e leqllile~l beca-lse tl~e exit polt oll tl~e lllllnillg tool would be attacl~ed to tl~e llydralllic systelll.
Tlle wllipstock illcorpolates a special slot (settillg/letlieval slot) ill tlle face of tlle 30 tool wllicll sta~ts jllst below tlle deflectol llea(l allo Illlls to ~ ,u~i."altly tlle mid point of tlle tool. Tlle slot is of valiable ~leptll becallse tlle tool face l~as an allgle alld tlle slot is to forlll a perpelldiclllal elltly illto tl~e tool face. Tlle settil~g tool fits il~to tllis slot alld bottoms at tl~e bottol~l of tl~e slot. Tl~e settillg tool is l~el(l il~ place by a slleal pil~

woss/23273 2179 t 84 r~u s.

iocated lleal tlle bottolll of tile slot, ~ liCIl el)tels floll1 tlle tool back and is screwed illto tlle settillg tool. Tl11ls, veltical folce cal1 rea~lily i~e asselted oll tlle tool and ancllor. If tl1e force is il~ the dowllwarcl dilectioll, tllat folce is trallsfelle~l dilectly to tlle tool and allcllor. If tlle folce is llpwal(l, tl~e s~leAI pill ~ lst l)eal tlle folce ol flactllle. 01l tlle 5 otller l1alld, if tlle folce is tolsiollal, tllell tllat tolsiollal force is tlallsferled to wa11s of tlle settillg slot.
The setting slot also acts as a g~li(le fol tl~e retlieval tool. A retlieval slot is located sliglltly above t~le bottolll of tlle settillg slot. Tlle retlieval slot lllns flom the front of tlle setting slot to tlle back of tlle tool alld is desiglled to fit abollt a l1ook o located oll a specially desiglle(l letlieval tool. Tlle letlieval tool l1as an opening ill tlle l1ook face wllicll allows cllilling flllid to pass tlllollgll it. Tlllls MWD tools can be llsed ill colljllnctioll witll tlle letlieval tool to llelp ill estal~lisllillg llook olielltatioll. Tlle l1ook also l1as a spl illg loaded/pillne(l valve wl1icl1 is (lesiglle(l to close wllen tlle l1ook propel ly engagestheletlievalslot. Closllleoftllisvalvewillcallseapressllleplllseattlleslllface 15 whicl1 tells tlle opelator tllat tlle letlieval tool llas l~rol~elly engaged tlle wllipstock. Tlle hook is fllltllel desiglled so tllat it tell(ls to stlaiglltell ollt tlle wllipstock wllell a plllling folce is applied. A plol-elly ~lesiglle(l ~vllil~stock is Illeallt to fall agaillst tlle "backside"
of a wellbole alld if tlle tool is llot plllle(l stlaigllt, tllell tlle top of tlle tool will catcl against eacll joillt ill tlle casing. Tlle letlievsl tool llelps redllce tllis ploblem.
Finally, tllele is fln integral spl illg loa(le(l sllear pill witllill tlle letrieval tool wllicl~
is desiglled to plevellt illadveltent lelease of tlle letlieved wllipstock wllile ~ o~a~ g tlle wllipstock ill or(lel to llell~ it past all ol-stlllctioll ill tlle welll~ole. Tlle spling loaded slleal pill sprillgs illto a Illatcllillg cavity ~itllill tlle settillg/aliglln1ellt slot witllin tlle tool face of tlle wllipstock as tlle letlieval tool fisll~llook ploperly ellgages the letlieval slot.
25 Tlle splillg loaded slleal pill l~levellts ill(lel~ell(lellt dowllwald Illotioll betweell tlle wllipstock alld tlle letlieval tool; tlllls, lockillg tlle fisll-llook ill place. Note tllat tlle spling loaded pill can be sllealed, tlllls allo~Yillg fol "colltlolle(l leleasability".
Tile fllltllel a(lvantage to tllis (lesigll is tlle "colltlolled releasability" of tlle Retlievillg Tool. Tlle splillg loa(le(l slleal l~ill will slleal all(l allow tlle letlieval tool to 30 disellgage flolll tlle wllil~stock ~ el~evel s~lfficiellt (lo~Yllwal(l weigllt is apl~lied to tlle dlill '' stlillg. Colllplete letlieval is tllell pelfoll1le(l ~y slaci~illg off tlle letlieval tool wl1icl1 will back away flolll tlle letlieval slot l~ecallse tlle llook is tal~ele(l flolll its base to its face alld tllen lotating tlle (ll ill stl illg l-y a clllal tel tlll ll, tlllls, tllrning tlle llook of tlle retl ieval WO 95/23273 ~ 1 7 q 1 8 4 r ~ 'IC_t tool away flolll tlle slot. As tlle llook illitially ~ lls away flolll tlle wl~ipsrock tlle wasll port(s) will open and at tlle same tlle ~ l cilclllatiol~ pllml~s can be re-stalted. The excess mlld plessllle appealil~g at tl~e wasll l~olt(s) will l~e a tlemelldolls aid in leleasillg the hook fl~om the wllipstock.
s Tlle metllod of llse is lelatively silllple. Filst one of tlle tlllee body sizes of wllipstock is cllosell to most closely Illatcll tlle wellbole. Secoll(l a deflectol ~lead i5 cllosen tllat matclles tlle welll~ole alld is sec~lled to tlle al,~,luiJlidlc whipstock. Tl~ild tlle propel sized ancllor packel is cllosen tllat Illost closely Illatclles tlle wellbore and if required tlle optional bottolll spacer is bolte~l tO tlle wllipstock body. Finally tlle o rllllllillg tools Ill~lst be cllosell. If tlle allcllol pa~kel is lly~lalllic tllell botll a settillg tool alld an imploved pistoll sllb ale l-e~ e~l: llowevel ollly tlle setiillg tool is leq~ e~l fol a mef ~ ic~l allcllol packel . Tlle seltillg tool is size~l to tlle al~plol~l iate wllil~stock bo~ly and tlle saltle tool selves fol Ilotll Illecllallical ol Ilydralllic packers. Tlle complete downhole tool is assellll)led ill tlle stall~lal~l Illallllel oll tlle dlill floollrotaly tal~le witll proper attaclllllent Illade betweell tlle wllil~stock alld tlle settillg tool via a sllear pin. Tlle downllole tool is tllell loweled illto tlle welll~ole.
11l tl~e case of tlle Illecllalli~ally set l~ackel1~ stock do~vllllole tool asselllbly tlle tool iS lowered illtO tlle welll~ole Illltil it llits bottolll. Tlle ~Ilill stlillg is tllell laised as perstalldald 1,,u~c~l"cs all~l 1llll~l ~il~lllatioll stalte~l. Tlle cilc~llatioll allows olielltatio 20 sigllals frolll tlle MWD tool to pass to tll~ slllface. Tlle ~llill stlillg is tllell m~ ir~ t~d llntil tlle plopel otielltatioll is obtaille~l. Tlle packel is tllen set by placillg tlle req~liled weigllt oll tlle ~lowlllloie assellll~l~. Olielltatioll collld l~e cllecked illlllle~liately aftel settillg by MWD. Tlle ~irill stelll is plllle~l flee flolll tlle wllil~stock alld tlle stlillg is returned to tlle surface. Note tllat stall~lal~l wilelille orielltatioll teclllliqlles call still be 25 utilized.
Tlle lllllning tool is lel~lace~l all~l a will~low mill and watelllleloll mill(s) 1llll into tlle hole; tllele is NO lleed fol- a staltillg Illill as tllele is llo slleal pill block to relllove flolll tlle face of tlle wllipstock. Stall~lal~l Illillillg teclllliqlles follow and tlle illitial side tl-ack establislled. Tlle Illillillg tools ale tllell relllove~l alld le~lllal ~Ilillillg opelatiolls 30 begllll. Tlllls tlle wllipstock ill\~elltioll still reslllts ill a two-l~ass operatioll as ~loes tlle presellt second gellelatioll ~levice Illlless tlle opelatol wallts to elllalge the will~low beyond tllat obtainable witll tlle secoll~ ass.
11l tlle case of tlle lly~llalllic set l~a~kel tlle complete dowllllole tool is asseml~led Wo 9~/23273 2 1 7 9 1 8 4 ~ 4 and attacl~ed to its setting tool. Tlle settil~g tool is ill tlll ll attacl~ed to a piston sllb wllicl convelts mud plessllle to llydlalllic plessllle ill oldel to set tlle llydralllic packer Hydlalllic t~lbillg is rllll thlollgll tlle cllalll1els l~lo~ le(l ill tlle wllipstock and conllected between t~le setting tool/lllnllillg tool assellll ly alld tlle l~y~llalllic paeker. All otller 5 i'`r.tAll~rion details ale t~le salne as pleselltly llse~l ill tlle ill(lllstly. Note that standald wireline tecllniqlles mllst be llsed for tool face olielltatioll witll tlle llydralllic packel. It is possible to llse MWD teclllliqlles to olientate to tool face; llowever experience has sllown that tl~ere are higll fQillll e l ates witll pillllecl l)y-pass valves (a downhole tool w~licl permits the llse of MWD witll ~Iydlalllic llllllling tools).
o Retlieval of tlle wllipstock is lelatively stlaig~ltfolwal~l fol operatols wllo are experiellced wit~l "fis~ling tec~ les ll T11e 1etlieva1 lool is attac11ed to t~le bottolll of a down~lole stlillg wllicll illclllcles all MWD too1 allcl ally leqllile~l fis~lillg jals. Tlle ~
stl'illg is rllll illto tlle ~101e all(l CilCIllatiOII is l)lAil-tAill.~l 111 t~le alea of tlle whipstock tlle retrieval tool is orielltate~l to c~ose~y align witll t~le settillg slot wllicll acts as tlle tool 15 gllide fol t~le letlieval tool. T~le Illlld l~olt ill t~le letrieval ~look gllides t~le circll1ation in such a mallller t~lat t~le setting s~ot alld letl ieval s10t call be fl~ls~led c~eal of ally debris (cuttings sand etc.) t~lat coll1(1 illtelfele witll t11e 1etlieva1 opelatioll. T~le dli~l stlillg is t~len ~oweled lllltil it "bottollls''; t~le dlill sllillg is tllell laisec~ wllic11 callses t~le hook to pll~l illto tlle letlieva~ slot. As sooll as propel ellgagelllellt is Illa~le wit~l tlle letrieval slot 2~ t~le mlld polt va~ve(s) close wllic~l sellcl(s) a }~lessllle plllse to tlle slllface Annnll--nin~
n~A~- mellt of t~le letrieva~ slot. At allllost t~le sallle tillle t~le sl l illg loaded s~lear pin will latcll t~le letlieval tool into tlle Wllipstocli. Mlld cilclllatioll sllolllcl cease anci tlle dril~ stlillg laised to set t~le letlieva~ too~ illto t~le letlieval slot. Note tllat t~le splillg loaded s~lear pill wllic~l iocks illto t~le face of t~le settillg slot can be llse~l as a ~allc~illg 25 poillt ill ol~ler to "leset" ally fisllillg jals tllat Illay l)e illclllcle~l ill t~le clowlll~ole letlieval assemb~y. Tlle weigllt leqllile~l to slleal tllis lockillg i-ill is l~lllc~l llig~ler t~lal~ tlle weight ~eede~l to le~set tlle fisllillg jals: tlllls "colltloll~ leleasability" is Illail~tailled.
As t~le ~lill stlillg is laisec~ t~le i~llllillg folce sllollld illclease. All illcrease in pll~illg folce is a secollcl illc~ica~ioll ot ellgagelllclll~ Wi~l tll~ lellieval lool plol~elly 30 ellgaged an~l as l~le lool is pllllecl Ill~ al~ e llook will Illove fllllllel back into Ille letlieva~ s~ot all~l pll~ le \v~ stock tool f~ce illto aliglllllellt ~vitll tlle wllipstock base allcl ancllor. A~l~litiollally tlle extla lellotll of tlle llook ~ill extellcl beyolld Ille wllipstock l)ack asslllillg tllat tlle tool lop will llot 1lll~ aoaillst t11e ~el1bole. Tllis Illealls tllal t~le c~lances w09s/23273 2 ~ 7 9 ~ 8 4 r~ 4 of tlle tool top (or llead) catcllillg agaillst eacll alld every casillg joillt ale s~hst?-~tillly redllced. Tlle optiollal fislling jals call be leset as lleeded i~l order to assist ill tlle retrieval of tlle whipstock.
The anchor packer llse~l with a letlieval)le wllil~stock be it n~rll~ni~ally set ol s llydlaulically set is cllosen so tllat it illcoll~olates sl~ear screws il~ tlle llppel set of slil~S
(orwedges). As tlle wl~ipstock/l~acker is laise~l tlle pll~ g folce will illclease and sllear the uppel slip shear sclews. Tl~is leleases tlle llpl~el slips oll tlle ancl~or packer and tlle packel call llow move llpwald. As tlle packel Illoves IrFwar~ls tlle packillg will collapse as the packel extends agaillst tlle bottonl set of slips wllich sllollld release. It sllollld be o noted tllat tlle lowel set of slil~s oll a packel ale llesiglle~l to glip ill tl~e dowllwald dilectioll; tlllls if tlle lower slips ~lo llot lelease tlle l~ackel call still be plllled ollt of tlle wellbore. Tlle elltire wllipstock/l~ackel assellll~ly is llOW flee tO be witll~llawll f,o,ll tlle wellbore and a standard tlip ol~elatioll llow follows.
It sllollld be lloted a settil~g slot all~l if llecessaly a retrieval slot can be m~ f~ctllled or placed ill tlle tool face of existing wllipstocks. 11l fact existillg walellollse stock collld be illo~lified ill tlle fiel~l to illcolpolate a setting slot alld a retlieval slot. Tllis wollld allow tllc te~ es ~lesclibe~l al~ove to ~e llse~l witll secolld gelleration wllipstocks Tllis collcel~t will l~e discl-ssed at a latel time.
20 Blief Desclil-tioll of r~lawill~s Figllle I is all elevatiollal view of tlle Wl-IIP-ANCHOR llsed witll a mecllallical packel wllose OD is apploxilllalely tlle sanle as tlle WHIP-ANCHOR.
Figllles IAA tlllollgll 1 EE ale closs-sectiollal views of tlle Wl-ilP-ANCI IOR taken at tlle lines illdicated ill tlle maill figllle Figllles IA tlllollgll IE ale cross-sectiollal vie~vs of tlle Wi-llP-ANCi-lOR takell at tlle lines ill~licated ill tlle Illaill fig~lle sllowillg tl~e pliol alt.
Figllle ~ is all elevatiollal view of tlle Wl-IIP-ANCHOR llse~l witll a l~ydlalllic packel- wllose OD is lalgel tllall tlle Wl IIP-ANCI IOR. ~llis figllle selves toillllstlate a variallt of tlle Wl-IIP-ANCIIOR system wllicll llses tlle optiollal spacer.
Figllles ZAA tlllollgll ~FF ale closs-sectiollal views of tl~e WHIP-ANCHOR take at tlle lilles illdicate~l ill tlle Illaill figllle Figllles ~A tlllollgll ~F ale closs-sectiollal vie~vs of tlle Wi IIP-ANCHOR takell at W095/23273 2 ~ 79 1 3~ T~l/o~Ya~u~a~

tlle lilles illdicate~l ill tlle Illaill figllle sllowillg tlle pl-ior alt.
Figllle 3 is a flolltal elevatiollal view of tl~e WHIP-ANCHOR system looking dilectly at tlle tool face all~l llse(l witll a ~ lir,31 packel wl~ose OD is lalger tl1an tlle Wl-IIP-ANC~IOR. Tlle illllstlation sl~ows tl~e pliol alt s profile.
Fig~lles 4A tllrollgll 4D sllow a selies of views tlle deflectol Ilead used oll tlle WHIP-ANCHOR systelll.
Figules SA thlollgll 5C sllow a series of views of tlle WHIP-ANCHOR hinge, llillge pin, hinge sprillgs, alld splillg letaillel s11ear pin.
o Figllles 6A tllloIlgll 6C sllow tlle ~letails of tlle optiollal spacel block.
Figure 7 is a side elevational view of tlle Wl IIP-ANCI ~OR systeln attaclled to its lespective valiallt of tile l~ccllallic~l Settiilg Tool.
FigIlle 8 is a side elevatiollal view of tlle ~IIIP-ANC~IOR systelll attaclled to its espective valiallt of tlle Hy~llalllic Settillg Tool.
s FigIlle 9 gives details of attacl~ ellt of tlle Settillg Tool to tlle WHIP-ANCHOR, Figllle 9A is a closs-sectiollal view of tlle Settillg Tool Witllill tlle WHIP-ANCHOR
settillg slot taken at AA ill FigllIe 9.
Figllles 10A alld 10B sllow collstlIlctioll ~letails fol tlle pleferled ell1I~odiment of tlle settillg tool Ilsing a settillg I)al all(l tl~l~IIlal welcle~l to a top slIb.
Figllles 10C all(l 10D sllow collstlIlctioll cletails for all altel-llate ell1bodin1ent of tlle settillg tool Ilsing a setting l~al wel(le~l to a top sllb witll space for attachnlent of a llydlaIIlic llose.
Figllle I IA is a flollt view of tlle lowel poltioll of tlle settillg slot givillg tlle location of the letlieval slot.
Figllre l l B is a side sectiollal view of tlle lo~vel l)ol tioll of tlle settillg slot sllo~ll i Figllle IIA.
Figllle IIC is a si~le sectiollal vie\v of tlle settillg alld letlieval slot sllown witll tlle letlieval tool latclled ill place.
- Figllle 17A is a side sectiollal vie~v of tlle Filst Elllbodilllellt of tlle lower section of tlle letlieval tool.
Figllle l~AA is a closs sectioll of tlle Filst EIllI~odilllellt of tlle letlieval tool take at AA/AA ill FiglIre 17A.
Figllle 17B is a si~le sectiollal vie~ of tlle S~coll~l Elllbo~lilllellt of tlle lower section WO95/23273 2, 7 ~ 1 8~ I~".,~ ~ I
.

of tlle letrieval tool.
Figllre ]2BB is a cross sectiol~ of tlle Secoll(l Elllbodilllellt of tlle letlieval tool take at BB/BB ill Figllle I~B.
Figllre I~C is a cross sectiollal view of tlle Pistoll Sleeve Valve to be llsed witll tlle Retlieval Tool of Figllre I~A ol Figllle 12B and illllstrates tlle p~eferled positive retrieval tool cl.6..6c.,.cnt illclicatol.
Figure ]2CC is a sectiol view of tlle Pistoll alld Slllrolllldillg Spling of tlle Piston Sleeve Valve taken at CC ill Figllle 12C.
Figure l~D is a frontal view of tlle llook face of tlle letlieval tool taken at C/C i o Figllle 12A ol Figllle 12B.
Figllle 13A illllstrates a filst altelllate to a positive letlieval tool engagell~elit ill~licatol wllicll is sllowll oll a tool llsillg tlle Filst Eltlbodilllellt of tlle lower sectioll of tlle letlieval tool.
Figllle 13B illllstlates a secollcl alterllate to a positive retlieval tool engagelllent in~licator w~licll is sllo\vll oll a tool llsillg tlle Secolld F~ rlt of tlle lowel sectioll of tlle letlieval tool.
Figllle 14A s~lows tlle plefelle~l ellll~o~ lellt of tlle letlieval tool latclling mecllanism witll tlle letlieval latcll ~ill ill tlle bo~ly of tlle wllipstock and tlle eceivillg slot ill tlle l~o(ly of tlle retlieval tool.
~o Figllre 14B sllows all altelllate ellll~o(lilllellt of tlle letlieval tool latcllillg mecllanism witll tlle letlieval latcll pill ill tlle l~o~ly of tlle letlieval tool alld tlle leceivillg slot ill tlle body of tlle wllil~stock (tlle levelse of Figllle l~A).
Figllle 15A sllows tlle letlieval tool lleal tlle tol~ of tlle WHIP-ANCHOR abollt to be olielltated to sclllb tlle settillg slc)t.
~5 Figllle ISB SllOWS tlle letlieval tool witll its llook face facillg tlle settillg slot at tlle legilll~illg of tlle scllll~ of Ille settillg slot.
Figllle I~C 5110~4S tlle letlieval tool lleal tlle l~ottolll of tlle settillg slot imlllecliately prior to bottomillg ollt oll tlle l~ase of tlle slot all~l pliol to pllllillg llp to ellgage tlle letrieval slot.
Figllle 15D sllows tlle letlieval tool flllly ellgaged ill tlle letlieval slot letlieval latcllillg -~ecl~ ic-~- aliglle(l all~l latclled all~l witll tlle llook extellclillg tlliollgll tlle back of tlle ~'IIIP-ANCII~R tlllls dlawing tlle ~ack of tlle WIIIP-ANCHOR a\~ flolll tlle ~elll~ore.

-~Wo9sn3273 2 ~ 791~4 r~ c~

hgllles 16 throllgll 19 sllow ~etails fol tlle settillg tool sllowi~lg how one tool is usecl for botll r ^^~ ir^l al~ y~lla~ ^ ol1elatiolls Figllles 16 and 17 show tlle Filst (ol Plefel le~l) Elllbo~ llellt oF tlle settillg tool, wlleleas Figllres Icrs and 19 SllOW tlle Secolld (Ol' Altelllate) El1lbodinlellt of tl1e setting tool, boths respectively llsed fol settillg Mecllallical and Hydlalllic Packers.
Figure 20 SllOWS details fol tl1e Illakillg llp of the llllllling allangen3ent fol the WHIP-ANCHOR with a n1ecllallical packel w~lic~l illcllldes tlle settillg tool, MWD, etc.
Figllle 21 shows details fol tlle Illakillg llp of tlle lllllllillg alrallgemel1t fol tlle o WHIP-ANCHOR ~vitll a llycllalllic l~a~ el wllicll illclll(les tlle setting too~, tlle stalldald wileline olientatioll sllb, etc.
Figllle 77 sflows~etails fol tlle Il1akil1g ~p of all altelllative 1111111illg allangelllellt fol tlle WHIP-ANCHOR witll a llydlalllic packel wllicll illcllldes tlle settillg tool, MWD, a pillned by-pass sllb, etc.
Figllles A73 all~l 74 51lO~' tlle ~ll ill stelll, settillg tool, al1~1 ~lowllllole assembly ill place ill a welll)ole befole sllearillg tlle slleal l~ill fol a Mecllallical all~l Hydralllic Packer lespectively.
Figllles 23A and 24A sllow tlle lespective pliol art.
Figllles 25 and 76 sllow tlle ~llill stelll, settillg tool, and do~nhole assen1bly in place ill a welll)ole aftel sllealillg tlle sl~eal l~ill at tlle elld of tlle filst pass fol a Mecllallical and ~Iydlalllic Packel Iespe~^tively.
Figllles 2~iA alld 76A sllow tlle lesl~ective pliol alt.
Figure 77 sllows tlle col11lllete Illillillg assell1111y at tlle begil1llillg of tlle second pass operatioll ill a case~l wellllole fol eitller a Mecllallical alld Hy~llaulic Packe lespectively.
Figllles 27A and 77B sllow tlle l~liol alt.
Figllre 2~ sllows tlle coll1plete Illillil1g assel11l)ly at tlle elld of the second pass opelatiol~ stlatillg tlle ol~ell will~lo\v ill a casecl wellbole fol eitllel a Mecllallical alld lly~llallli(~ I'a~^lcel lesl~ectively.
Figllre 79 sllows a closs sectioll of a ''Slll~ witll Pistoll" Bottoll1 Hole Assen1bly (BHA) lllllllillg tool ~vllicll is llse~l ill tlle prefelled metllod fol settillg a WHIP-ANCHOR with a lly~llalllic packer.
Figllle 30A is al1 elllalged vie~v of tlle Pistoll of Figllle 79.

-WO 95123273 2 1 7 ~ 1 8 ~ . r m77~1~
~ 18 ~
Figllre 30B is a bottonl view of tlle Pistoll of Fig~lle ~9.
Figllre 31 illustrates a proposed Botto~ lole Assellll)ly (BHA) assembly fol Ilse witll tlle retlieval tool.
Figllle 31A illllstlates tlle aitelllate make llp if all orientation sub is used ill the s place of and MWD tool Figule 32 illustrates all altelllate elllbo(lilllellt fol tlle settillg tool and setting slot which considers ploblellls lais~d if tlle stlellgtll of Illaterial becollles a facto 10 Modes fol Calrying Ollt tlle Illvelltioll Tlle plesent illvelltion will be (lesclibed ill (letail ill wllat is telmed as a two pass operatiol~ wllicll tlle wl~ipstocl; ttl~e itelll of II~e il~velltiol~) al~l al~ allcllol packel (he it a hydralllically or Illrr~ irAlly set packel~ ale releasably secllled to a settillg tool and any otllel Ieqlliled tools, all of wllicll ale ill tlllll, collllected to a dlill stlillg. Tlle elltire s downhole whipstock and allcllol-packer assellll~ly will be lefelled to as a ll~ip-AIlcllor ill tllis discllssioll.
A two pass opel atioll begil~s wl~el~ tl~e dl-ill stl illg, witll tlle Wllip-Allcllor attached via a settillg tool, is loweled to tlle (lesile~l level ill a wellbole a~ld tlle~ nirlll ltcd and so tllat tlle wllipstock faces ill tlle (lesiled dilectioll Tlle drill stlillg is tllen fllrtller 20 ~ d to set tlle allcllor packer wllicll in tlllll Ilolds tlle wllipstock in tlle deslled orientation in tlle wellbore. Ollce tlle packel is plollelly set tlle dlill strillg is fleed flom tlle Wllip-AIlcllol by pllllillg llpwald oll ti~e dlill stlillg Tlle dlill stlillg is witlldrawn fionn tlle llole; tlllls, completillg tlle filst pass In a cased hole, a will(ioW all(l watelllleloll Illill assembly is tllell placed oll tlle 2s drill stlillg alld tlle dlill stlillg lowele(l illto tlle welll)ore fol tlle secolld pass operatioll (Note tllat tlle willdow and watelllleloll Illill assembly gellelally collsists of A single window mill and olle ol mole watelllleloll Illills ) Tlle dlill stling is tllell llsed to cllt a willdow ill tl~e casing fol dlillillg tl~e welll~ole il~ a deviated dilectioll. Once tlle willdow is complete tlle (llill stlillg is witll~lla\~ll flolll tlle llole tlllls collll~letillg tlle secolld llass 30 If tlle welll~ole is opell llole ol Illlcase~l, tlle secoll~l pass may be olllitted alld legllla deviated llole dlillillg Illay l~e collllllellce~l All of tllese ploce~lllles ale well kllowll i tlle alt and tlle Illaill discllssioll of tllis illvelltioll ~Yil~ celltel al~ollt its llse in cased lloles It shollld be Illl~lelstood tllat tl~is ~lisc~lssiol~ ~loes llot selve to limit tl~e llse of tlle ~ ogs/23273 2 T 7 9 T 8 4 invelltioll in cased l~oles; bllt ollly selves to aid il~ tlle descriptioll of tlle device al~d method wllele needed con~ ellts will be Illa(le al)olll tlle appalatlls al~d its llse in open hole In discllssing mllltiple l~ass opelatiolls fol settillg tlle pliOI' al't wllipstOCk Ol' tl~e s instant illvention, it n~llst be lealized tllat, altllollgll pleparatioll of tlle bore l~ole is critical, propel pleparatioll of tlle bole llole is NOT consi~eled to be a part of the setting operation for a whipstock Tlle wellbole n~lst be cleal~ and flee flom any and All obstrllctiol~s and llole conditions l~llst be kllowll (Tllat is size of casing, if cased;
type of cen~ent; whele cel~lent is; foln~atioll tyl~e: etc ) Tlle telll~ "llole conditions" is a ~o te~ well llsed il~ tlle alt al~l also lefels to tlle Al)ility to cilclllate ~llillil~g flllids il~ tl~e wellbore Palt of tlle ple~aratioll fol settillg a wllil~stock illvolves n~akil~g a tlip illto tlle wellbore Witll a fllll gallge tapel n~ill pllls two fllll gallge watelll~elon mills (a so called "locked llp bottol~ ole assel~lbly") to l)elo~v tl)e poillt of plalllled sidetlack A ''tlip" is 15 a term of alt wl~icl~ desclil)es el~telillg a bole llole witll a ~llill stlil~g al1d exitillg the bole hole, altl~ollgl~ tlle tel m call be llse(l fol a "olle-way tl ip" Ollce tlle bottol~ ole assen~bly is below tlle l)lal~l~e~ oillt, ~llillillg fllli~l is cilc~llate~l Illltil tlle llole is clean A "cleall llole" is readily ~letell~ e~l l)y tllose skille~l ill tlle alt of wellbole drillillg by obselvillg cilclllatioll lates, plllllp llolse po~el le~lllilelllellts~ mlld plasticity (rlleology), 20 net weigl~t on bit, as tlle bottol~ Ilole assel~bly is lo~ered al~d raised in tlle llole, etc If tl~e l~ole col~ditiolls do l~ot allow fl ee Illovell~ellt (leci~locatioll) ~f tlle dl ill strillg and botton~ Ilole assembly, tllell tlle plalllle~l settillg of tlle wllipstock sllolll~l be abandolled Tllose skilled in tlle alt of settil~g ~ stocks kllow tllat lllllllillg a wllipstock/packe assembly illtO a wellbole witll Illlkllo~ll coll~litiolls is foolisll alld dal~gelolls 25 Wellboles ale llOtOliOlls fol collapsillg, fol Ilavillg lligllly twisted condllits, alld otller myliad ploblel~ls Tl~lls, ~llell tl~e actll~l wl~ stock is 1~ illto the wel11)ore, it is often necessaly to lotate tl~e wl~ stock/al~cllol assembly al~d leciplocate tllat asseml)ly Tl~e sal~e Illay l)e sai~l wllell a ~vllil~stock is letlieve~l floll~ a ~elll~ole; tlllls, tlle letlieval tool must be capal~le of letaillill g tll~ sto~k/l)~ckel asselllbly ~IIllillg leciprocatioll of 30 tlle dlill stlillg Tlle c~lllellt teclllliq~le of Illolllltillg tlle ~vllil~stock to tlle dlill stlillg via a sl~ear pil~ al~d sl~ear block ~loes not ~le~ellt tolsiollal slleal ol~ tlle pil~ or does tlle n~etllod allow fol lalge ~lowllwal~l exeltioll of folce oll tlle wllipstock; tlllls, tlle slleal pill call wo 9s/23273 2 1 7 q 1 8 4 P~ c~

sl,ear w~el~ it sl~o~ ot! Tl~is i~velltio~ esol~es tilese p~ol~lell~s; llowevel- it does not resolve tlle llpward exeltiol~ of folce becallse tlle sllear pil~ st sllear at a given folce which may be less tllall tlle folce llee~led to fl-ee a st~lck wllil)stock. Tlle nlere fact tllat increased downward folce is available collld save a wellbole if tlle wllipstock becomes s stuck. Tllis is because tlle stllck wllipstock call be folced to tlle poiDt of deviatioll olientated and llsed: or tlle stllck wllil~-stock colll~l be folced below tlle pOillt of deviatioll and ~
1l1 ~id~ Lil.~ wellboles tl~e cleviatioll to tl~e new well pat11 Illllst be establislled from the ol~l wellbole. Tllis call be accolllplislle(l by settillg tlle presellt alt wllipstock-o /packel assembly and ploceedillg tlllollgll a selies of Illillillg opelatiolls. Tl~e amollllt of deviatioll of tlle new well patll flolll tlle ol(l ~ell~ole patll is lilllited by tlle stlellgtll of matelials flolll wllicll tlle Illill llo~lies ale Illa~le ~llell llsillg lotaly (llillillg teclllli(llles to sidetlack tlle old welll)ole. Tllese Illill l~o~lies c~ll ollly witllstall(l a celtaill alllollllt of bending (or flexillg) stless befole Illey flactllle. Exl~erience llas sllowll tllat:
8.57 cnl [33/~NI OD Illill bo(lies wllicll ale llsed oll llole sizes flolll 9.53 cm ~33~41 OD to 13.34 Clll [51/4"~ or) will safely witllstand a Illaximl~lll of 2.5 deglees of deflectioll pel 30 metels ~100 1 wllist Illillillg;
12~07 cm ~43/4NI OD mill bodies wllicll ale llsed oll lloles sizes frolll 13.7-1 Clll ~5~/4"1 OD to 20 cnl [77/3 1 Ol) will safely witllstall(l a nlaxillllllll of 3 deglees of (leflectioll pel 30 Illetels 110 1 wllist l~lillillg;
16.51 Clll ~61/2 l OD mill bo~lies wllicll ale llse(l Oll lloles sizes flo~ 0 cm j77/3 ]
OD to 7~.13 Clll l9'/2 l OD will safely witllstalld a maximllm of 6 deglees of deflection pel 30 meters 1100 1 wllist millillg; alld 20.3~ cm ~8NI OD mill bo(lies ~llicll ale llse(l oll lloles sizes flolll ~.13 Clll 191./2"]
s ODto31.75 Clll 11''/2"l OD~'ill sarclywitllstall(l a Illaxillllllll of 12(1eglees of deflection pel 30 Illetels 1100 1 wllist Illillillg.
Tlllls cllllellt wllipstock Illallll~actllles a(ljllst tlle Tool Eace slol~e to Illeet tl~ese clitelia;
however eacll size(l wllillstock llas its O~ al~ic~llal slol~e alld bo(ly size. Wllell a wllipstock is set ill a welll~ole it is celltele(l wi~ l tllat wellbole. Tlle llillge ill a 30 wllipstock allows tlle celltele(l wllil~stock to ~11l~ ol f~ll agaillst tlle welll~ole so tllat tlle top has llo gap an(l tlle Illill sees a COlltill~lOIls s~llface tllat is plol~elly (~eflecte(l at tlle correct slope.
Tlle illvelltol llas llote(l tll ~t tlle efrecti~e tool face slope will illclease ~llelleve ~w095/23273 2 ~ ~9 ~ ~ . ."~, 77~4 the lool dlops agaillst the back of tlle wellbole. A~vantQge of tl~is fact can be takell by proposillg tlllee (or more) Wllip-AIlc~lol types. Fol example, ill all 70.96 cnl ~81/4"l ID
bore, Witll a Whip-Ancllor llavillg A 70.3~ cnl 18"1 OD body alld having a tool face slope of 3.18 deglees, the effective tool face slope will illcrease to abollt 3.~8 degrees. Tllis 5 is becallse the back of tlle tool falls against tlle wellbole t~llls incleasin~ the deflection angle. Tlle lesultillg "effective tool face allgle" is well witllill tlle collstlaints listed above.
In a similal manner, in a 31.75 cnl [l71J2"] ID bole llsillg a Wllip-AIlchor having a 70.37 cm [8"] OD tlle effective tool face allgle will illclease to al)ollt 4.07 deglees. Bllt again, tllis effective angle is well within the al~ove liste~l collstlaillts.
o silllilar examples call be state~l fol otllel sizes of wellbole alld t~le inventor proposes tllat tlllee types (ol sizes) of Wllil~-AIlcllol will safely all~l effectively opelate in commoll wellboles sized flollI 9.53 clll 133/4"1 to 31.75 clll [17'/2"1. Tllis concept collld readily be extended to lalgel (ol slllallel) bole sizes allcl tlle clloice of tlllee types of Whip-Ancllol sllollld llot be takell as a lilllitatiol~ oll tlle illvelltioll. Tl~ese tllree types s will covel tlle Illost commonly ellcolllltele(l \vellboles ill tlle illdllstly alld will selve to redllce illvelltoly stock of wllil~stocks. Witll all tllese poillts ill Illind tlle illstallt illventioll, wllicll is a selies o~ sillglllal sll-all illvelltiolls allcl illlplovelllellts follllillg a wolkable dowllllole tool, will be (lesclil)ed.
Attelltioll is first dilected to Figllre 1, Figllle 7, and Figllle 3 of tlle dlawings 20 whicll illustrate tlle illstallt illvelltioll as it wolll~l appeal pliol to beillg placed illside a wellbore. Figules I and ~ sllow a si~le elevatiollal view an~l a selies of closs-sectional views of tlle maill palt of tlle illstallt ill~elltioll, llalllely tlle illlploved wllipstock Illollllted to a merl)AI1inAl packer (Figllle 1) all~l to a ll~ lalllic l~ackel (Figllle 7). Tllele is little differellce betweell tlle two Wllil~-AIl~llols ill Figllles I all~l ~ as regards tlle wllipstock.
25 Vely little discllssioll of tlle packel will be Illl~leltakell sillce it does not folm a palt of tllis invelltioll; llowevel, tlle type of packel llse~l does affect tlle ''pllllllbillgll of tlle instant inventioll alld tlle Illake-llp of tlle tools llse~l to Illalliplllate tlle Wllip-AIlcllol. Figllle 3, on tlle otllel llalld, sllows a flollt elevatiollal view of tlle tool attaclled to a Illecllanical packel wllicll is tlle silllplest ellll)o~lilllellt of tlle ills~alll illvelltioll.
30 Tlle illvell~ioll, as l~leviollsly s~A~e~l is a selies of illvell~iolls wllicll Illake llp a colllplete systelll (apparatlls) all~l a selies of Illelllo~ls fol settillg alld letrievillg Wllip-Anchors. Tlle systenl is ma~le llp of:

w0 9s/23273 2 1 7 ~ 1 8 ~

A deflector i~eacl, A whipstock bo~ly wit~ a s~ g l~ ge sectiol~, An optional spacel, A cross-over slll), all~l s A me-~h~ l packel, alld A mecl-allical settillg tool, o A llydlaulic packer, all~l A hydlalllic settillg tool, alld an improved pistoll slll~, o o A retrieving tool, I~llls Otllel Ilecessaly (existillg) ~IIill stlillg tools.
Staltil~g witll Fig~lle I al~d Figllle 3, ~Yllicll illllstlate tlle il1stallt illvention in its simplest el~ll)odimellt~ t~le top of tlle tool body, 4, is sllowll with its deflector head, 7, in 15 place. Tlle deflectol llead is fllltllel illllstlate~l ill Fig~lres 4A-n alld will be discllssed in detail latel. The deflectol I~ea(l, 7, is Illollllte~l to its wllil~stock l~ody, 4. Botll tlle defiector llead and tlle wllipstock bo~iy l~lllst l)e cllosell to fit tlle pal tic~llal wellbole size, 30. Figllres lAA tlllollgll 1 EE (as well as ~AA tlllollgl~ ~FF) sllow closs-sectional views of the wllipstock body; tlle eqllivalellt l~liol alt closs-sectio~lal views ale s~lown on tlle 20 left-llalld side of tlle ill-lstlatiol~. Tlle ~liffelell~e l-etweell tlle pliol alt alld tlle illstallt invention ale clearly ill~lstlate~l. 11l tlle pliol alt tlle c-lppe~l ol c~llved face, Il, of the wllipstock rall completely flol~l olle si~le of tlle welll~ole to tlle otlle~ side; tl~e illvelltOr has discovere~l tllat tllis colllplete clll~l~e~l face is llot l1ecessaly all~l tllat a slloltened version as sllowll ill tlle closs-sectiollal vie\~s will sllffice. 01l tl~e otllel Ilalld tlle ,s deflectol Ilead, 7, mllst 1llll flolll si~le to si~le of tlle wellbole ill oldel to deflect tlle window mill to tlle side of tlle ~elll~ole. Ollce tlle Will~lOW Il~ las stalted its Cllt illto tlle wellbole side, it lleed ollly l~e glli~le~l by tlle paltial cllpped face of tlle instant invention. Tlle flllcllllll effect of tlle ~llill Stlillg will also ai~l in directillg tlle willdow Illill to tlle side of tlle wellbole.
Tilis discovely fllltllel Illealls tll~t a sillgle wllil~sto~k i~ody can selve ill a Illlmbel of diffelellt sized welll~oles wllicll is collll~letel)~ ~liffelellt flolll tlle pliOI art ill ~llicll a whipstock l~o~ly colll~l ollly be llse~l ill a givell l~ole size fol wllicll tlle llo~ly was ~lesiglled.
Tlllls, tlle illvelltol colltelllplates tlllee types (ol sizes) of wllil~stock bo~lies as givell ill W095/23273 2 ~ 79 1 84 P ~ C4 2 :~ --the table below, which will operate ill welll-oles floln 9.53 cl~l 133/4"~ to 31.75 cm l121/2nl.
It sllollld be lloted tilat tlle gi~ell sizes of wellbole ale ill comn1011 llse and these sizes are not intended to act as a limitatioll oll tlle illvelltioll, as tlle collcept could easily be extended to sn-allel ol lalger boles by tlle silllple expedient of cllanging tlle size of tlle 5 body. In a similar mannel ad~litiollal body sizes collld be illserted in the table so tllat tlle optiollal spacer, to be discllsse~l, wolll~l becollle Illlnecessaly. Tlle actllal wilipstock body wollld be manllfactllled llsillg cllllellt ll~atelials alld teclllliqlles. A mild steel will be used; llowever, the tool face sllollld llave a llal~lened slllface folmed fronn Tllllgste Carbide to lesist wear. The fillisllillg tec~ lle goes by sucll trade names as o "Clustelite" ol "Zitcoloy". These ale ploplietaly a1l~l well establislled weldillg teclllliqlles fol placing a llald fillisll oll a slllface tllat will lesist wear.
Wlllr-AiiCllOR T~ri~ R Sl~/,BI Ai'li~ l'ARAMETERS
'I`yl-e l~o~ly Si7,c l-ilb 1~01~' Si~' I ils ~-I!Sillg Si/,~ I o-)l l acc ~s Wllil~sl~ck Cl~ crs ('-~ rs Allglc (`urvrluru 8.89 ~.53-13.~7 ~ 3-i6.t~.~ 2.()9 13.97 Il 13.97 ~ .37 17.7~-2i.~J1 2.67 ~).32 11170.32 7~ 6-31.7S 2~.~.-33.97 3.1~ 31.75 20 (`~ r ~s ~
I~IETRIC TABI,E I
As a specific exalllple of wllil~stock collhglllatioll collsider tllat t~le operatol is 25 cllttillg a 7~.59 cm [81/2nl Will~lOW all~l ~Ilillillg a llew well patll flolll 70.09 kg/lll 147 pounds pel footl 24.4.S clll [9%"1 casillg. Tlle ~leflectol Ilead mllst Illatcll tlle ID of tlle 24.45 cm [9%~1 casillg all~l its tool face lllllSt ll~atcll tlle 71.59 clll [8'/2"l willdow mill.
This deflectol wolll~l be Illolllltecl oll a Tyl~e 111 ~vllil)stock wllose back face will llave a culvatllleof71.~S9clll[81/2"lall~l~vl~osetoolfac~ewillllaveaclllvatllleof31.75cml17~/2"~
30 witll a tool slope allgle of 3.18~. Tllese ~lilllellsiolls ale givell rOI exalllple ol~ly alld are not to be collsideled a limitatioll oll tllis illvelltioll.
Tile deflector llead, sllowll ill Figllles 7A - 4D, mllst be size~l to fit tlle bole of tlle wellbole. Tlle ol~ject of tlle clellectol Ilea(l is to "sllove" tlle illitial win~low mill into tlle side of tlle l~ole. It llas l~eell llote~ tllat tlle illitial millillg opelatioll places sevele 35 wear oll tlle top sectioll of a wllil7stoc~k. Tlllls, tlle ~leflectol Ilead is made of llal~lelled steel witll ol~tiollal PCD (polyclystalille (liallloll~l - ill(lllstrial diamond) illselts in tlle face of the llead, 51. Tlle deflectol Ilea~l lellgtll, 58, lallges ill lellgtll flolll at~ollt 0.3 metels 2l79184 wo ss/23273 - 24 - r~l~O~Ys~o~s4 [I'] to abollt 0.61 Illetels 12'1; t~le act~lal lellgtll l)eillg detellllilled by tlle bole size. For example ill a 8.89 cm l31/2"] bole size, tlle llea~l sllo~ l be about 0.3 meters 11') loi1g;
whereas il1 a 3i.75 em [I21/2"l bole size tlle llea~l s~lollld be about 0.61 metels ~2'] lollg.
Tile baek of tlle defleetor head, 57, is sllape~l to Illatch tlle bole. Tllat is, tlle back of tlle s head will lie "flat" against tlle clllved sllrface of tlle bole. Tlle leadi}lg edge, 50, of tlle head is aibout 1.6 millill1etels ll/l6"1 tllick all~l lllatc~lles tlle bole at its baekside.
Startillg fiom tlle leadillg e~lge alld l~ illg ~lo~ll to tlle joillt, 52, betweell tlle defleetol head and the wilipstoek bo~ly, tlle tool faee slopes outwald flon1 its baek, forming a cllpped sllrface witll a tool face slol~e rangillg flolll abollt two degrees (7') to o abollt 4 degrees (4). Tlle aetllal tool faee slol~e will depelld oll tlle bole size, tlle defleetor llead lellgtll, alld tlle wllil~stoek l)ocly tool faee allgle. For example, tlle deflector llead wolll~l llave a tool face allgle cllosell to Illatcll tlle '.09 allgle follll~l ill tlle Type I wllipstock, tlle 2.67 allgle follll~l ill tlle Type 11 w~llpstock, alld tlle 3.18 angle found in tlle Type 111 wllipstoek.
As a specific example of deflectol Ilea(l collfigllratioll, if tlle opelator is cllttillg a 21.59 cm l81/2~l wil1I1ow al1~ illillg a l1ew well patll from 70.09 kg/ll1 1~7 po~lllds per foot] 24.45 cm [9%'~] casil1g, tllell tlle ~leflectol Ilea~l l)ack ~vo~ l lla~e clllvatllle to ll~atcll tlle ID of tlle 24.45 cln [9%"1 casillg, llall1ely ~7.05 cm ~8.681~1, tlle cleflectol Ilead tool face wollld llave 21.59 cnl l81/2"l clllvatllle witll a 3.18~ tool face slope al1gle alld tlle 20 lengtll wolll~l be jllst ovel 40.6~ c,ll 116"1. Agaill, it 11111st be lloted tllat tllese angles allcl .1:--,. ,.. ~",~ sllollld llot be takell as a lestlictioll oll tlle illvelltioll as tlley o~lly selve to give the l~est kl-owll tool face palall1elels as set by tlle bole collditions. If lalger or smaller bores al-e ill llse, tllese palall1etels wollld llave to be cllallged.
Tile deflectol Ileacl will l~e ll1al1l1factll1ecl ~IOl11 i3~0 steel or flol11 a l11atelial tllat ~5 has a sill1ilal llaldlless. Optiollal PCn illselts, 51, ale placed ill tlle stalldalcl pattelll to minimize wear and actllally eall lle eollsi~lele~l as aetillg as a bealillg sllrfaee fol tlle window ll1ill Teclllliqlles fol tlle illselti< ll of l~cn illselts all~l lleat tleatillg of llletal to maintain a givell llal~llless ale ~ell kllowll ill tlle alt all~l will llot be disellssed.
Tlle defleetol is attaelle~l to tll~ wllipstock bo~ly l)y pills, 53, pless-fitted illtO lloles, 30 54, in tlle wllipstock l)o~ly. As tlle ~leflectol Ilea~ ill sllffel collsi~lelal~le vil)latioll wllell tlle will~low Illill is oll it, a llllllli)el of pills will l~e llee~le~l alld l1lost likely tlle t~o sections will be welded to eacll otllel alollg ~lle l)ack jllllctioll gal~, 60 all~ . Tlle wel~l n1ust l)e grollll~l to ll1atell tlle l)ack clllvatllle of Ille ~leflectol Ilea~l. Figllle 4~ clearly 2~79~84 w0 95123273 -- 2 5 ~ D4 illustrates tlle deflector head attaclled to tlle wl~ipstock bocly w~ell tlle l1ead and tl~e body are of eqllal clllvat11le~ i.e. 8.89 Cltl ~3'/2"1 bo~ly to 8.89 cm ~31/2~l deflectol Ilead, 13.97 cm [51/2~] body to 13.97 cnl ~51/zUl deflectol head, ol ~0.3~ cn~ ir8~l body to 20.32 Clll 18~]
deflector llead. Figllre 4C al~d Figllle 3 illllstlate tlle lalgel ~ieflector OD wllen attaclled 5 to the smaller wl~ipstock bo(ly OD; i.e., a 31.7~S Clll ~ /2"l ~leflectol l~ead attaclled to the Type Ill or 20.32 cn1 18"] body.
A table of 1~ ed tlimP-lcit~-lc for tl1e tl~lee deflector lleads that the Wllip-Anchor systeln will requil-e is given below. Tlle la~lil1s of clllvatllle fol tlle backside of the variolls deflectol head is not given becallse tlle leqlli1ed la~lills will be set by tlle bole o ID in wl1icll tlle llead is being llsed. A pelsoll si;illed i11 tl1e alt of dlillillg wellboles call easilysllpplytl~ereqlliredradills1e1~lellll)elillgtllattllel-aciisi(lela~lillsofcll1vatl11en111st be chosell so t~at tlle backsi~le of tlle ~leflectol llea~l lests fillllly agaillst tlle bole. Tllis, of coulse, will leql1i1e a plope1 ra~ s of cl11~atl11e eql1al to tl1at of tlle ID of the bore and a culved co11e sl1ape acloss tlle top side of tlle deflectol llead. All of these t~s~lrl~ jt~llc are curlelltly placticed a11~l well kllowll. Tlle tal)le is given fol illustratioll only and is not intell~led to selve as a lin1itatio11 Ol1 tlle i11sta11t illve11tio1l~ As previollsly noted, tlle sizes (ol types) of wllil~sto~i; call l)e lllo~lifie~l to fit lalgel ol sl11allel bores than tllose presently discllsse~l.
DEFLECTOR llEAI) PAl~Al~lETERS
Wllli'-~N~'II()I~ tiloll~ ici;~2~ss 31 'I'yilc all~l 8i~ clll l)c~lcc Cl~ IIIICC~ II c I - 8.#~()1) 2.(~9 3i.93 1.27 ~51l - 13.97 01) 2.62 ~1.')1 1.91 111 - 2().3~ '.72 2.~ 1 I~IETRIC T.~31 E ' Tlle Settillg Tool Slot, 13. call l)e folll1~1 staltil1g at ol abollt S celltill1eters la couple of illcllesl below tlle denectol llea~l to wllipstock bo~ly joillt, 26. Tlle lelative pOsitioll of tlle settillg slot cal1 l)cst l~c see11 ill i~igllle 3. Tlle settillg tool slot is al~ollt - 254 cm ~1~1 wi~le ill tlle type I tool, al~ollt 3.~ l'/2~] wi~le ill tlle type ll tool, alld abollt 5.08 Clll 12"1 wi~le i11 tlle ty~)e lll tool. Tlle wi~ltl) is actllally determilled l)y 35 strellgtll of lllatelial considelatiolls l)ased ol~ tlle folce 1e~llliled to set a mt~t~ .lit-~l packer al1d by tlle letl ieval tool slot (tllese collsi~leratiol1s will l)e discl1ssed). Tlle setting slot llas a valiable del~tll ~lete11l1ille(l l-y tlle tool f~e a11gle. Tlle back of tlle setting tool WO 9~/Z3273 2 1 7 9 1 8 ~ r~
.

slot is pelpelldicular to tlle base of tlle wllil)stock al)d parallel to the back of tl3e whipstock; tlllls1 its variable (lel~tll as tlle slot colltilllles towalds tlle base of tl~e whipstock Tlle slot terminates above tl~e I~ l point of tlle whipstock. Tlle actual ., point, 25, is detel-milled l~y tlle type of whipstock (Type 1,11 or 111) and is 5 set by tlle plopelties of stlellgtll of Illatelials. T~le deptll of tlle slot at tlle bottom will range flolll abollt 1.27 cnl ll/2n~ ill tlle Type I tool to abollt ~.54 cnl [IU] in tlle Type Ill tool .
A ,~ dcd set of parametels is givell il~ the table below for the setting slots used in tlle thlee types of Wllil?-Allcllol systelll Tllese palallletels ale given to illustrate ,o the instant illvention an~l sllollld llot l~e collsi~leled as lilllitatiolls oll tl~e plesent inventioll If additional types of Wllil~-AIlcllol ale propose~l, tlle sanle collstlaints tl~at apply to tlle example table below ~ill yiel(l tlle le~ iled palallletels fol slllaller or large Whip-AIlcllol types.
SETTINC TOOI, rAR~ ETERS
....
Wllll'-ANC1101~ Slol- S~llil-gslol Illicl;llc~sl~- I)cllcc~iol~o~
Iypc ~--d Sl~.c I.. ~llglll, Wi~ 3cx .~ t l ~ g rOol I - 8.89 01~ 2.(19 365~ x 26~ x '.~)6 1.77 3.33 11 - 13.97 ~1) Z.67 J').~.~ x 2.')~ x 7.7') 1.9~
111 - 2~).32 01) 3.18 1~.7~ x 5.16 x 7.5~ 5./~8 I\IFTRIC T.~PI E 3 1ll tlle table above, tlle collllllll elltitle~l "Deflectioll of tlle Milling Tool" dellotes the distance tlle Wllip-AIlcllol Tool Face llas Illove~l tlle Will~low Mill into tlle casing (ol bore side wall ill all llncased llole). All~l tlle collllllll elltitled ''Tllicklless to Back of Tool"
is the distance measllred at tlle bottolll ol base, 25, of tl~e settillg slot flol~l tlle settillg slot face to tlle tool l)ack (tllis is sllowl~ as lellgtll (i~ ill a Illllllbel of Figllles) It sllolll~l be llotecl tllat all settillg slots sllo~ll(l el~(l al tlle settillg slot base, 25, at about 91~ cl~l 136'~1 flolll tlle tol) of tlle Wllil~-AI~cl~ol Tlle settillg slot lellgtll is lestricted bccallse tlle ll~illil-g tool Illllst l~e al)l~ lo flllcllllll (level) off of a sllloolll cl~pped face il~ ordel to plopelly glli(~e tl~e Illillillg ol)eratiol~ ol~ its deviate~l tlajectoly.
IAdditiol~al discllssiol~ on tlajectoly al~l)eals la~el ill tllis discllssiol~ l3s Tl~e settil~g slot also p~ovi~les Access to tlle letlieval slot, 17, wl~iCIl rlllls flolll tlle face of tlle settillg slol at all Ill)~al~l all~le al~l exits at tl~e back of tlle wllipstock body The letrieval slot is tlle sallle widtll as tl~e settillg slot al~l its bottol~l stalts flom abollt 3.81 cm ll~/2~l to 6.35 cm l~'/2lll al~o~e tl~e l~ottolll of tlle settillg slot e~ten~ lg llpwar~l Wo 9s/23273 2 1 7 9 ~ 8 ~ r ~ 4 . .

for abollt 25.4 n~ ^rs 110"1. Tl~ese Llilnellsiol~s clepel~l Oll tlle Type of Whip-Ancllor and will be discllssed alollg witl~ tl~e letlieval slot allcl its fllllctioll ill a latel pOItiOIl of tllis disCIlssioll. Sliglltly al)OVe tlle letlieVal tool 510t, 12, is tlle locatioll of the letlieval tool shear pill apeltllle oi n-e~ 27; tlle clloice beillg made by tlle particlllal s ~ -t being described. Tllis locatioll ol~elates ill .~ j ^tion witll the Retlieval Tool latclling systenl and its plllpose will be explailled latel.
An upper llydraulic passageway, 1~, is follll~l at tlle sacl(lle pOillt of tlle cllpped tool face slightly below the bottolll of tlle settlillg slot. Tllis ~ mns flom tlle saddle pOillt of the cllpped tool face to a 'cllt-a-way', ~, located ill the back of tlle o whipstock. Tlle ~ly~llalllic passageway is tlllea~le~l at botll ell~ls to accept a llydra~llic street-ell fittillg. T'ile 'cllt-a-way', ~, extell~ls flolll tlle llydlalllic passageway to tlle base of tlle wllil)stock below tlle llillge, ~. Tllese collll)ollellts opelate ill COlljllllCtiOII Witll a hydlalllic ancllor packel all~l selve to Coll~lllCt llydlalllic fllli~l f~olll a rllllllillg tool located on the dlill stling to the lly~llalllic allcllol I~ackel wllell olle is llsed witll the Wllip-s Anchor system. Tllis slll~systelll will l)e exl)laille~i latel.
Tlle llpper sectioll of tlle wllil~stock, 4, is llillged to tlle wllipstock base, 5, via allillge assellll)ly, G. Tlle llillge ass~lllllly is sllowll ill ~letail ill Figllles 5A tlllol lgll SC alld is similal to a pliOI alt llillge except tllat splillgs, ~5, llave beell added ill splillg openillgs, 83 tllrougll 8~ alld tlle llillge celltel is offset flolll tlle Wllip-AIlcllol center lille by abollt 20 I.9i cnl i3/4"1 towalcls tlle tool face. Tllese sl~lillgs selve to ellsllle tllat tlle wllipstock ~
fall away flolll tlle pOillt of deviatioll agaillst tlle back of tlle wellbole. Tllese splillgs ale similar to tllose folllld in "valve-liftels" llse(l ill ellQilles. Tlle sl~l illgs are retained ill tlleir ~o",l"~ d positioll wllile tlle wllil~stock is beillg Illalliplllate(l by a spl illg letainel sllear pin, 88. This pill is approxilllately ~.3~i 1lllll 1~/4"1 ill (liallletel an(l rlllls tlllollgll its ~s respective spling letailler slleal I~ill ol~ellillg ill tlle Ill~pel sectioll, ~6, alld base section, ~7, of tlle wllipstock. Tlle llpl~el sectioll opellillcP, ~)G, all(l ~)ase sectioll opelling, ~7, will ollly aligll wllell tlle splillgs ale collll~lesse~l all(i ~vllell tlle wllipstock is pell~ell(liclllar to its base. Tlle sprillg retaillel sllcal I~ill, 88, is llel(l ill place l~y two sllap rillgs, ~3, ill a sllal~ lillg gloove, 9;i, at eitllel ell(l ol Ille l~ 'illlill tlle l~ase ol~ellillg~ ~7. Tlle teclllli~ e 30 fol sllealillg tllis pi,l, wllell tll~ st-~(k is set. ~ e explaille(l lalel.
Tlle llppel all(l base sectiolls of tlle ~ stock are llillged togetllel Ilsillg a llillge pill, 87, WlliCIl passes tlllollgll tlle llillge pill opellillg, 81, ill tlle base, and tlllollgll tlle corlespolldillg llinge pill opellillg, 80 ill tlle Ill~l~el sectioll of tlle wllipstock. It sllollld be 2~7~8~
wo 9sl23273 , ~1/~.,,''~77C~

noted tllat tlle centel of tlle llillge pill is offset to\4alds tlle frollt of tlle wllipstock by abollt 1.91 cm [3/4"]; unlike t~le plesellt alt. Tllis offset assllles tllat tlle sprillg letailler sllear pin, 88, will sllear, wllellevel weigllt is al~plie~l ill tlle clownwald directioll oll tlle Whip-Ancllor, wllen it is set. Calefill o~)selvatioll of Figllle SB will sllow tllat a lalge s downward force will tend to pllSIl tlle llppel sectioll of tlle wllipstock backwards ol away from tlle tool face. Tllis is tlle dilectioll tllat tlle wl~ipstock mllst fall (or move towalds) in ordel for plopel hole deviatioll to occllr. Tlle dowllwal(l folce will pivot abollt the off-set llinge, 87, tlllls shealillg tlle splillg letaillillg pin, 88. Tl~is releases tlle llillge springs wllicll will llold tlle back of tlle wllil~stock against tlle wellbore. The back of tlle o hinge base, 8~, is sloped to asslll e tllat tlle llpl~el Ilillge sectioll 82, is llot plollibited flom its backwald Il1otioll wllile sllealillg Ille Splillg letaillel slleal l~ill, 88. 11l a silllilar mallllel tlle top of tlle back of tl~e llillge base, ~0, is also slope~l to avoi(l ally cllallce of interference .
The splillg folce featllle ~ill fill~ gleat lltility ill llear veltical lloles (witllill +5 s of vertical) and in lloles wllele tlle ol)elatol ~islles to deviate flolll tlle low si~le of the wellbole. Deviatiol~ flolll tlle 10~4 si~le is sel~lolll l~elfolllle~l becallse of tlle lligll failllre rate tllat Illost opelatols llave exl~eliellce~l.
Tlle base sectioll of tlle ~vllipstock colltil~lles tlle 'cllt-a-way', ~, wllicll is designed to l~old a lligll plessllle llylllalllic lille fol Ilse ~Yitll a llydlalllic packel. Tlle 'cllt-a-way', 20 9, terll1il1ates ill a anotller llydlalllic fllli~ assaQeway, 23. Tl~is l,d~..6..~ay lulls frolll tlle cut-a-way, ~, il1 tlle base sectioll, tlllollgll tlle celltel of tlle base, all~l tellllillates ill tlle bottoln flallge of tlle base wllele it call colll~llllllicate witl~ a lly(llalllic l)ackel, 1~111, t~lrollgll a closs-ovel sllb, IS. Tlle base lly~llalllic l)a~ 6..~ay, 23, llas tllleads fol a street-ell conllectioll wllele it ellters tlle 'c~lt-a-~vay', ~. Tlle actllal llydralllic pllllllbing 25 Will be explailled latel.
11l tlle pliol alt of settillg Wllil~stocks, it was gellelally accepted tllat tlle OD or prohle, _9, of tlle Wllipstocks SllOIII~l llave all apploxilllate clealallce of, ol sliglltly Illole than, 1.~7 cm ['/2nl witllin tlle wellbole. It is l~ossil~le ill sl)ecial sitllatiolls, wllele tlle wellbole is ill vely "good coll~litioll", to le~lllce tllis clealallce to 6.35 1111l1 1~/4"1. Tllis 30 irlvention llas tlllee sizes of ~ stock l~o(lies to fit l)ole sizes floll~ 9.~3 clll ~33/4nl to 31.75 cm ~ /2"] ID. Tlllls, fol ex,llll~ . ill a ~elll)ole llSillg 89.~ kg/lll 160 pOllllllS l~el footl casillg llavillg all ID of 31.7. ~ 2''l. tlle coll-ect Wllil~-AIlcllol ~olll~ e tlle Type 111, ~llicll llas a l~o~ly OD or '(~.3~ C~ tS"I. Artel tile Wllil~-AIlcll~ as allcllole~l w09sl23273 21 7q 184 r~
.

(centered) ill tl~e 31 75 cm l1~'/2"l IDwelll)ole, tl~ele wollld l)e a 5 7~ cln [21/4"l clearal~ce or gap betweell tlle 3~0 38 Clll IS"I OD Wllip-AIlcllol body all~l tlle 31 75 cn~ [111/2"] ID
wellbole Depelldil~g ol~ tlle ~leglee of il~clilla~ioll ill tlle welll)ole to be sidetracked and tl~e dil ectiol~ of tl~e il~tel~ded sicietl ack, all Ol~tiollal Spacel, 8, I~-ay be l eqtliled to redllce s this clearance (gap) to a n~ of 'i ~7 cll~ I'/2"l il~ tl~e directiol~ of tlle intended sidetrack This example is givell fol illllstlatioll ollly al~d optional spacer requirements for given wellboles cal~ easily be calclllated llsillg kl~owl~ art The dlill stling has a flllcrlln~ effect cleated by tl~e l~ g/dlil~illg tool and tlle watermelol~ mill(s) wllellevei it is ~leflecte~l (ol cleviatecl) to tlle "I~igll sicle" of a welll)ore o having some degree of illclinatioll flolll veltical Tlllls, as tlle willdow milling operatioll proceeds, tlle dli~l stlillg acts as a level to folce tlle ~ lOW Illill illtO tlle casing (or wall of an Illlcased llole) Illldel tlle g~ lallce of tlle Deflector Ilead all~i sllbseclllellt tlavel alollg tlle Tool Face of tlle Wllil~-AIlcllol bocly Ollce tlle illitial Cllt illtO tlle si~le of tlle wellbole llas beell nlade alld ollce tlle Illills llave Illove(l alollg tlle Tool Face of tlle 15 Whip-Ancllor, tlley llave folll~ecl a "lille of tlajectoly" e~ al to (ol Illole tllall) tlle deglee of slope placed oll tlle Tool Face of tlle Wl~ -AIlcllol W~el~ tl~e willdow l~ill reaclles tlle bottoln of tlle Tool Face, it will l~ave mille(l l~ea~ly all tlle casillg ~vall (ol side of an uncased hole) Tlle watermeloll ll~ill(s) will still be oll tl~e Tool Face of the Whip-Ancl~or, givil~g guidallce alld ''flllcl~llllillg'' tlle v~illdow ll~ill away floll~ tlle old wellbore ~o 11~ tlle illstallt illvelltio~l, it Illay be llecessary to llse all optional spacer at tlle base of tlle Wllip AIlcllol Tool Face wllelleve~ tl~e gal~ I)etweell tlle wellbole and tl~e Wllip-Ancllor bociy excee~s ~ ~4 Cl~ all(l tlle Wllil)-AllCI~OI Systelll is heillg llsed ill a wellbore Witll less tllall ~0 ~leglees of illclillatioll Tlle lligllel tlle deglee of inclillation from veltical ill a welll~ole, tlle Illole l~lol~ollllce~i tl~e ''flllcllllll effect'' alld tlle spacer is Zl not necessaly It Illigllt l)e llotecd, tllat as tlle tol) of tl)e Wllip-AIlcllol lests against tlle 31 75 cn~ ¦171/2"l wellbole, tl~e "tlaject~ ly l~atll" cleale~l I)y tlle ''0 3~ Cll~ "¦ OD Wllip-Anchor Tool Face il~cleases flolll 3 i~ ~leglces to 4 07 ~Icglees Tllis inclease ill deviatioll flolll tlle ol~ welll)ole fllltllel cllllallccs tlle Illovelllellt of tlle llew patll away floll~ tl~e old welll)ole Figllles ()A allcl ol3 gi~c gleater ~letails oll tlle optiol~al space 30 and its attacl)l)~ellt tO tlle Wllil~-Al~CI101 I)o~ly to extell~l tlle Tool Face an(l lessell tlle gap (In general, all illllstlatiolls of tlle Wllil)-Allcllol systelll wllicll llse a llydlalllic packer ale sllowl~ witll tllis optiollal spacel: see fol exalllple Figllle ~ ) 11l ~lesigl~ing tl~is Wl~ip-Ancbor syste~ll, tlle l)ottoll~ ol base, ~5, of tll~ settillg slot sllo~ l l)e located above tlle Wo 951_s273 2 ~ 7 9 1 8 4 r~

fulcrunl poillt for tlle watermelol~ mills. If ~llis is l~ot dol~e, tl~en special watermelon mills nnllst be llsed wl~icl~ do not bit il~to tlle settil~g slot wl~e~ se.
The optional spacer, 8, is attacl~e~l to tlle lower poltion of tl~e llpper sectiol~ of the Wl~ip-AI~cl~or by two (or l~lole if le~lllile~l) stll~ls, 7~. The tool face side of tlle spacer, 72, is a contilluatiol~ of tl~e Wllip-AI~cl~or Tool Face, 11. As a . .~ e, tlle tool face of the optional spacer will llave tlle salIIe slope and cllppilIg as tlle type (size~
Whip-Ancllor body to wl~icl~ it is attaclle~. Tlle t~vo st~,ds, 7~ pass tl~lollgll apertllles ill the optional spacer, 75, alId illto tllreaded ol~ellillgs, 68 wlliclI ale in the Whip-Ancl~or body. The back of tl~e spacer l~as tl~e sal--e clllvatllre as tl~e body OD of tl~e type of Whip-Ancl~ol to wl~iclI it is beillg attaclled. T~le wi~ltll of tlle optiol~al spacel, 7~, will be tl~e sanle as tlle widtll of tl~e IllIl~el sectiol~ of tl~e Wllip-AIlcl~or al~d tl~e lengt~ of t~e space~, 78, will be set by tlle Wllil~-AI~cl~ol tyl~e (size). Tlle optiol~al spacel deptll, 77, and tl~e spacer base lellgtl~, 7~" ~vill l~e set by palalIIetels to be ~letermil~ed by tl~e Wllip-Ancl~or type (size) alId bore llole dialIIetel.
OrTlONAI. SPACER PARAI~IETERS
..
Wl~ slocl: C~sil~ S;~L~ 13-)rc Si~ S~ cr (`urvc 1~ L~CC
'I`yp- Si~,L cl~ 1 I)ci)lll 13:1ck (`u~ Slol)c o 18.X9 ~ ().X3 ') ~.~- l 1 .~3 0 NA NA ~I NA
8.89 Il.j3-l(,.~.t ~ 7-13.')7 1.27 8.8'~ 13.97 L~l 2.09 3.97 17.7X-21.'JI l~ -17.7X 0 NA NA L~l NA
3.97 i7.7X-21.U,l I~.t~-~().32 1.~9 13.97 2(~.32 Dl 2.62 20.32 24.~5-33.97 2(~.96-7s.~(~ () NA NA r~t NA
20.32 2~ s-33.97 25.11~-77.U,~ 2.s~ 70.32 31.75 ~ 3.1~
11120.32 2~.~s-33.97 29.~1-31.75 4.~s 70.32 31.7s ~1l 3.18 I~lETRiC T.~131.E -t Tl~e table above gives al~l~loxil~a~e (lillIel~siolls fol colIII~lollly llsed wellbo~es al~d col~ditiol~s. Tl~e tal~le is l~ol il~tell(le(l to sel~e as a lil~Iitatiol~ oll tllis disclosllre bllt is offe~ed ol~ly as illllstlatiol~ al~(i glli(lal~ce fol tl~ose skille(l il~ tlle alt. Rel~-elIIber tl~at a 35 spacer is ~IOt gel~erally l~ecessal~ al~d tl~e ol~tiol-al spacer will filId its greatest use wl~elIever tlle welll~ole is witllill 10 (leglees of ~!ellical alI(I wllel~ tl~ gal~ I~etweel~ tl~e centeled (set) wllipstock bo(ly al~(l tl~e welll~ole e~cee(ls abollt ~ cel~tillIeters i'l"~.
Tlle base of tl~e wl~il)stock, i, is attaclle(l to a closs-over sllb, 15, wllicll ill tlllll is attache~l to a mecllallical packel, 1~1~1. Tlle l~ackel tllat is sl~owl~ Figllle 1 is a vel~
.lo old style called a "set-(lowll" paciiel-. Tllis l~ckel is sllo~vll fo, illllsllatioll al~(l ease of W09sJ23273 2 ~ 7 ~ r~ 44 ;.." ollly alld is not col1sideled to be a limitatioll ol~ tlle invention. Tllisinventioll is desiglled to be llse~7 witll ally st~le of ~11rr~ ir~1 (ol llydralllic) allcllor packer.
Tlle instant illventioil can leadily be adapted for llse witll a llydlalllic packer as 5 shown in Figllre 2. Tlle exact sallle wllipstock is llsecl except fol additional plllll1bing features. A hydralllic street-ell, 20, is sclewed illto tlle matcl1illg tllreads witllin the Uppel hydralllic paa~.g.v~a,~ , ill tlle face of tlle wllil~stock. 11l a similar mallller anotller hydlalllic stleet-ell, 21, is sclewed il1to tlle backside elltiy of tlle sall1e llpper hydraulic ~/a~ 5~ y~ 19. Fillal~y a fllltllel llycllalllic stleet-ell, 22, is screwed into tlle 10 base hydralllic ~.a:,~..g..~ . A lligll plessllle llycllalllic llose, 2~, is attaclled betweell tlle two street-ells located ill tlle 'cllt-a-way', 9, ill tlle backsicle of tlle wllipstock. Standard hydralllic packel plocedllres ale llow follo\vecl. A closs-ovel sllb, 15, is sclewed ol1to tlle wllipstock followed by a llydralllic packel, 1~11. A llycllalllic collllectioll is n1ade betweell the face stleet-ell, 20, alld tlle settillg tool. Tllis l1alt of tlle il1vel1tioll alld l~locedllre will s be explained later.
Tl1lls, olle Illo~iel of Wllil~-AIlcllol Systell1 llsillg tlllee sizes of wllipstock body ca selve as a wllil~stock/packer assell1bly ill welll~ol-es flolll 8.89 cll1 [31/2"] to 31.75 Clll [12l/2"~
alld tlle sallle olle Illodel call be llsecl witll Illecllallical ol l1y~71alllic packels. As will be explailled in a latter part of tlle disc~lssiol1, tllis Wllip-AIlc11ol is letlievable.
AttelltiOIl sllOllld llO~V l)e clilecte(l to tlle Settillg Tool illllstlated ill Figllles 7 thlollgll 10. It sllolll(l be lell1ell11~ele(1 tllnt tlle sallle settillg tool will opelate a mrrll~nir~l ol lly~llalllic packel llsed ill colljllllctioll witll tlle illstallt illvelltion. Tlle genelal settillg tool will l~e ~esclibe~l filst all(l tllell tlle llecessaly cllallges tllat nlake it a mrr7~nir~1 or llydlalllic Wllil~-AIlcllol settillg tool will be desclibed. Tllere ale tlllee 25 diffelellt sizes of settillg tool becallse tllele ale tlllee diffelellt sizes (ol types) of Wllip-Atlcllol. Tlle settillg slot, 12, is ~7etel111ille(l by stlellgtll of Illaterial alld leqlliles set by tlle size of tlle tool all(l tlle pllll tllat \~ill be le~ ile(l to retlieve tlle tool. Tlllls, tlle slot widtll valies flolll abollt '-~.51 cll1 ~ rOl tlle Tyl~ I tool, to abollt 3.81 cll1 111/2"l fol tlle Type 11 tool, all(l tO al~olll 15.0~ Clll 1~"1 t~ l tll~ ~i-ype 111 tool. It sllolll(l be lloted tllat 30 otllel sizes of Wllil?-Allcllol colll(l l~e llse(7 all(l tlle settil1g slot wi(l~ll will still be deterlllilledbysimilarstrellgtl1ofIllatelialcollsi(lelatioll;tlllls,tllisexamplewidtllsllollld not be constllled as a limitatiol1 ol1 tlle illstalit illvelltiol1. 11l a sill1ilar mallllel tlle lel1gtl1 of tlle tool, 109, as measllle~l flol11 tlle slll~ (\, to tlle l~ottoll1 face of tlle settil1g tool, wo 95/23273 2 ~ 7 ~ ~ 8 4 ~ 7C., 108, will valy witll tl~e Wllip-AI~cllol tyl~e.
Tlle settillg tool, 2, collsists of tlllee slll~assellll~lies, wllicll ale best illllstlated i Figure 7 or 8, tllese beil~g:
tlle settillg tool lectallglllar bal, 101;
the setting tool flllid line or tllblllal, 10~; and tlle settillg tool sllb, 100, oftell callecl tlle top sllb.
T'i~e rectanglllar bar fits witl~ tlle settillg tool slot, 13, locate~ tlle face of tlle whipstock as pleviollsly discllsse~l. 11l tlle l~lefelle(l ell1bo~ ellt of tlle settillg tool tlle Quid line or tllblllal, 102, is tllleade~l illto tlle top sllb as sllowll ill Figllre ~OA. Tl~e o threads can be back welcle~l if desile(l. Tlle Qlli~l lille ol tllblllal is capal)le of safely carlying circlllatioll ml,d 0, Ilydlalllic n.,i~l Illl~lel plessllle. Tlle bal is welded to tlle setting tool Qllid lille ol tllblllar, Iû7, all~ l tlllll to tlle top slll~, 100, \vllicll is capal~le of connectioll to tlle dlill stlillg. It is possible to weld tlle tlll~lllar dilectly illto a lecess in the top sllb Witllollt llsing tlllea~le~l fittillgs: llowevel, tllleaded fittillgs wollld make ~s constl llctioll of tlle settillg tool easiel . Figlll e 9A illllstl ates a cl oss-sectiollal view of tlle setting tool, 2, witllill tlle settillg slot, 13.
Tlle peltillent ~letails of tlle settillg tool ~vill be discllssed. Tlllll Ilow to Figllle 9, whicll sllows a close up view of tlle tool ill tl~e settillg slot all~l at tlle base of tlle setting slot and to Figll~es IOA tllrollgll lOD, wllicll sllow collstrllctioil of tlle tool. Tlle bottolll 20 face of tlle setting tool, 108, llas a sligllt allgle, IOG, WlliC~I Illealls tllat tlle settillg tool bottom lests oll tlle settillg slot bottolll of tlle \~ stock at tlle poillt faltllest away flo tlle tool face. Tllele will be a sliA~llt gal~ l~etweell tlle settillg tool bottolll face, 108, alld the setting slot bottom, 25, llealest tl~e wllipstoclc tool face, I l . Tllis gap is on the order of several llulldledtlls of a Illillillletel Iseveral tllollsalldtlls of all illclll alld its pllrpose ~s will be described latel. Tlle settillg flllid lille ol tllblllal, 102, tellllillates at a point slightly below tlle tellllillatioll of tlle bal. Tlle actllal distallce is not clitical becallse it is used to allow fol ease of attaclllllellt of a lly~llalllic fittillg. Tlle illsi~le of tlle ol~ell elld, 107, of tlle flllid lille is tlllea~ l to accel~t a lly~llalllic fittillg. Tlle settillg tool is attaclled to tlle Wllill-Allcllol l~y a slle.ll pill~ 3'). l-llis slleal I~ill is tlle sallle as llse~l ill 30 tlle alt fol cllllelltly settillg wllil~stocks; llowevel, it is score~i to assllle pelfect flactllle.
Tlle sllear pill, 39, is Illa~le of mil~l steel alld is tllleac'ied to fit tlle tllleaded apeltllle, 105, ill tlle settillg tool. Tlle slleal pill passes tlllollgll a coll~a~JollJillg apeltll~e, 67, ill t~le ~llil~stock. Tllis ~ ellillg is lalgel tllall tlle slleal l~ill all~l allows fo, wo 9sl23273 2 ~ 7 9 1 a 4 r ~ 1 / IJ ~ 7 7 C.~
slight n1ovement of tlle sllear l~ill witllill tllat opellillg. Tllis is to give tlle sllear pill sonle relaxatioll flolll any appiied dowllwal~l Ol tolsiollal folces exeltcd by tlle Setting Tool ill reaction to forces applied to tlle ~llill stlillg. Tllis allows tlle dowllwald force to be applied directly to tlle bottonl of the settillg slot alld tl~e tolsiollal forces to ~e directly s applied to tlle side walls of tlle settillg slot. A~lclitiollally, tllis loose fit of the sllear pin, 39, in tlle wllipstock apertllre, 6~, ellsllles tllat if sllfficiellt dowllwald force is applied oll the settillg tool, then the bottolll face of tlle settillg tool will flllly set dowll Oll t~le bottom of the setting slot. Tllis action will ill1palt a shear folce to tlle spring retainillg shear pin, 88, becallse of tl~e colllbillatiol~ of tlle of Fset l1illge, 6, alld tl~e bottom tool face o angle, 106, Oll the settillg tool.
It sllollld be lloted tllat if tlle sl~lillg letaillel pill, 88, is slleale~l wllile tlle Wllip-Ancllol is beillg llln illto tlle welll)ole, tlle llillge sectioll of tlle illstallt illventioll reverts back to tlle pliol alt ell1ployecl by cllllellt wl~ stock/packel systellls llsillg an unpilllled llinge. Tllis col~ditiol~, wl~icll colllcl l~e ~lollgl~t al~ollt by llavillg to folce tlle wllipstock 15 through a palticlllally tortllolls patll alld llavillg to exelt a gleat amollllt of downward force on tlle setting tool, does llot callse ally plolllellls ill llsillg tlle illstallt device. Tllis is becallse tlle base of tlle allcllol I~ac~el llas a lalgel OD tllall tlle slips (wedges ol scaling) elemellts section of tlle packel allcl fllltllel lllore is "bllllet sllaped.'' (See Figllle 3) The illstallt illvelltioll will ol~elate bettel tll~ll tl~e l~liol alt ill a toltllolls patll for two ~o reasons:
a) a gleat an1ollllt of do~vll~i~arcl folce (oF ~eigllt) call l~e al~plied witllout any feal of sllearillg tlle slleal l~ ecallse tlle folce is apl~liecl dilectly to tlle Wllip-Ancllor via tlle settillg tool sittillg ill tlle bottolll of tlle settil1g slot, alld b) becallse tlle Wllil~-AIlcllol call l~e lotatecl witllollt feal of sllealillg tlle slleal pill dlle becallSe tlle tolsiOllal folCe (I'otatioll) is applied dilectly to tlle walls of tlle settillg slot.
Additiollally tlle slleal i~ill llas a gloove, 381 cllt axially arolllld tlle pill at sllcll a locatioll so tllat wllell tlle i~ill is illstallecl tlle gloo~e is locatecl sliglltly illside tlle settillg slot face. Tllis groove assllles tllat tll~ slleal l~ ill slleal at tlle gloove. Tllis Illealls 30 tllat, ollCe tlle pill llas slleale~l, tllcle ~ e llo lllatelial extellclillg flolll tlle wllil~stock sheal pill al~eltllle, 6~1 illto tlle settillg~ slot. l~lle l~ac~k of tlle ~llil~stock llas a lecess, 63, WlliCIl accel~ts tlle Allell Cap Ileacl of tll~ slleal l~ill all~l assllres tllat llo matelial extellds beyolld tlle back si~le of tlle wllil)stock. Tlle lecess, G3, llas all axial gloovel 6~, wllicll wo 9~/23273 _ 3 4 can accept a keeper rillg 37 Wllicll will keel~ e Allen Cap I Jead witllin tlle body of tlle Wllip-AIlcllor after it is sheale~l. Ally tyl~e of letaillel -le~ l. s~lcll as weldillg collld be employed. Tlle tal~le givel~ below is fol I)llIposes of illllstratioll of tlle best n~ode. It should not be constrlled as a limitatioll. All ~ -ci~ will be set by stlength ofs n1aterial consideratiolls; thlls if tlle matelial cllallges ol if a weaklless shows up a metallllrgical engilleer wollld kllow llow to acljllst tlle vallles given below.SIIEAR STUr~ PLACEI~IENT AND SErrlNG SLOT I~ASE PARA~1ETERS
Wl~ SIock Slud Sl.~t Sll,l Sl~ ro~ ts~ Slod ~o Si~c Size Wi~ ltl~ tll .,r s~ >
1.~7 2.67 Z.~fi 56 52 2 5-1 0.95 9 ~.#~) 7 z7 ~ 3.~ 7 . ,, . .. 1.91 I\I El RIC ~ 5 Wl~en tlle settillg tool 2 is llse(l witll a l~lecllal~ical l~ackel tlle setlillg tool flllid e 102 is lefl opell as sl~owl~ Figllle 7. Mlt(l catl be cilclllated tlllollgll tllis filli(l lille z0 and if all MWD tool is attaclle(l to tlle set~illg tool sllb plol~el Wllil~-AIlcllol tool face orientatioll Illay be accoml~lislle(l. If tlle ol-elatol Ieqlliles tlle filli(l lille 102 call be attaclled to cilclllate tlllollgll a Illecllallical allcllol-packer witll a clleck valve to be a~le to wasll to bottom ill opell (Illlcase(l) llole coll(liliolls~ (Tllis allallgelllellt is not sllowll and wollld llot ill1pair tlle operatiol1 of tlle Wllil~-AIlcilol. Tlle allal~gen1ent wotlld llse zs all of tlle desclibed llydralllic allcllol I~ackillg l~llltl1l)illg an(i tlle Il1lld wollld cilclllate in t~le same patll down tlllollgll tlle Closs-ovel slll) all~l ollt of tlle l~ottoll1 of tlle m~rl~ i packer.) Figllle 8 shows the allallgelllellt of tlle setting tool wllell it is llsed to set a llydlalllic packel. If tlle settillg tool is llse~ itll a llydlalllic packel tllell a lly(llalllic 30 hose 113S wollld l)e attaclle(l to tlll~illg at flle Illleaded open end 107 alld l-lln to tlle eqllivalellt llydralllic fittil1g 20 oll tlle clll~pe(l face of tlle Wllil~-AIlcllol. Tlle plocedllles (or metllods) for llsillg tllis settillg lool witll eilllel tlle lly(llalllic or Illt ~ l packe will be discllssed latel. It sllolll~l I)e llote~l tllat tlle Wllip-AIlcll~l is illllstlated ill Fig 8 as beillg conllected to a lalgel I~ackel via tlle closs-over sllb 15. Tlle ol)tiollal space 35 8 is also showll; l1owever tlle lly~llalllic fittillgs all~l llose witllill tlle wllipstock llave bee omitted fol clality. A(l~litiollal illllstlaliolls Illay l~e folllld ill rigllles 16 tlllollgll 1!).
All altelllate ellll~odilllellt of tllt settillg tool is sllo~ll ill Figllle 10C allcl 10D.
In tllis ellll~o~lilllellt~ tlle steel fllticl liltt ol tltl)tllal 102 llas L)eell lel~lace(l witll a llit~lt w09s/23273 2 ~ 79 i 84 ~ c~

pressllle hydlalllic llose, 113L, wllicll lllns ~lilectly flolll tlle t~lleaded tllblllar recess, 11~, on tlle top sub, lOO, to tlle stleet-ell fittillg, ~0, oll tlle Wllip-AIlc~lol tool face. Tllis llose wollld be lleld in place by staillless steel clall~l~s~ 114, all(l sclews (llot sllowll) sclewed into the settillg bal as lleeded. 11l fact, as pleviollsly Illelltiolled, tlle salne hydraulic flllid s lines call be llsed ill conjllllctioll witll a Illecllallicai packel to wasll tlle bottom of tlle hole witll dlillillg mlld ill opel- Ilole (Illlcase(l) col~ditiolls, otllelwise, wllen using a mP~ fl packer, eitller valiallt of tlle lly~llalllic llose, 113, wollld be omitted.
A table givillg a~).uAi..ldle dimellsiolls Fol tlle tlllee tools is given below. Tllese 1; "~io, ~ sllould not be constllled as a lilllitatioll oll tlle illvelltioll, nor sllollld tlle fact o tllat ollly tlllee sizes are givell l)e silllilally collstl ~le(l, fol tlle leasolls givell ealliel ill tllis discussion of tlle invelltioll. Tl~e tal~le is fol illllstlatioll ollly all~l allows a persoll skilled in alt of ~vllil,~lc,~k3 to clloose tlle l~lol~el tool(s) fol tlle plopel applicatioll.
ADDITIONAI, SETTING TOOL PARAl\fETERS
Wllit~slock Iyl~c l~llr 'l~ >Il Sl~ Sllc~r SIu~l or Si~c L~llglll, Wi~ , I)cl)lll Si~c - l~ lB ,~ lCCli.~ Si~c ~_ ,, . . -, . , ~:
- 8.~9 01) I()l.Gt~ x æ54 x 2.~ ].6~ 72 Al 33/3" ~! 23~3"11~ .27 Il - 13.97 01) 10l.6() x 3.81 x 3.1t3 1.~ 72 A l ~3/~ / 3~/2"l~ 1 .59 20111 -20.3201) 1~1.6()x~.t)~x3.8~ 7~AI ()'~3~ /2NIl:l~ 1.9 I~IETI~IC TAI~I,E 6 ~ N-~ clric cquiv~lclll Tlle retlieval tool fol tlle Wllip-AIlcllol is desigllecl to engage a letrieval slot 25 located in tlle llppel poltioll of tlle wllipstock witllill tlle settillg slot. Figllres l IA-B and 12A-D sllow tl~e palticlllals lleeclecl to Illl~lelstalld tlle ~levice. Tlle plefelled embodimellt for the letlieval tool is sllowll ill Figllle 12A, witll (I closs-sectioll in Figllle 12AA. Tlle plefelled embo~lilllellt llses a lly~ilalllic llose to l~ass fllli(l to tlle wasll polt, located in tlle face of tlle llook ill tlle letl ie~al tool. Tlle altel llate embodiment is sllown 30 ill Figllle I~B, witll a closs-sectioll sllowll ill Figlllc I~BB. Tllc altelllate llses a wel(led tllblllal ill place of tlle lly(llalllic~ llosc, wllicll \vill illclease tlle stlellgtll of tlle tool and will be tlle Illost llseflll fol Tyl~e 111~ -Allcll-)ls. Ally lellieval tool Illllsl llol cxceed tlle (liallletcl of tllc Wllil~-AIlcllol l~o(l)~ (I)olc)~ ;1ll(l tlle tool Illllst l)e al~le to willls~,ll)~l tl)lee tillles tllc folce le~lllile~l to l~ se tlle .Ill~llol-l~ackel at tlle l~ase of tlle Wl~ip-~s Allcllol.
Tlle pleferled ellll~oclilllellt \vil~ l gleatcst llse witll Type I alld Type 11 Wllip-Allcllols becallse tlle ID of tlle l~ole llole lilllits tlle size of tlle Retlieval Tool. Tlllllillg tllell to Figllle i~A, tlle Retlie~al Tool sillll~ly collsists of a tool jOillt, 180, a bal-, 178, wo ss/23273 2 1 7 9 ~ 8 4 and a specially shaped hook, 177. Altl~ollgll tlle llook co~ l l)e welded to the bar, it is mucll bettel to ~ f~tllle tl~e llook alld bal as a Illlit becal~se oFtlle tlelllendolis forces orweight tllat tlle Retlieval Tool will llave to el~ le in leleasillg tlle anchor packer (not shown). Tlle tool joint, ri80, can llave a tlllea~led fittillg ol a weld fittillg for I~t5~ n1Pn~
s to otllel Bottoln Hole Asselllbly (BIIA) tools, sllcll as tlle piston sleeve valve assen~bly or sub, 140, sllown in Figllre ]~C al~d wl~icll will be ~iiscllssed sllortly. Tlle tool jOillt is attacl1ed to tlle Retlieval Tool bal, 178, all~l to tlle llook, 177, eitllel dlllillg Illanllfactllre of the Retrieval Tool as a col~ lete III~it ol I~y wel~ g tlle bal to tlle tool joillt. ~The pleference is fol a con1plete illteglal llllit ~Ille to, again, tlle tlemendolls folces that will o plesent.] Tilele is a lecess, 17~, \vllose del~tl~, iG8, is set ~y tlle type of Wllip-Ancllor being llsed. Tlle recess pern1its tlle Retl ieval Tool to celltlalize itself il~ tlle settillg slot, 13, of tlle Wllip-AIlcllor, tlllls, tlle ~leptll, 1~8, will valy witll tool type. Tlle l-etl ieval tool latching n1ecllallisn1, 28, is locate~l oll tlle face of tlle bal (at location 27) tllat will ellgage the retrieval slot. Tllis mecllallisll1 all~l its ell1l)o~limellts will be ~liscllssed latel.
s Tlle llook, 177, llas a wasll polt, 175, locate~l ill its face. Tlle wasll polt, 175, connects dilectly to a wasll passai~eway, 17G, ~ icll is cllt tlllollgll tlle centel of tlle llook, tlll-ollgll tlle bal, all~l ~elll1illates ill a tlllea~le~l olltlet at tlle back (opposite tlle tool face) of the bar. A llydlalllic stleet-ell, 18S, is fitte~l ill tllis back opelling of tlle wasll passage and a hydralllic l~ose, 183, llllls floll1 tlle stleet-ell to a tllleaded polt, 18~, in tlle tool 20 joint. T'ile tllleaded polt, 182, collllects to tlle illsi~le of tlle tool joillt via a flllid passageway, 181. Tlle lly~lralllic llose, 183, is stlal~l~e~l to tlle l)ack of tlle bal, 178, I)y staillless steel clall1ps, 18~, wllicll ale ill tlllll, attaclle~l to tlle bal, 178, by staillless steel screws (not sllowll). All ad~litiollal pie~e of Illetal, 1~0, is wel~led to tlle L~ack of tlle bal, by weld, 205, to plotect tlle stleet-ell, 185. It wolll~ be possil)le to follll tlle plotectol zs plate, 1~0, as a part of tlle collll~lete Retl ie~al Tool, wllile manllfact~lrillg tl1e bar/llook/tool joillt.
Tlle wasll polt, 175, is ~lesiglle~l to s~val) tlle wellbole all~l tlle settillg/letrieval slots, 12 alld 13, as tlle letlieval tool is Illaliil1g its tlil~ illtO tlle welll)ore. It is lealized tllat dlllillg leglllal ~llillillg ol)cl.~tiolls~ ol~illg a ~leviate~l llole, cllttillgs (follllatio 30 cllips) Will settle ill all cle~ ices witllill tlle Wllil~-AIl~llol . Tlllls tlle settillg slot, 13, wllicl acts as a glli~le for tlle Retlieval Tool llook, as ~vell as tlle actllal letlieval slot, collld becon1e filled Witll cllttillgs. Higll l~lessllle n1lld flow will wasll tllose c~lttings free of tllese critical slots.

2t79~84 WO 95r23273 1 Tlle Retlieval Tool l~ook is calef~lly sl~al~e(~ to accolllplisll seve~al ends. Viewed froln tlle bottoll~, as ill Fig~lle 17AA, tlle flollt of tlle llook is sliglltly llallowel, 165, Illall the body of tlle llook, wllicll llas tlle sallle wi~ltll, lfi6, as tlle Retlieval Tool bar, 178.
Furthelmole, whell viewed ell~l ol- as ill Figllle I~D, it call be seen tllat tlle width of the 5 top of the llook, 164, is sliglltly llal lowel tllall tlle widtll of tlle flollt of the bottom of the hook, 165, wllich widells to tlle wi~ltll of tlle bal, 166. Tlle Retlieval Tool hook is set at an angle of 35 degrees to tlle Retlieval Tool bal alld all lea~lillg edges are loullded for ease of e"~ 6..,~ t into tl~e letlieval slot, 17. All dilllellsions of tlle Retlieval Tool hook, bar, setting slot and letlieval slot ale set l)y strellgtll of Illaterial co~lsideratiolls and o a representative set is given ill table 7 below. Tllele l~ st be sllfficient strength for the hook to oll pllll tlle Wllil)-AIlcllol all~l bleak tlle lower allcl~or packel loose, plus be able to pllll tlle Wllip-AIlcllol assellll)ly flolll tlle llole \~itllo~lt Illaterial failllle. Tlllls, tllese din-PI-~irll~c cllallge witll tlle size of tlle Wllip-AIlcllol. Tlle tables of dil -CI~SiO,~s give best mode dillleilsiolls fol accolllplisllillg tllis plllllose; llowevel, willl tlle llse of diffelellt s steels,the~limencir~ccollldcllallgealldalerea~lilycalclllateclbyllletalllllgicalengilleels~
A suggested set of parallletels is givell ill tlle table below; tllese parallleters ale sllggestiolls ollly alld cail easily valy witll tlle Illatelial of collstlllctioll.
RETRIEVAL TOOI, I)iMENSlONS
20 Wl~ip-AIlcll~r l ool l`ool 11~ l lo~-k l lo~-k W4~1~ M~ rirJI I`ol- ' ~ l~lcll l lo~-k Si~c 1.~ Wi~llll I~cl~ Vi~ -rl 11) ~tr~gll~ (`o~lllccliol~ Ol~ Al~glc 1.37 ~ 9 2.5~ 2.5~ x 1.27 1(~.16 (1.(~.~5 lO()ii 23~" 11 13 0.635 35 Il 1.42 1~ 13.~9 3.X1 3.~;1 x 2 ~ . 12.7() ().~53 12(31~ 2~/i" 11:1~ 0.953 35 25 1 1 1 1 . 17 1~ 1 9. (~5 5 .()~ 5 .()~1 Y 3.1; 1 1 5 . _ 1 1 ._7() 1 6() ii 4 '/z I ~ I ~ I .27( ) 35 I~IETRIC T.~BLE 7 ~ No Mdr~c i qui~.nlul~l Figllle ~ ICsllows tlle Retlieval Tool llool; flllly ellgaged witllin tlle retrieval slot, 30 12. Tlle distallce, 17~, I)etweell tlle l)ase of (lle se~ g slot, ~5, alld tlle bottonl opelling of tlle retlieval tool is set by stlellgtll of Illatelial considelations. Tllis lengtll also colltains tlle slleal pill apeltllle, fi7, wllicll is NOT sllowll ill tlle figllle. Tlle 35 degree angle for botll tlle letlieval slot all~l tlle Retlieval Tool llook is clesiglled to allow tlle hook to slide backwalds all~l away flolll tlle letlieval slot wllellevel tlle operatol "slacks 35 off" oll tlle weigl~t. Tllis Illealls tllat tlle llook ~all be ~lisellgaged if tlle Wllip-AIlcllo becomes stllck ill tlle bore.
It is illlpoltallt tllat tlle llook lelllaills ellgaged Illltil tlle opelatol tlllly wislles d;~L~ 6~"~cllt. For exalllple, if tllele is a set of fisllillg jal-s ill tlle BHA, an~l tlle w0 9s/23~73 2 ~ 7 ~ ~ 8 ~

operator wislles to llse tilem' tlley mllst be leset eacll tillle aftel llse. Fislling jals ale leset by slackillg off aD~ allow ~ llill stlillg ~4eigllt ''cock" tlle jals. Tlllls, disengage-ment of tlle hook Illllst be colltlolled so tllat fisllillg jals call be leset. Tllis can readily be ac~ "~ l,ed by tlle Retlieval Tool latcllillg ".c~ " 28, wllose ~tJ~ illl.31G5 location is sllowll at 27. Tlle latcllillg men~ consists of a spling loaded sheal pin arld 1,01~ r '' 2 opening fol tlle pill to l~op illto wllenevel tlle retrieval tool is flllly engaged in tlle letrieval slot. Tllele ale two elllbo~imellts fol tlle device.
The pleferred embodimellt for tlle Retlieval Tool latclling ~ is sllow in Figure i4A, ill wllicll the latcll pin, 20C, all~l sl~l illg, 207, ale retailled by a keeper, 208, o in an apeltllle, 20~, witllill tlle settillg slot face of tlle Wllip-Ancllor. Tllis positioll is preferred as best mo~le becallse of stlellgtll of Illaterial consideratiolls. Tlle latcll pill, 206, stlikes witllill a C,ollG~IJc ' 1-~ opellillg, 210, ill tlle Retlieval Tool face Tlle opening, 210, is largel thall tlle diallletel of tlle l)ill to ellsllle ellgagemellt. Tlle diameter of tlle pil- (and tlle -~llGal. .. ' g opellillg) is set l~y tlle reset weigllt leqlliremellt of tlle s fishing jals. Tllis lAtcllillg pill \~ill slleal if sllfriciellt weigllt is applied to tlle pin;
howevel, tlle pill is desiglled to lIeal tl~e weig~lt of leset fol tlle fislling jars; tlllls, disellgagelllellt is colltlolle(l. Tlle ol~elatol call lecil~locate tlle Wllip~Ancllol; he can reset his fisllillg jals alld lle call lotate it witllollt feal of illadveltent disengagement of tlle Retlieval Tool llook; bllt, wllell tlle tool is colllpletely stllck, tlle oi~elator ca ~o disengage by slackillg off llal~l oll tlle tool, sllearillg tlle latcll pill, alld fallirlg Ollt of tlle retrievalslot. Tlleopelatolwolll(llotatetlleRetlievalToolbyataqllalteltlllllall~ltri out of l~ole. Tlle altell)ate ell~l)o~lilllellt of tlle letlieval latcll ",~I.a"i~"" sllown ill Figllle 14B, is tlle levelse of tlle filst: llo~vevel, tllis is llot best Illode l)ecallse tlle opelling for tlle Ill~cl~ l, 211, WOIII~l weakell tlle Retrieval Tool bal.
~5 All altelnate embodimellt of tlle basic Retlieval Tool is sllowll in Figule 12B.
Tllis er~ cl~lilne~t, as previollsly explailled, will wolk best witll tlle lalgel Wllip-Anchor Types dlle to tlle ID of slllaller welll~oles. Tlle Retlieval Tool collsists of tlle sallle tool joint,180,RetlievalTooll)al,178,all(lllook, l77,aswitlltlleplefelle(lellll)odilllelltalld all tlle featllles ale silllilal. Tlle diffelellce is ill tlle llse of a tlll)lllal, 187, wllicll is 30 welded to tlle bal, 178, to coll(lllct fllli~l to tlle llook wasll pOIt, 175 latller tllell a hydralllic llose. Tlle tool joillt llas a fllli(l l~assage, 181, wllicll tellllillates ill a weld fitting, 18G, in wllicll tlle tllblllal, 187, is wel(le(l. (It WOIII~l be l)ossible to llse a tlllea~le~l fitting and t)ack wel~l the tlllea~ls if ~lesile(l.) Tlle tllblllal is tllell wel(led to tlle back of wo ss/23273 2 1 7 9 ~ 8 4 ~ Y~U~25~

tlle Retrieval Tool bal, 178, alollg tlle joil~t, 188, belweell tl~e two palts Tlle llook flllid passage, 176, flom tlle wasll polt is extell(led illto tlle tllblllal alld tlle tllblllal is sealed by a cap or plllg, 189 All otllel details ale tlle sall~e as witl~ tlle preferled e",bc ' - -t -hook I ,cn~iJ :, bar dimensiolls, etc, wllicll ale set by stlellgtll leq~ ementss Figllles lSA tlllo~lgll ~sD sllow tlle Retlie~al Tool llook a~ ,a.l,i,.g tl~e Wllip-Ancllor, rotation or aliglllllent witll tlle settillg slot alld (:I,E,.iE,C~ . As explailled later in this discllssion, tlle Retlieval Tool witll tlle l~lol)el B~A r~ illg tools wollld be tripped into tlle llole and the Retlieval Tool face aligllll~el~t wollld be checked when tlle tool is neal tl~e Whip-AIlcllor, tlle dlill stlillg rotated (as ill Figllle ]5B) to align tlle tool o with tlle setting slot, allcl fllltllel lowele(l Tlle settillg slot wollld plovide gllidal~ce to the Retrieval Tool hook face Tlle llook \~OIll(l I)ottol~ ollt oll tlle bottoltl of tlle settil~g slot bottom ol base, ~5 Tllis col~(litiol~ cal~ I)e ol)selved by a decrease ill tlavellillg block load or dlill stlillg weigl~t Tlle stlillg wolll~l I-e l)lllled llpwald al~d tlle Retlieval Tool hook sllould ellgage tlle retlieval slot El~gagelllellt sllollld l~e lloted by all illclease ill s drill stlillg weigllt However, ohell wllell l)llllillg a cllill stillg Ill~wald ovel sllolt ~listallces, tlle stling will jaln ill tlle well~)ole all(l flictiollal effects wollld give lligl~er weigllt illdicatiolls; tl~lls, it is possil)le tllat a false illclicatiol~ of l~ook el~gagel~el~t collld be obselved at tlle slllface Tllele is a secoll~lal~ etl~o~l to il~dicate plopel l~ook engagell~el~t wl~icll sellds a Illllcl l~lessllle plllse to tlle slllface The illventor ploposes sevelal ~iffelel~t el~bo~ el~ts fol sendillg a mlld pressure plllse to tlle slllface Tl~e preferle~l al~l~alatlls fol ~letermil~illg llook latcll ill tlle retlieval slot may be follnd il~ a "pistol~ sleeve valve" wllicll is desigl~ed to sllllt off l~llld flow wllell a 'hook load' is applied to tlle pistol~ sleeve valve Sil~ply stated a slll) containil~g tlle pistoll sleeve valve is attaclle~l to tlle tool joillt, 180, all~l is place~ l tl~e B}{A
25 imrn~ tely above tl~e Ret~ieval Tool sllcll t~lat wl~eneve~ weigllt is 'picked ~Ip' by tlle Ret~ieval Tool l~ook, tlle pistoll slee\~e valve closes alld sellds a p~essll~e l)I~lse to tlle surface Figl~re l'~C illllstrates a sleeve val\~e, 140, I llt does ~ot sl~ow tl~e Ret~ieval Tool subasseml)lywllicll wo~lld co~ltaill tlle olll)~ retlieval tool bar alld llook as sl~ow~ Figll~e 30 12A or Figl~e 12B Tlle pisto~l valve stalts \vitll a tool jOi~lt, 141, ill wl~icll al~ Ilpper Illlid passageway, 1~, llas beell l~lacllille~l to illtelsect a closs-passageway, 13~ Tlle cross-passageway te~llli~lates o~l tlle si~e of t~le tool joillt ill a tl~leade~l opellillg ill wl~icl~ a hydralllic street-ell, 143U, is placed A l~y~llalllic lille ~o~ Ilose), 14~, extends f~om tl~e w0 9sl23273 2 ~ 7 9 1 8 ~

upper stleel-eli to a lower stleet-ell 1 131 . l lle lo~er stl-eet-ell colldllcts flllid illto tlle piston cl~alllbel 15~ wllicll is IllAcllillecl ill tlle lo~vel sectioll IGO. Tlle lowér séctioll of tlle piston sleeve valve is screwe~l to tlle tool joillt l~y l)llttress tllleads 145. Tl~e fact tllat the pistoll sleeve valve call be opelle(l allows selvice of tlle illtelllal parts.
s The piston Yalve. 146 lesides witllill tlle lower section 160 and its associated piston cllamber 156. Tlle pistoll valve 146 llas a piston valve llead, 154 wllicll is lalgel then tlle piston vslve alld is cal~a~)le of sllppoltillg tlle llook loAd tlallsfelled by tlle Retrieval Tool llook wllellevel tlle Wllip-AIlcllol is latclled an(l plllled. A spling 148 is generally placed betweell tlle pistoll llead alld tlle bottonl of tlle piston challlber wllicl o llelps to sllppolt tlle pistoll val~e llp agaillst tlle tool joillt 141. Tlle pistoll valve 14~
has a set of piston lillgs 147 wllicll will seal tlle pistoll valve at alea 159 i~ nPr~i: tPIy below tlle pistoll cllanll~el 156. Tl~ele is a centlal fl-lid passageway 157 il~con nnllnir~tir~l witl~ a closs fllli(l passage 158 witl~ tl~e l~istol~ valve. Flllid fiow l~lay occu~ betweell tl~e lower stleet-eli al~(l tl~e l~istol~ I~assa~e\vays via tl~e llppe~ pisto ~5 cl~ambe~ and alolll~d tl~e l~istol~ sl~ g 1~8.
Normal flllid flow 150 wo~ll(l ellter tl~e top of tl~e tool at tl~e tool joillt passage 142 and follows tlle patll sl~owl~ by tlle l~eavy a~ows tl~lollgl~ tl~e l~ydralllic l~ose and tl~e associated stleet-ells il~to tlle pistol~ cl~alllbel tlllo~lgll tlle pistoll passageways alld ollt of tl~e bottolll of the tool. Tlle folce of tl~e ill~i(l acts against tlle pistoll head alld llolds 20 tlle head (alollg witll sollle belp flolll tlle sl~ g) 1ll) agail~st tlle tool joillt. Whell a l1ook load is tlallsferred to tlle tool tlle l~istoll extellsion 14'J ~ill tlallsfer tlle load to the piston 14~i alld ollto tlle pistoll llea(l 15:~ tlllls colllplessillg tlle pistoll spring and overcollling tlle folce exe~te(l I)y tll~ li(l. Tllis will dl-aw tlle pistoll acloss passage below tlle elltly poillt of flllid at tlle lowel stleet-ell 143L tlllls sllllttillg off flllid flow 25 to tlle lower poltioll of tlle pistoll all(l ollto tlle Retlieval Tool. Tlle closllle of tlle access polt will of colllse selld a plessllle l~lllse to tlle slllface wllicll is all ill(licatioll of Retrieval Tool llook engagelllellt oll tlle Wllil)-Allcllol Altllollgll tlle l~istoll slee~e val~e llas l)eell (lesclibe(l ill COlljllllCtiOII witll tlle retlieval tool tlle device call l~e llse(l ill ally fisllillg opelatioll in wllicll dlilling fl~lid is 30 cilclllated. For exalllple ill wilelille fisllillg ol~elatiolls it is vely difficlllt to k~low wllell tlle fislling tool has ellgage(l tlle ~lokell wilelille. Norlllally tlle driller lowels tlle wireline fisllillg tool illto tlle well~ole wllile lotatillg tlle (llill stlillg. Tlle stlillg is r a point wllele tlle blokell lille is expecte(l: all atlelllpt to pick llp tlle lille is nlade; and Wo9~2t273 2 1 7q l 8 4 P~ 7~

the dlill strillg is tlipped back to tl)e slllface. If llotlling is capt~lred, tlle operation is repeated, except tlle dlill stlillg is 1llll to a lowel poillt ill tlle wel~bole.
A major ploblen~ will occlll if tlle dlill stlillg elltallgles tlle bloken wire line for any distance above the fis~lillg tool. Tllis entallglelllellt will callse the drill string to stick s ill tlle wellbole and it can becollle iml~ossil~le to tl il~ llle dl ill stl illg ollt of tlle wellbole.
A wirelille device is extlemely ligllt, so tllat llollllal cllill stlillg weigllt indicatols will not rneasure ally illcrease ill weigllt wllellever a blokell wilelille is captllled by the fislling tool. The piston sleeve valve call be set to ill(licate captllle of the wirelille by sendillg a pressllre plllse up tlle dlill stlillg ill tlle cilclllatil1g mlld. Now it sllollld be noted tllat o tlle piston sleeve valve will actllAIly cllt ofl cilclllatioll; llowevel, a similar drill stlillg ~1l V~.,.cllt Illay be llsed as sllo~vll ill Figllle 70 wllele tlle l~istoll sllb, 100, is replaced by tlle Pistoll Sleeve valve. Tlle pilllle~ y-pass valve, 1'7, will allow for contillued Illlld circlllatioll. It is possible to desigll tlle ol~ellill~s wit~lin tlle pistoll sleeve valve so that circulatioll is only paltially Cllt off: tlllls, plo~lllcillg a plessllle plllse at tlle slllface wllile ~5 mqi ~ainin~ circlllatioll.
It is possible to illclease tlle c~ilclllatioll plessllle at tlle slllface alld attempt to folce tlle pistoll llead l~ack 1ll~ illto tlle tool joillt. Tlllls, collll~lete latcllillg of the Wllip-Allchol, welll-ole deviatioll assellll-ly, I~lokell wilelille, ol otller device can be tested for by incleasillg the mlld plessllle all~l seeillg if tlle flow incleases. If all increase in 20 pressllre does llot significalltly illclease tlle 1llll~1 flow, tllell llook engagemellt llas occllrred.
Tllele ale t~vo altelllate ~levices wllicll ale cal~able of plo~illcillg a plessllle pulse at the slllface alld tllese ale sllo~ll ill Figllles 13A ancl 13B. Figllre 13A sllows tlle preferred ellll~odilllellt fol a Retlieval Tool illcorl~olatillg a lly~llalllic plessllle llose, 183, 25 to blillg flllid to tlle wash polt, 175. Tilis te~lllliqlle will ~volk egllally well witll tlle alterllative lllet~lod of apl~lyillg fllli~l to tl~e wasll polt wllicll llses tlle wel~le~l tllblllal (llot shown in Figllle 17B). Tlle nlll~l plessllle plllse is l~lo~l~lced l)y stoppillg tlle wasl~ polt flllid at tlle wasll pOIt, 17i, tlllollgll tlle llse of a valve, 203, locate~l ill tlle llook, 177.
Tlle llook valve, '03, is opelate~l I)y a loa~le~l stelll actllatol, ~0~1, wllicll plotlll~les flom 30 tlle top of tlle llook. Wllell tlle llook l)lol~e~ ellgages, tlle letlieval slot at tlle top of tlle slot will sqlleeze oll tlle ac~llatol, 7(~1, tlllls c~losillg tlle llook valve all~l sell~lillg a mlld pressure plllse to tlle slllface. All altelllate elllbo~lilllellt is sllowll ill Figllle 13B wllicl uses all illtelllal flappel valve, 201, ac~llate~l I)y a colltlol lod, '0'.

9l84 WO95/Z3273 2 ~ 7 .

The second allernate e~ odimellt llses a fllll bo~ly tllblllar Retlieval Tool witll a hook. Tlle Retlieval Tool is Illa~le ill sevelal palts A stan~lard tool joint, 191, is welded to tubulal section, 19', wllicll telllli~lates il~ a tllleaded connectioll, 19~. A second tllbular sectioll, 187, is welded to a Retl ieval Tool l~ook, 177, has a lollnded bottonl elld, s 198, and matclles tlle first tllblllal, 197, at tlle tllleaded collllection, 19~. Tlle second tllbular sectioll, or Retrieval Tool tllblllal, 187, colltaills a flapl)el valve sleeve, 195, wllicll restrains and llolds tlle flappel valve, 201. Tl~e sleeve provides a sliglltly offset passage for the fluid, 196, and stops tlle fl"i~l flolll gettillg bellilld tlle flapper valve and closillg it inadveltently. Tlle sleeve passage, 19~, colltilllles tlllollgll a slllaller passage, 197, and o joins tile v~asll polt passage, 17G, wlli~ll tellllillates ill tlle wasll polt, 17~. All otller details, llook ~im~llcinl-c, lellgtlls, etc. ale silllilal to tlle plefelled embodiment. Whell the Retlieval Tool llook ellgages tlle letlieval slot, tlle llook is natlllally plllled towards the setting slot, wllicll plesses aoaillst tlle flapl~el valve actllatol, 20~, tllus, closillg tlle flappel valve, 201, plodllcillg a plessllle l~lllse at tlle slllfa~e.
s A fillal alterllate eml-o~lilllellt fol tlle settillg tool is illllstlated ill Figllre 37. 11l tllis er~llln(~ tlle base of tlle settillg tool is extellcled illto tlle body of tlle Wllip-Allcllol . Tllis elllalge~ ase ~olll(l llel lllit glealel clowllwal~l folce to be exel ted oll tlle Wllip-Ancllor Tllis altelllate wo~ l co~ lolllise tlle illteglity of tlle Wl1ip-AIlcllol if it is to be retlieved, for it wollld l~e weakelle~l.
~o Tlle llse of tlle Wllip-AIlcllol ~loes llot ~lift`el gleatly flolll the pliol art; llowevel, tl~is tool simplifies tlle plocedllle, actllally le~lllces a step, plovi~les metllo~ls wlleleby ollly one type of tool lleed be kept ill walellollse sto~k, plovi~les a wllipstock tllat call be set in tortllolls wellbore coll~litiolls, I~lovi~les a letlievable wlliystock, all~l plovides a tool wllicll pellllits bottolll hole wasllillg ill oj7ell llole collditiolls witll a mPrha~lir~l packel, ,s jllst to name a few of tlle ~llylia~l ~liffelellces ill tlle appalatlls alld Illetllod of llsillg tlle presellt illvelltioll. 11l keel~illg witll tllc sl~ilil of tlle pleviolls ~liscllssioll, Ille simplest opelatioll will be desclibed illitially all~l tlle ~liffelellces betweell tlle llse of tlle rn~rl~nir:ll allcllor packel all~l tlle lly~llalllic l~a~kel will l~e ~liscllsse~l. Tlle valiolls rn~n~iimlolltS alld llow tlley affe~t tlle ol~elatol will also be collsi~leled.
Refelellce will be ma~le to i igllles 1:> tlllollgll 79. Nolmal ~llill flool plocedllles for assemùlillg tlle Wllip-AIlcllol all~l cl~oosillg tlle propel coll~billatioll of dowllllole rllnnillg tools is aln1ost tlle sallle as Witll tlle l~riol alt alld it Illakes little diffelellce, as fal as tllis gellelal ~liscllssioll is collcellle~l, tll~ Tyl~e (size) of Wllil~-AIlcllol fol a givell W09~i~23273 2 1 79 i 8 4 .

size bole or wlletller tlle welll)ole is ol~ell ol case~l. Tllose skilled il) tlle alt of settillg wllipstocks will be able to sllpl)ly Illillol missil~g ~let.lils all~l see tlle Illillol differences tllat would occlll betweell cased and Illlcase~ oles. Tlle leal diffelellces between tlle instant invention and the pliol al-t will be disc~lsse~l.
s Assllme that tlle operatol Ilas ma~le tlle decisioll to deviate a wellbore, that the opelatol Ilas plopelly sulveyed tlle wellbole, tl~at tlle collal- Iocatol Illn ilas beell ll~ade, that the operator kl~ows tlle llole collditiolls all(l, tllat tile opelator llas Illade tlle ploper trip witll a locked llp bottolll llole assembly, tlllls, prepalillg tlle llole for settillg a whipstock. Assume flllther. tllat tlle l~ole is case~l alld tllat tlle operator has decided to o use a nl~cllp~ic:~l packel, WlliCIl is tlle sillll)lest Illetllod to ~lesclibe. Tllis discllssion will also assllme tllat tlle opelatol will take a~lvalltage of tlle illstallt invelltion ill tllat it allows tlle llse of MWD (Measlllelllellt Wllile i~lillillg) all~l tllat tlle opelatol Ilas cllose to llse an MWD tool to olielltate tlle face of tlle Wllip-AIlcllol.
Tlle Wllip-AIlcllor wo~ l llollllally he blollgllt to tlle ~llill flool ill all assemble~l s conditioll. Tllat is, tlle l~ ip-AIlcllol sell~i~e ,~1" .. wollld asselllble tlle tool.
Propel- clloice wollld be nlade fol tlle ~leflectol Ilead wllicll wollld be molll~ted per the previolls ~liscllsslon. Plopel cl~oice wolll~l be Illa~le fol tlle al~cl~ol packer size alld tllat wollld be mollllted to tlle base of tlle wllipstock llsillg tlle plopel closs-ovel sllb. If tlle optiollal spacer is le~llliled, tllell tllat \40~ 1 I)e l)lollllted. Il) otller wolds tlle tool wollld 20 look sonle wllat like Figllle 1, ol Fi ,llle ~ all~l,'ol Figllle 3. Tlle asseinble~l Wllip-AIlcllol would be set at tlle rig stagillg alea ~llile all plelilllillaly plocedllles (stall~lald) wollld be llndeltakell.
Tile lllllnillg assembly, tllat is tlle tools wllicll will be attaclled betweell tlle settillg tool and tlle dlill stlillg, Sllolll~l I)e assellll)le~l I)efole l)lacillg tlle Wllil~-AIlcllol oll tlle rig 25 floor. Norlllally a sillgle sectioll (ol joillt) of lleavy Weigllt Dlill Pipe, 1~7, is picked llp witll tlle ~IIill pipe elevatols all~l llse~l as a "llall~llillg slll)" becallse of tlle ease i attacllillg tlle tools l)elow it. Ally closs-ovel Slll), oliel)tatillg slll), by-pass valve, pistoll sub alld settillg tO01, tllat ale le~lllile~ 0~ l I)e attaclled to tlle sillgle joillt of lleavy weigllt ~llill l~ipe alld Illa~le 1ll) to t~lcil l)lol)el tol~llle witll tlle rig tollgs at tllis time.
30 Figllle ~0 Sll0WS all assellll)ly fol tlle assllllle~l coll~litiolls givell above. Tllese tools are the settillg tool, 100, a closs-o~er slll), 131, if llecessal)~, and MWD tool, 1271 or an optiollal orielltatioll slll) Illot sllo~ll]. a sill~le jOillt of lleavy weigllt dlill l~ipe, 17~, alld reqlliled collars, 171, fol attaclllllellt ollto tlle ~llill stlillg, 1'0. Tllese assemble~l tools W095/23273 2l7~ u~. ~
--would be stored in tlle elevatols O~lt of tlle l-otaly tsble wolking al-ea (above or to one side) becallse tl~e trAvellillg block witll dl;ll pil-e elevators is llot needed ill handling tlle Whip-Ancllor assembly.
The Whip-Anchor assembly wolllcl be l)ic~ke~ llp witll all "ail Iloist'' or tlle "cat 5 line" al~d landed in tlle rot~ry tal)le. It is tllell secllled witll al)plopliate slips and clamps.
The aforesaid assembled tools wolll(l be l~loLlgllt ilIto positioll, via traveling block and elevators, alld tlle settillg tool, 100, wolll~l be attaclled to tlle Wllip-AIlcllor, llsillg tlle sllear stlld, 3~. Tlle sllear pill keepel Iillg, 37, sllo~lld be placed ill its proper position on the Wllip-AIlchor to nlake certaill tllat tlle sllealed llead does not interfere witll tlle o operation of tlle Wllip-AIlcllol. Ahel olielltatioll of tlle Wllil)-Allcllol tool face to a "mark" on tlle tool joillt of tlle lleavy weigllt ~llill pipe, becAIlse tlle MWD tool is to be used fol olielltatioll, tlle "blill(~ Iallls'' oll tlle Blo~ O.lt Plevellter ~BOP) systellI wollld be opelled, if closed, all~l tlle total assellll)lecl tools wolll~l be lall~le~ l tlle lotaly table witll tlle tool joillt of tlle lleavy weigllt ~Ilill l-il~e at ''wolkillg lleigllt''. Becal~se all MWD
15 tool is to be llsed, it wollld be l)i~ke~l 1ll~ witl) tlle ~I~ill pipe elevatols alld tlavelillg block, and aliglle~ witll tlle ''Illalk'' oll tlle tool joillt of tlle lleavy weigllt dlill pipe.
It n1igllt be lloted llele, tllat sollIe ol~elatols Iike to 1llll all olielltAtillg sllb (llot shown) above tlle MWD ill case of MWD failllre ol sinlply becallse tlley wallt to clleck the orientatioll witll two diffelellt slllvey illst~llllIellts; llellce, tlle clloice of a wile lille 2D device. Also ill tlle l)Iior alt, tlle joillt of lleavy ~eigllt l~ e was recllliled to give tlle needed "flllclllm effect" fol tlle Staltel Mill, ~llicll was attaclle~l to tlle wllipstock, to nlake the 50.0~ celltill1etel pllls ol Illilllls T~" + I staltillg Cllt. 11l tlle installt illvelltioll, althougll llo longer lleeded ill tlle Wllip-AIlc~llol settillg rllll, tlle joillt of lleavy weigllt drill pipe wollld still be vely llelllflll ill l~ickillg 1ll) all~l layillg dowll tlle tools tllat ale llsed ~s directly above tlle Wllip-AIlcllol.
It is ill1poltallt to llote tllat witll tll~ silllplest elllbodilllellt it ~loes llot IllAttel whicll embo~lilllellt of settillg tool is ill llse. 11l tlle l)lefellecl elllbodillIellt~ tlle opellillg, 107, in tlle t~ llal, 10', is left ol)ell. 11l tlle altelllate ellll)odilllellt~ tlle tlllea~led opelling, II~, is left ol)ell.
Now sllppose tllat tlle opelatol wislled to llse tllis illvelltioll to its fllll potelltial and wash tlle llole bottoll1 tlllollgll tl~e IllecllallicAl packel. Befole tlle Wllip-AIlcllol would be lowered illto tlle llole, a lligll plessllle llydlalllic llose Ill-lst be collllected between tlle settillg tool Alld tlle lly~lla~llic fil~illg Oll tlle Wllip-AIlcllol Iool fAce. It is woss/23273 2 1 7~ ~ 8~ v- s.
assumed tllat tlle ll~lip-Arlcllor serl~ice repl-eselltatil~e llas illstalled tlle illtelllal plumbillg in the Wl~ip-Ancllol: namely tlle extla stleet-ells, 20, 21, all~l 21 pllls tlle 'cllt-a-way' llydlaulic lil~e. Tlle interllal l)l~ billg is i(lel-tical to tlle plllmbing requiled for a Hydraulic packel. T11e diffelellce il~ set~ g tool ~ ll>~ tC is not much for ill tlle s preferred cm~ nent, a sllolt llycllalllic llose, 113S, sllolll~l lle attaclled betwee~l tlle tubular openillg, 107 (via tlle leqlliled lly~llal~ fittil~g, 110) to tlle tool face street-ell, 20, befole tlle Wllip-AIlcllol is lowele~l illto tlle l~ole. 11l tlle case of tlle alter~late ~lnhr~rlim~-lt, a long llydralllic llose, 113L, is attaclle~l to tlllea~led lecess, 112, alld ollto the Whil~-AIlcllor tool face street-ell, 20. INote tllele is really llo diffelence betweell tllis 10 procedure alld tlle ploce~lllle leqllile~l witll a llydlalllic packer - tlle ollly diffelellce is in tlle type of flllid passillg tlllollgll tlle pllllllbil-g.l A sllggested bottolll ~lole tool asselllllly fol a lly~llalllic packer is sllown ill Figllre 21 where tlle opelatol cllooses to llse ollly a wire lille slllvey fol olielltatioll of llis Whip-Anchol face. Tllese tools ale, tlle settillg tool, lOû, a llistoll sllb, 130, a sllolt sllb 1~9, an orientatioll sub, 12G, ally re~lllile~l closs-ovel, 12~, followed by tlle sillgle joillt "llandling slll~'', 122. All altelllate asse~ ly is sllowll ill Figl~le 2~ wllele the opelator cllooses to llse an MWD tool fol Wllil~-AIlcllol olielltatioll lif all olielltatioll sllb were requi~ed it wollld be placed above tlle MWD tooll. Tlle older of tlle tools is somewhat critical for tlle pinned by-pass sllb, 128, Illllst be place~l below tlle MWD, 1?7, and above 20 the sholt sllb, 129. Tlle assembly teclllliqlles fol tllese tools is similal to that desclibed above and it is kllowll tllat tlle sllolt slll), 129, is illitially Illa~le llp "cllaill tigllt" Illltil ahe llydralllic flllid is placed ill tlle l~istoll sllb.
All illllstlatioll of a pistoil sllll, 130, wlli~ll wollld fit a Type 11 Wllip-Allcllor, is shown ill Figule ~9. Tllis collcept is ill lelatively commoll llse, bllt it will be desclibed 25 here becallse tllis palticlllal tool selves t~vo fllllctiolls alld will gleatly ellllallce tlle Wllip-Ancllor settillg process; llellce, tlle llse of tllis tool folllls a palt of tlle plefelred Illetllo~
of settillg tlle tool. Tllese two fllllctiolls ale:
1) tlle slll~ plovi~les isolatioll betweell tlle ~llill 1llll~l flllicl a~l~l tlle leqlliled clean lly~llalllic fllli~l llee(lecl to set a lly~llalllic packel, alld 2) tlle slll) plovi(les a sillll)le \\~y fol 1llll(l to (llaill flolll tlle (llill stlillg as it is witlldlawll flolll tlle l~ole llole aftel settillg tlle Wllip-AIlcllor, tlllls avoi~lillg t~le splay of ll~ oll tlle lig nOol wllell eacll stall(l is bloken.
The Wllip-AIlcllol will Illost likely be llse~l ill ol~ ore lloles all(l, llsllally, all oil based wossl23n3 2 ~ 79 ~ 8 ~ r..,~
-- 4~; --drilling n~lld, wl~icll is consideled toxic l>y tlle leglllatillg alltllolities, is used. Tlllls, wllell pulling ollt of the llole, it is i~llpelative fl~at tlle alllollllt of flllid splay coming floll] a "breaking" tool joint be redllce~l. Tllis l~istoll Slll) will aCco~lrlicl1 that pllrpose Alld is mllch better tllan most similal tools clll l elltly slll~l)lied by Illajol sllppliels of whipstocks.
Figllles 29 and 30A-B, are illllstlatiolls of all ill1ploved pistoll sllb to be used witll a Type ~I Whip-Anchor. Tlle ~ill1ellsiolls of a silllilal sllb fol a Type I or Type ~11 Wllip-Anchor will change, bllt ollly ill OD/ID of tlle slll). T!le illtelllals will ollly valy sliglltly to fit tlle diffelent sllb OD/ID. Tll~ls, allyl~o~ly skille~l iil tlle alt will be sble to reprodllce this tool for differellt sizes of Wllil~-AIlcllol . Tlle illlploved piston sllb consists of a lower sub, 13û, abollt ]8.3 nl ~6'] lollg wllose dill1ellsioll is actllally set by tlle volun1e of hydlalllic flliid needed to ol~elate tlle cllosell lly~llalllic packel; wllelein, tlle ID at tlle bottoln of tlle lowel sllb is elllalge~l to forlll all elllalged pistoll lall~lillg, 136. A pistoll, 131, llavillg all o-lillg all~l gloove, 13~, is place~l ~vitllill tlle S~ll). Tllis pistoll llollllally seAls tiglltly against tlle illtelllal \~all of tlle lo~el slll~. Tlle ~)istoll llas a riser, 134, wllicll passes tlllollgll tlle pistoll alld is tellllillate~l ill a lellloval~le cap, 135. Wllell tlle piston iswitllill tlle llorlllal bole of tlle sllb, it seals tiglltly agaillst tlle wall; llowevel, wllell tlle piston is in tlle landing, 136, tlle o-lillg seal is blokell. Tlle piston sel~es as an illterface betweell dlillillg mlld alld cleall lly~llalllic fllli~l. Tllere ale two 0.95 clll ~ cilclllation cllannels, 133, tllat ellllallce tlle 1llll~l flow past tlle l~istoll aftel it leaclles tlle lall~lillg.
It sllould be lloted tllat a silllilal tool is collllllelcially available, bllt tlle comn1ercial tool llses a Falticlllally collll~lex l~istoll cage all~l v,llve allallgelllellt at tlle bottom of the lowel sllb ill ol~lel to bleak tlle seal betweell tlle two flllids. T~lis particlllar caging allallgen1ellt is Illllelial~le l~ecallse it is so complex. Tile inventor removed tlle cage an~l "bole~ ack" tlle aleawllele tlle cage lla~l been positiolled. "Bore-25 back" is a tell11 wllicll Illealls illcleasillg tlle ID of a l~art to a certaill deptll. In tllis case tlle illvelltol elllalge~l tl~e ID of tlle lo\~el s~ so tllat it was leasollal~ly lalgel tllall tlle pistoll alld leasollal~ly lollgel tllall tllc l~isloll. 111cse ~lill1ellsiolls ale llot clitical -- tlley Illllst be cllosell so tllat tlle !~istoll~ wllell it lall(ls ill tl~is legioll, llo lollgel seals agaillst tlle illllel ~all of tlle lowel s(ll~. Ally l~clsoll skille~l ill tlle alt of do~llllole tools will 30 lecogllize tlle exact dilllellsiollal le~l~lilelllellts as tlley ale set l)y tlle lelative size of tlle tools tllemselves. Tlle bole-l)ack will lallge fl-olll sevelal r~ t~-c Iflactions of all incll] to a collple of Illeters Isevelal feetl (lel)ell(lillg oll tool all~l pistoll lellgtll; wlleleas, tlle bole-l)ack diallletel ~ill l.lllge flolll sevelnl Illillillletels If lactiolls of all illclll to a WO 9Slt3t73 2 l 7 9 1 8 4 . ~ 4 numbel of ren~im~t~rs jsevelal illcllesl lalgel tllall tlle diall~etel of t~le piston.
Tlle colllplete pistoll sllb asselllbly, collsistillg of the llpl~er (sllort) and lower sllbs plus tlle piston liser genelally is attacl~e~l to tlle settil~g tool alld l~ydlalllic cc~ ic"-made. Tl~e sllolt sllb, whicll is ol~ly cllaill tigllt, is opel~e~l and the pistol~ risel, 13-1, s pulled up to the top of tlle piston slll) Tlle liser cap, 135, is opened and the proper hydraulic flllid requiled by tl~e l~ydlalllic packel is pollled tl~lollgl~ tl~e riser opening, 137, until tl~e entire volunle below tl~e pistol~, 131, is filled witll l~ydra~llic flllid Tl~is volllme incllldes the packer, tl~e l~ydla~llic l~ose, al~l fittillgs ill tlle Wllip-Ancl~ol, settil~g tool, etc.
Tl~e cap can be replaced alo~g witl~ tl~e llpl~el stllb which is tllell blollght to the ploper o torque, ol tlle riser cap call be left off. If tlle liser cap is left off, tl~e lisei shollld be filled witl~ I~eavy Illblicant. Tl~e llea~y Illblicallt will act as a lemovable plllg or seal between tl~e l~yd~alllic flllid an~ tlle ~llillillg fll~ silllilar to tlle fllnctioll performed by the riser cap Tlle hydlalllic packel is set, ill tlle stal~clal~l Illal~l~el, by pless~ g tile dlilling s flllid ~Iydlalllic settil~g plessllle is tlallsfelle~l tlllollgll tlle llistol~ tl~e pistoll sllb.
Once tl~e packel is set, tlle lly~lalllic lille is blokell betweell tlle settillg tool and tlle packer leavillg tlle elltlailled llydlalllic fllli~l flee to leave tlle pistoll sllb Tlle pistoll freely moves downwald. Wllell tlle pistoll leacl~es tl~e el~lalged landil-g, tl~e seal between the pistol~ al~d tlle wall of tlle lowel sll~) is llo lollgel flll~ctiol~al al~d tl~e dl illil~g flllid will 20 proceed past tl~e O~ g al~d oll~ of Ille l)ottol~l of tlle pistoll s~lb, tlllollgll tlle brokell llydralllic lille alld illto tlle wellbole If tlle l)istoll does llot llave cllallllels, tllell tlle piston will seat oll tlle bottolll of tlle slll) (actllally oll set of tlllea~ls belollging to tlle lower tool) and inllil)it flllid flow. If tlle lisel cal~ is left ollt of tlle assembly and tlle liser filled witl~ I~eavy IIlI)lical~t, tl~e dlillil~g flllid will l~llsll tl~e Illblical~t ollt of tl~e liser and ~5 tlle riser cal~ plovide a backllp (ol evell plil~laly) I~assage fol tl~e dlillil~g flllid.
Ol~ce tlle Wllil~-AIl~llol is ill 1)l;l~, tlle ll~llalllic l)ackcl is set l)y illcleasillg tlle drillillg 11111~ Iessllle: tllis 11111~l COI~ leSSlllC is tlallsfelle~l to tlle lly~llalllic fillid tlllollgll tlle l-istoll slll) ~1ll~1 tlle slil)s \~ill Illo~e As tlle lly~llalllic slil)s Illove, tlle flllid ill tlle pistoll slll) will ~leclease all~l tllc I)isloll, 13~ ill Illove to~val~s tlle lalldillg (A sligllt 30 decl'eaSe il) I)llld pl'eSSlll'e is Always ol)sel~e~l v~llell tllis l~apl)ells al)d tllis ~eclease tells tl~e sulface obselvers tl~at tl~e lly~llalllic l~acker is begil~l~illg to set ) Aher tlle l-ydlalllic packer isset, tlle dlill stlillg is lelease~l flolll tlle Wllip-AIlcllol by pllllillg llpwald oll tlle dlill stlillg, wllicll slleals Ille slleal I)ill .1ll~l I)l~l;s tlle lly~llalllic collllectioll to tlle Wllil)--W095/~3~73 2 ~ 7 9 ~ 8 ~ r~ l" n~4 Anchor face. As tl~e drili stlillg is plllle~ walcl, Illlld colll~ plessllle will force tlle remaining llydlalllic flllid flom tl~e pistoll s~ll) allcl tlle pistoll ~ill lalld. Tllis tllell allows drilling mlld to readily flow alollllcl tlle l~istoll alld ollt of tlle open/brokell hydralllic hose, and tlle drill pipe will dlaill as it is pllllec~ ollt of tlle llole.
s The actllal setting plocedllle fol tlle new style Wllip-AIlcl~or will now be discllssed. Tl~e techniqlles for 1111111illg tlle Wl~ -AIlcllol il~to tlle wellbole, be it llsed with a nnrrl~ nir:ll 01 llydlalllic packel, ale tlle sallle as llsecl ill tlle cllrrent art Tlle Whip-Ancllol service leplese~ltative ~leecl llot ~ol ly as sllcll al~ollt illa(lvertent pill slleal in pllshing, becallse tlle settillg tool lests fillllly ill tlle botto~n of tlle setting slot.
~o Likewise, tlle Wl~ip-A~lcllo~ selvice lel~leselltative lleed llot worly abollt torsional pill shear becallse tlle setti~lg tool is colltaille~l I)y tlle si(le walls of tlle setting slot. Tllese two featll~es will gleatly ellllallce tlle Illobal~ilit~ of a sllccessf~ll set. Tlle Wllip-AIlcllol service teprese~ltative mllst still be collcellle~l witll illa(lvertellt pill slleal wllile u~alillg tlle Wllip-A~lcllol ill o~(le~ to folce tlle tool tll~ollgll a particllla~ly to~tl~olls path, fol tlle pill will slleal as (lesiglle(l, witll sllfficiellt llpwal(l l~illl. Assllming tllat tlle Whip-Allcllor selvice lepleselltati\~e llas sllc(essf~ y l~ositiolle(l tlle Wllil~-Ancllol, tllat he has sllrveyed tlle tool face oliellta~ioll, all(l tllat lle is il~ gellelal satisfied Witll tlle operation, all tllat le~llai~ls is tlle settillg of tlle l~ackel-allcllol.
Tlle ~lleclla~lical packel-allcllol is set by slacki~lg off o~l tlle dlill stli~lg alld ,o allowing tlle p~opel weigllt to lest oll tlle setti:lg tool. Tllis weigllt will l~e transferled to tlle Wllip-AIlcllol wllere sevelal tllillgs will llal~l~ell;
I) tlle torsiollal t~ist abollt tlle offset llillge will slleal tlle spli~lg retai~lillg pill, all(l 2) tlle t~allsfe~e(l weigllt will callse tlle ~llecl~a~lic.ll packer collet to release, tlle weigllt will colllpless tlle packillg elelllellts alld tlle~ set tlle slil~s.
Tllis ope~atioll is sllowll ill Figllle ~3, ~llicll illllstlates tlle l~lefelle(l ellll~o(lilllellt settillg tool l~si~lg tlle ope~l tlll~llla~ 7, illlllle(liately l~liol to settillg tlle ~ ir~l allcllol-packel. Tllele ale llo llose collllectiolls l~elweell 11l~ ol~ell tlll~lllal, 107, all(l tlle llydlalllic 30 passageway, 19, oll tlle face of tlle wllil~stoch. INote, if tlle ol)elato~ we~e usi~lg tllis systenl i~l opell llole alld (lesile(l to l~c~tto,ll wasll, tllele wolll~l be a lille betwee~l tlle tllbula~ a~ld tlle wllipstock passa~eway, as ple~!iollsly explailled.l If tlle packel is being sed il~ all ol~ell (Ill~case~l) llol~, tlle ol~clatioll is silllilal, except tllat Illllcl allcllols ale wo 9s/23273 r~ 4 2i79~8~
used in t11e r~ hP~ packe~ stead of casillg slips.
T'i1e llydlalllic packel is set by well kllo\vll stalldald l)locellllles. Tllis opelatioll is shown ill Figllre 24, whicil illllstlates tlle plefelled ell~bodilllent setting tool using tlle tubular, 102, witll a sllort llose, 113S, collilected betweell tlle tllblllar tllreaded openillg, 5 107, and a stleet-ell, 20, fitte(i ill tlle lly~llalllic l)assageway, lC,7, on the face of the whipstock. Simply stated, tlle Ill~ld piessllle is illclease~i. If all MWD tool is in tlle bottom llole assembly, the associated pilllle~l by~l)ass valve will release, tlllls, slluttillg off mud circlllation and allowing Illlld plessllle to illclease. Tlle inclease in mud plessllle is applied to tlle piston sllb, tlallsfelled to tlle lly~llalllic fillid alld ollto to tlle hydlalllic o packer. Tlle Wllip-Ancllol selvice repleselltative looks fol tlle "plessllre bobble", as previollsly explaiile~l, wllicll ill(iicates tllat tlle lly~llalllic packel Ilas begllll to set. The n~ud pressllre is tllell illCleAse~l to wllatevel l)lessllre is llecessaly to set tlle hydralllic ancllol -packel .
Ollce the allcllol-packel is set, I~e it Illecllallical or llydlalllic, tlle llext step is to 15 pllll ollt of llole. In older to do tllis tlle Wllil)-Allcllol Illllst be leleased frolll tlle settillg tool and, llence, the dlill string. A Illllllbel of well kllowll steps ale takell wllicll do not differ frolll tlle clll lellt alt. ~ sselltially, tllese stel)s ale ~lesiglled to Illake celtaill that tlle anchor-packe~ Ilas plopelly glil)l)e(l tlle casillg ol tllat tlle Il~ slil)s llave fillllly embedded tlle bole llole (folmatioll). ~lle Wllil)-Allcllol selvice lepleselltative genelally 20 pllllS al~d slacks off sevelal tillles oll tlle ~llill stlillg 111 7il~i~illill~ tlle stlaill each tinle for about a mill~lte~ If tlle mecllallical packel Illoves, tlle settillg plocedllre sllollld be repeated. If tlle llydlalllic packel Illoves, tllell tlle Wllil)-Allcllol selvice lepreselltative should follow tlle norlllal lesettillg ploce(l~lle allea~ly placticed witll tllis type of packer.
Aher assllrillg llilllself tllat tlle allcllol-packel Ilas l)lopelly set, tlle Wllil)-Allcllol selvice 25 lepresentative plllls back oll tlle c~lill stlillg slo~vly, illcleasillg tlle folce llntil tlle sllear pill fiactllles. Tlle sitllatioll fol bolll tyl)es of l~ackel is sllowll ill Figllles 25 alld 26.
- Note tllat ill Figllle ~6, tlle sllolt llycllalllic llose, 113S, I)reaks cleal of tlle wllipstock face taking tlle flactllled street-ell, 20, witll it. Flactlllillg of tlle stleet-ell, 20, at tlle face of tlle whipstock at tlle poillt of tlle tllleacls is asslllecl by careflll scolillg of tlle stleet-ell, 30 20, befole or ahel it is place~l ill tlle wllil)stock ~ lillg assellIbly.
Altllollgll tlle l)lefelle~l ellll~o~lilllellt o~ tlle settillg tool is sllo~ll ill tllese illllstlatiolls~ tlle altelllative ellll~o~lilllellt \~llicll llses a lollg lly~llalllic llose, 113L, ill place of tlle slloltel Ilose, 113S, opelates ill tlle sallle Illallllel. Ul)oll l~leakillg away frolll tlle wo g~/23273 2 1 7 ~ ~ 8 4 F ~ i'r~4 whipstock, tlle longel Ilose will take tlle flact~lle~l stleet-ell, ~0, witll it. Tlle entile stlillg is removed flom the l1ole all~l t~le secollcl pass tools ale plel~ale~l fol tlle actllal willdow mill cut.
SIIEAR l'UI,I. VAI.UES
Wllip-AIlcllor Sizc l~l-rc si~ Sl~ r S~ Si~c Apl>roxill~ate Sllea~ Force~
Illous~ s of Kilo~rams 8.89 Ol) 9.53-13.97 1.27 x 7.. ~ 1.55, 6.82, 9.(~9 ~o 11 13.97 OD 14.61-20.32 1.~9 x 3.1# l~llg~ll 9.()~), 11.36, 13.64 111 2û.32 Ol~ 2û.96-31.7~ 1.91 x 3.#1 lell~lll 13.6-1, 15.91, 1i3.18, 20.45 vurics willl Wllil -allc~lor sizr I\~ETRIC ~ 31 E t~
The apploximate vallles of slleal folce is gi~ell ill tlle tal~le above. It sllould be remembeled tllat tllese vallles ale ollly al~ploxilllate and tlle vallles seell at tlle slllface will vary, depending ol~ tlle welll~oJ e coll~litiolls, l1ole lellgtll, etc. Tlle actllal sllear vallle of the sl~ear stlld will be detellllilled l)y tlle slleal gloove tllat is cllt ill tlle stlld. Tlle 20 slleal vallle is careflllly cllosell llsillg teclllli(llles well kllowll ill tlle illdllstly alld is set by the size and weigllt of tlle Wllip-AIlcllol (tlle v~ stock alld its ancllol-packer), wllether the Wllil~-AIlcl~ol was to latel l~e letlieve(~, al~d tlle llole coll(litiol1s~ Fol example, a Type I tool witll a letlievable lly(llalllic set allcllol packel, llsed fol dlillillg 11.43 cln [4%"] mllltiple dlaill l1oles, wolll(l llolll~ally llse a ~"S~S0 kg 110,000 polln(lsl sllear stlld if hole collditiolls wele good becallse tl~e tool wolll(l l~e slated fol Ietlieval. On tlle otl~el hand, a Type I tool llsed witl~ a pellllallellt lly(l~alllic or l--.-rl~ icr~l packel wollld use a 9.09 kg [70,000 poilllds] slleal stllcl becallse tlle tool wollld llot be letlieve(l.
The secolld pass, tlle actllal Cllttillg of tll~ WillClOW ill tlle casillg or the start of the deviated l1ole ill all Illlcase(l llole, is la(lically (liffelellt to tlle pliol alt. Tllis invelltio 30 diffels froll1 tlle pliOI alt ill tllat tllele is llo staltillg Illill opelatioll. 11l tlle pliol alt alld referrillg to Figllle ~7A alld Figllle 77B, a slleal pill block, 40, was always welded ollto the surface of tlle wllipstock tool face, I l, witllill abollt tlllee-telltlls of a meter ~ of the top, to wl1icl1 tlle slleal pill was bolte(l. Tlle slleal pill l1elcl tlle staltel n1ill ta~el, 41, to tlle block. nle startel mill ill tlllll was attaclled to tlle (llill stlillg witll l1ecessaly 3s optional tools reqlliled fol settillg tlle wllil~stoclc. Silllply pllt, a silllilal ploced~lle as described above was llsed to set tlle wllil~stock. Tlle ollly dlaw~ack beillg tllat tlle llsllal priol art systellls wele (lesiglle(l to l~t Ilsecl witll llycllalllic pacl~els becallse sllfficient weigllt, to set a ~ rl~llical allcllol l~ackel, callllot l~e ill1pal tecl to tlle face of a wllipstock W0 9s/23273 2 1 7 ~ 1 8 4 ~ ^7~c4 throllgh a sl~ear pin Fol exan~ple, tlle ~ lll set ~lov~ eigllts fol goocl set ol) a nl-~r~ ir~1 complessioll packel is as follows Type I size lange 18,000 kg 140,000 pollllds]
5 Type 11 size rallge 27,000 kg 160,000 pollllds]
Type 111 size ra~lge 36,000 kg 180,000 polllldsl Thus, it call be seen tllat t~le pliol art, wllicll lltilizes a s~lear pin without a setting slot, cannot "set" ,u...~ ~iC~Il mecllallical packels l ecallse tlle slleal pill re~ "l~ ale roughly olle-half of tlle set dowll le~ eillellts Tllere is olle form of m~rh~r;^:ll packer o that llses a single slil~ segmellt v~llicl~ leslllts ill a lower set dowll reqllilement; llowever, tlle procedule for settillg tllis l~alticlllal I~ackel leqlliles tllat weigllt be applied to the packel until tlle slleal pill slleals Tllis Illealls tl~at tlle "set" of the packel callllot be tested by plllling llpwald In tlle pliol alt tlle illitial staltel Illill acco~ lislled two oL)jectives 1) tlle Illillillg off o~ tlle slleal pill l)lock, 40, tlllls plepalillg tlle wllipstock tool face, all~l 2) staltillg all illitial ~ -slol~e Cllt, ~ lto tlle casillg (ol folmatio ill a~l llncased l~ole) Tl~e staltel Illill, 4~, wollld pllsll agaillst tlle tol~ of tlle wllipstock and be deflected illto 20 the side of tlle casillg An ad~litiollal flllcrlllll effect was obtailled flolll tlle starting mill tapel, 41, pushillg agail~st tl~e slleal block, 40 (Please see pliol alt illsets ill Figllres 23 tllrollgh 27 ) Aftel tlle sta~tel Illill lla~ tlavele~l al~ollt 30 celltillleters l12"] illto tlle hole, thlls c~ltting a stalte~ willdow of sollle 30 celltillletels ~17"1 ill tile casing (or folmatioll in an llncased llole), tlle staltel mill ~vollld l)egill to Illill tlle sllear block Tlle maximllm ~5 distance tllat tlle startel mill collld travel was al~ollt 50 celltillleters l'20"l before tlle staltil~g mill taper wollld llallg llp ol~ tlle casillg all(l keep tlle staltillg Illill flom movillg along the leqllired (leviatioll patll, 45 Qllite oftell tlle staltel mill wollld cllt into tlle wllipstock tool face; tlllls, ~lalllagillg tlle llecessaly flllcllllll pvillt, 4~, lleede(i by tlle watermeloll Illill Tllis device lel~laces ~ile stalt Illillillg opelatioll witl~ a silllple will~low 10 mill, 48; tlle window Illill beillg ~leflec~e~l by tlle cleflectol Ilea~l, 7 Tlle secolld pass dowllllole tool asselllbly collsists of, a plopelly sized window mill, 48, and a plopelly sized watelllleloll Illill, 47, (a secolld watelllleloll mill, 46, call be added by tlle operatol if a lalgel ~vill(low opellillg was llee(led ill tlle casillg), as sllowll w09s/23273 21 7q l 8~ r~"~ 7~

in Figules '27 alld 28. Tllese will~low Illill tools ale lls~lally attaclled to a single joint of heavy weigllt dlill pipe to llelp ellsllle tlle l)lol~el flllc~r~ effect; followed by tlle colrect number of dlill collals, whicll plovide tlle l-ecessaly millillg weigllt. n~e pllldent operator will add a set of dlillillg jars wl~icll is followed by sllfficient dlill collars to 5 provide weight for tlle jars. Tlle additiollal tools, drill collals, subs and jars are not shown bllt ale well kllown tools ill tlle prac~tice.
Figllre 27 sllows tlle stalt of tlle will(~oW ll~ lg opelatioll. Tlle window l~lill, 48, is def ected against tlle casillg (ol folmatioll), by tlle deflectol Ilead, 7. The deflector head will carly the fllll weight of tlle Illiliillg opelatioll lllltil tlle mill is able to Cllt into o the casing (ol folmation) at wllicll tillle Illole alld mole mill weigllt will sllift to tlle wellbore side. It is kllown tllat tlle staltillg Illill ~ill Illake all illitial cllt illto tlle casing, ~, and tllell begill to pllll itself illto tlle casillg liclillg llp ollto tlle illitial Cllt. Apploxi-mately tlle first tllild of a metel lolle footl of Illillillg is tlle clitical lellgtll, altllollgll tllis distance will illcrease witl~ tlle size of tl~e llole. Please see tlle deflectol Ilead pal-ametel ~s table, table ~. Tlle actllal Illillillg l)alallletels ale tlle sallle as tlle pl'iOI' art llses aftel tlle initial mill, tlllls, tllese teclllli~llles all~l palallletels ale well kllowll by tllose skilled ill tlle art and need not be discllssed ill gleat (letail. Tlle pliOI alt is S~lO~VIl ill Figllles 27A and 27B. As tlle willdow is cllt in tlle casillg, tlle willdow mill, 48, llloves dowllward alld tlle watermeloll mill, 47, begills to elllalge tlle casillg (ol follllafioll) cllt. Tlle watelllleloll 20 mill fulcl llllls off tlle wllipstock tool f~lc~e, (sllo~ll al)l-roxilllately as poillt 4~) to llelp keep the window mill oll ils ~leviatio~ atll. A~l~litiollal flllcilllll effects ale plovided by tlle single jOillt of dlill pil~e (alld secoll~ atelmeloll Illill, 4G, if llsed) to gllicle tlle lowel tools. Tlle Whip-Allcllol selvice lel71eselltative wollld llollllally llse tllis set of tools to mill the willdow and sllfficiellt follllatioll to ol)taill a total ~leptll of betweell 2.1 llleters ~5 [7'] alld 3.05 meters 11'1 (a llollllal distallce l~leselltly llse(l ill tlle alt). Tllese tools wollld tllell be removed a~ a llollllal cllillillg ol~elatioll wolllcl comlllellce oll tlle llext trip.
Tlle Wl~ -Al~ ol is a letlie~ tool ~llicll is a lligllly clesi~e~l cllalacteristic fol use ill Illllltiple dlaill lloles ol ill Ill~lllil)l~ slil)) llole explolatioll. Tlle letlieval of tlle tool 30 is made collvellient tlllo~lgll a caleflllly ~lesiglle~l fisllillg systelll based oll field experiellce.
Tlle majol problenl in letlievillg tools (or ally ol)ject) frolll a wellbore is beillg al)le to get a glip oll tlle o~ject so tllat it c~all l)e witll~llawll. Tlle Wllip-AIlcllol is letlieva~le becallse it llas a sl-ecially ~lesiQllc~l slot all~l letlieval tc~ol (fisllillg tool) systelll wllicll WO 95/23273 2 1 ~ P~ l/.J~ 77~
allows for easier gripping of tlle tool. Tl~e operatol sl~o~lld p~opelly plepale the hole for retrieval of the tool whicll sllollld be colldllcte~l I)y a qllalified Wllip-Anchor service ~I,..se..lalive. Ploper wellbole prepalatioll wolll(l illclll~le a tlip with a locked up bottom hole assembly and a good effolt to sweel~ all dlill cllttings whicll woll~d llave s come fron~ tlle newly deviate~l wellbole flolll tl~e Illaill wellbole.
The clloice of downhole lllllllillg tools fol a letlieval operatioll is based on myliad conditiolls and qualified Wllip-AIlcllol Selvice Repleselltatives will have no ploblell~ i selecting the correct combinatioll of too!s to be llsed witll tlle Whip-Ancllor retrieval tool. A suggested centralized Bottolll Hole Asselllllly (BHA) arlangement is shown in o Figure 31 staltillg witl~ tlle letlieval tool 3. Tlle letlieval tool sllollld be followed by all unpinned by-pass valve 141 I)ecallse tlle letlie~al tool wasll passage 176 cannot pass sufficient flllid flow to plol~ell~ ellsllle ~llaillage of drillillg flllicl flolll tlle drill string wllell pllllillg ollt of llole. Prol~el dlaillage of tlle ~llill stlillg is esselltial to assllle tllat mud is not released oll the dlill ~lool. (As state~l ealliel this ~levice will filld its greatest s use ill old bores ol ill Illllltiple ~llaill boles wllicll llse all oil based 1llll~l: collsidered toxic by tlle leglllatoly alltllolities.) A f~lll Gallge stal~ilizel 118 wolll~l tllell follow. At tllis point tlle Wllip-AIlcllor selvice lel~leselltati~e call illstall all MWD 121 ol an orientatioll sllb 12G witll a sillgle ~llill collal 11~. Eitller asselllbly can be used for orielltatioll of tlle retlieval llook ill tlle llole altllollgll all MWD tool wollld be plefelred.
20 Tlle orielltatioll tool(s) are tllell ~olloYe~l I)y a secoll~l f~lll gallge stabilizel 1]8. A set of jars 14n is lecollllllellded pllls tlle llecessaly ~llill collals 121 for tlle jars. Fol a Type I Wllip-AIlcllor tlle Wllip-AIlcllol selvice repleselltative sllolll~l llse 9 000 kg [20 000 po~llldsl weigl~t of dlill collals; f~l tl~e Tyl~e 11 tool 18 000 kg 140 000 polll~ds]
is recornl~ fl al~d for tl~e Tyl-e 111 tool 77 000 kg 160 000 pOlll~as]. Tl~is con~plete 25 centralized BHA wollld be attacl~e~ to tl~e ~llill stlil~g 120 al~ tO tl~e wellbo~e using stal~dard tecl~l~iqlles.
Tl~e letlieval tool alld Bl IA wolll~l be 1llll illtO tlle wellbole to jllst above tlle top oftlle Wl~ip-AI~cl~o~ (see Figllle 15A). At tl~is til~le tl~e Retlieval Tool Hook Facewollld be orientated to face tl~e setti~g alld letlieval slots (See Figllle 15B). After orie~tatiol~
30 the mlld Plll~ s wollld be llse~l via tlle wasll l~olt 175 to tlllsll al~y del)lis Ollt of tl~e setting slot 13 alld tlle letlieval slot 12 Ol~ tl~e Wllip-AIlcllol as tlle Retlieval tool proceeds downllole. Tlle l etl ieval ll~ok l~assageway is ~lesiglle~l to scl llb tlle wall of tlle wellbolealldtllesettillg!letlievalslotfolaIllolellositivelatcll alldtllecelltlalizedBlIA

wog~n3273 21 79 t 8~ PcTrusss/o22s4 described above will ensllle tllat tllis actio~ deed llappells. If tlle letlieval tool will not "scrub" dlle to extren~e wellbole collfig~llatiolls, a~ lstlllellts call be Illade to tlle tool ill order that it will ploperly ''scllll~.'' Tllese adjllsts collld illcl~lde addillg a bellt sub assembly (not shown) betweell tlle letlieval tool, 3, alld tlle l)y-pass valve, 117. If worst s comes to wolst. tlle actllal retlieval tool co~ll(l be l~ellt.
Attempts wollld tllell ~e ll~a~le, l~y lecil~locatillg tlle dlill stling, to latcll tlle retlieval tool llook, 117, into tlle letlieval slot, 12. (If all MWD tool is IIOt used, tlle technique wollld still be similal, tlle Wllil~-AIlcl~ol selvice repleselltative jllst would not know whicl~ way the hook and wash polt wele facillg, alld tlial and ellol n~eans wollld 10 have to be llsed to wasll tlle slots all~ ook tl~e letlieval slot. Tllat is leciplocate tlle dlill stling, rotate 15 ~leglees, lecil~loc,lte tlle l~ all~l lel~eat.) Positive latcllillg of tlle hook in tlle slot will he il-clicate(l at tl~e s~llface l~y a sl,arp illcrease il~ mud plessule because tlle Illlld fiow tlllollgll tlle wasll polt llas beell stopl~e~ y tlle pleferled lise of the pistoll sleeve valve, 140, as desclibed l~leviollsly. If, llowevel, tlle alternate positive s latch indictol embodill~ellts ale ~Ise~l, 1ll~l~l flo\\~ will be stoppe~ y closllle of tlle llook valve, 203, wllich is colltlolle~l lly tlle llook val~e actllatol, 20~, beillg pllslled ill~valds when tlle llook flllly ellgages tlle letlieval slot; ol ~y closllle of tlle flappel valve, 201, wllich is controlled by tlle flappel val\~e actllatol, 20~, beillg l~llslle~ lwalds as tlle retrieval tool face plesses agaillst tlle settillg slot. A fllltllel illdication of positive o latching will be a "loss of weigllt" if tlle Wllil~-Allcllol selvice lepleselltative slacks off sliglltly, due to tlle BHA weigllt beillg call ie~ y tlle latclle~l llook oll tlle letlieval tool.
The Whip-AIlcllol selvice lepleselltative Illllst lelllelllbel Ilot to slack off gleatly or t~le latch ,..c ~ , 28, slleal pill will slleal: tllis will be covele~l later ill t11e discussioll.
Aher tlle letlieval tool plopelly ellgages tlle letlieval slot, illteractioll of tlle sloped slot 25 and hook will draw tlle back of tlle Wllil~-AIlcllol away flolll its close colltact witll tlle wellbole as sllowll ill Figllle l.SD as it lotates al~ollt tlle llillge assembly. (Tile ~lillge splings will compless dlle to tolsiollal folces abollt tlle offset llillge as tlle ancilol is dragged ollt oF tlle llole.) Tllis ellsllles Illal Ille lol~ of Ille Wllil~-AIlcllol will not catcl against casing joillts as it--Is tril~l~e~l ollt of tile llole. Acl(litiollally, tlle extla lellgtll of tlle 30 llook tllat plotllldes flolll tlle baci~ of tlle Wllil~-AIlcllol, will ai~l ill ledllcillg tlle possibility of sllaggillg a casillg joillt.
Ollce tlle hook llas ellgaged, tlle latcll l~ r~ icll1, 28, will ellsllle tllat tlle llook does llot collle ollt of tlle letlieval slot if 111~ Wllip-AIlcllol selvice representative w0 9s/23273 2 ~ 7 ~ ~i 8 ~

has to leciprocate tlle dlill stlillg ill oldel- to ll-ee tlle Wl~ip-AIlcllor. Ollce llook engagement llas occulled, tlle Wllip-AIlc11or selvice lepleselltative will slowly inclease the pllll on tlle dlill stem to tl~e poillt of klto\~ slip slleal sclew lelease force. The Actual p~lll force will be gleate~ tllal~ tlle slil~ slleal screw lelease force beca~lse of 5 wellbole frictioll. Once tlle slleal scle~vs l~ave sllealed tlle slips oll tlle anchor will release, tlle packing will colla~se, and tlle allcl-ol will flee iIself flolll tlle wellbole. All that the Wllip-Anchol service lepreselltative ll~llst ~lo is tlip ollt of tlle wellbole.
If the Wllip-AIlcllol llapl~ells to stick ill tlle ilole dlll illg t~le tl ip, tlle Wllip-AIlcllol service replesentative can llse tlle fisllillg jals to atten1pt to work tlle Whip-Anchor flee.
o The llydlalllic fisllillg jars mllst be leset, wllicll is ~lolle by applying weigllt on tile jars.
Tlle retlieval tool latcll pill ,.c~ .,. 28, (eitllel elllbodimellt as sl~owll in Figules i4A
ol 14B) is ~lesiglled to provide sllfficiellt stlellgtll (i.e. it will llot slleal) fol Ieset of the fishing jals. Tile teclllliqlies fol "fisllillg" stllck tools flol11 a welll)ole are well kllown and will not be discllssed ill tllis disclos~lle. 01l tlle otllel Ilall~, if tlle Wllip-AIlcllol becon1es s irretrievably stllck, tlle Wllip-AIlcllol selvice replesentative Illay apply sllfficient dow weight, wllicll not only resets tlle jals, I)llt will slleal tlle latcll pill. T~lis allows tlle retlieval tool llook, 117, to sliLle Ilowllwalcl all(l ollt of tlle letlieval slot. Tlle dlill stlillg sllould tllell l)e lotated alld lecil710cate~ l ol(lel to tulll tlle letlieval llook away from tlle retlieval slot. Followillg tllis, tlle cllill stlillg can be tlipl~e~l ollt of tlle llole alld tlle 20 stuck Wllil)-Allchol eitllel al)all~lolle~l ol Ietlie~e~l llsillg otllel well kllowll time collsun1ing alld expellsive fisllillg tecll~ llles.
Finally, it mllst be lealize~l tlle plesellt alt wllil~stocks llsing hydlalllic (or nn~ h ~nin~l) ancllol packels call be collvelted to illcoll~orate some of tlle saliellt featllles of tlle instal1t il1vel1tiol1 al1d sllcll coll~elsiol1 is collsi~leled to be witllin tlle scope of tllis 25 illveiltiol1. Tlle collvelsioll Illay l1e Illa~le by cllttillg a settil1g tool slot ill tl1e cllllent state of the alt wllipstock all~l llsil1g tlle tecl111i(l~les ~lesclibe~l al ove to set tlle convelted whipstock attaclle~l to eitllel a Illecllallical ol lly~llalllic packel. If tlle llsel desiles, a retlieval slot call be cllt in tlle wllillstock all~l tlle letrievalllc featllles of tlle above disclosule call be llsed. It is recollllllell~le~l tilat tlle tol) sectiol1 of existil1g alt wllipstocks 30 be cllt alld tlle deflectol plate of tlle illstallt illvelltioll l)e llse~l to ellsllle plopel stalting of the win~iow cllt. Altelllatively, tlle top sectioll of tlle wllil)stock tool face call be hardened to tlle eqllivalellt of tlle ~lellectol Ilea~l. It sllolll~l be lloted tllat collvelte~l wllipstocks call ollly l)e ~Ise~l ill tlle size of ~elll~ole fol wllicll tlley wele oligillally wo gs/23273 2 , 7 9 1 8 4 ~ ~ I ", ~ A7 .~ Q4 designed and will llave a "fllll bole'' cross-sectioll.
Tl~ele llas been disclosed lleletofole ill tl~e above cliscllssioll tlle best ~ or.7imP71t and best mode of tl~e present i~ elltio~ leselltly colltelllplated. It is to be ~ delstood that the exalllples givell alld tlle ~illlellsiolls Illay l)e cllallged, tllat dimellsiolls ale based 5 on stlellgtll ploperties of tlle l~latel ial cllosell to Illallllfactllle tlle Wllip-Ancllor, and tllat rnrfifjr71tio--Q can be Illade tlleleto witllollt depaitillg flom tl~e spilit of the plesent invention. Tile tables used ill tlle disclosllle ale collvelsiolls fiolll well kllow and pQt,l 1 ~ -1 values llsed in tlle oil illdllstly all~l ale based oll tlle Britisll System of Ullits.
Thus, tlle decimal point notatioll llsed ill tlle tables ~loes llot Illean tolelallce, bllt latller o indicates tlle closest Illetlic vallle to tlle estal~lislle~l oil fiel~l stall~lald Illlit of measllle.
Tl~e oligillal ANSI tables ale givell ill tlle sectioll followillg tlle Nllmbel Ill~lex.
Inventioll Drawin~ Nllmbel Ill~lex Terminology = Two colivelltiol~al ~ il)stocks ale availal)le.
PACK-STOC7.~TM alld BOTTOM TRIP
The Packstock is a wllil7~stock all~i l)ackel asselllbly collll)illatioll tl~at folms a single illteglal Illlit dowllllole. Note tllat Pack-StockrM is a tla~le llallle otllel tlade names ale llsed ill tlle ill~lllstly. 11l tllis patellt tlle tellll Wllip-AIlcllol (or ~o variants) will be llse~i to ~esc~ e tlle colllbillatioll of a wllipstock and its allcllo packel .
Tlle bottolll tlip llas a plllllgel tl~at sticks ollt of tlle bottolll of tlle wllipstock wllicll wllell set dowll oll tlle l~ottolll of tlle llole will lelease a splillg loa~le~l wedge/slip wllicll ill tlll ll sets ~lle tool.

001 Tlle Wllipstock Illvelltioll gellelall)~ - llo~ illclll~lillg allcllor-packe002 Tlle Wllil7stock Settillg Tool gellelally 003 Tlle Retlieval Tool gellelally 004 Top sectioll of wllipstock gellel ally 30 005 Bottolll sectioli of wllipstock gellelall 006 Hinge sectioll of v~llipstock gellel all)~
007 Defiectol llea~l sectioll of ~llil)stock gellelally 008 Tlle optiollal sl)acel wo gs/23273 _ 57 _ r~ 7 009 Wllipstock c~lt-a-way fol Ily~llalllic plessllle li~le 010 Tlle complete (lowllllole tool gellelall)~ - wllil)stock, llead, sl)acel, alld packe 011 Tlle cllpped face of tl~e wllipstock (too1 face si~le) 012 Retl ieval slot sectioll of \411il)stock genelally 5 013 Settillg slot sectioll of wllil)stock gellelally 0l411 Hydla~llic ancllol packer gellerally 014M Mecllallical ancllol packel generally 015 Cross-over sllb (betweell packel all~l wllipstock) 016 Rllnning tool (collvel-ts m~ld plessl~le to lly~llalllic plessllle) o 017 MWD tool 018 Otllel stl ing tools gellel ally 019 Uppel Hydlalllic passageway - witllill v~llipstock 020 Hydla~llic stleet-ell collllectioll witllill wllil~stock face 021 Hydlalllic stleet-ell collllectioll witllill wllil~stock back s 022 Hycllalllic stleet-ell collnectioll ~vitllill wllil)stock base 023 Hydralllic lille witllill llycllalllic cllt-a-way 024 Base Hydralllic passageway - ~itllill l)ase 025 Setting slot base (or bottolll) 026 Wllipstock/deflectol llea~l jOillt ill gelleral 2n 027 Locatioll of Retlieval Tool Slleal Pill Apeltllle ol Mecllallis 028 Retlieval Tool Latcll Pill Mecllallislll il~ ciellelal 029 Collventional Wllil)stock Plofile 030 Bolellole generally - call l~e casecl ol Illlcasecl 031 Casing 25 032 Cemellt betweell casillg allcl f(lllllatio 033 Ul)l)el Slil)s!Weclges 034 Lower Slips 035 Packillg 036 Bliclge Plllg 30 037 Keepel Rillg 038 Sllear Pil~ Gloove 039 Slleal Pi 0~0 Plio~ Alt - Sllcal Pil~ ~31ocl w09~23273 2 1 ~ q ~ ~4 041 Plior Alt - Staltirlg Mill Tape 042 Plior Alt - Startillg Mill 043 Prior Art - Shear Pin 044 Actual Deviated Bole Hole 5 0~5 PlaDned Deviated Bole liole 046 Second watermelon n~ill 047 First waterlllelon mill 048 Window Mill 049 Flllcrllm Point (a,ul ,u~ e) ol1 tool face ~o 050 Leadillg edge of deflectol plate 051 PCD Illserts 052 Joi2~t l)etweell Deflectol I lea~l all~l Wl~ stock Bo~
053 Retaillel Piils 054 Retaillel- Pin Hole s 055 Deflectol Head SJoped Si~e 056 DeflectorTool Face (colltillllatioll of 11) 057 C~llved back of Detlectol- i lead 058 Deflectol Ilead effective lellgtl 059 Deflectol Hea~ Ri~lge 20 060 Deflectol~wllipstock joillt llacksi~le ~el~l gap 061 Weld Bead 062 Slleal Pil~ Apel tllre 063 Slleal Pill Recess 064 Keepel Ring Gloove ~5 065 Deptll of Bottolll/Base of Settillg slot 066 Deptll of Retlieval slot 067 End of Tool Face 068 Tllleaded stll~l al~ertllle - oll ~ stùck l)ù~ly 069 Whipstock /joillt backsi~e wel~l gap o 070 Wllipstock Ri~lge 071 Wllipstock Tool Face (colltillllatioll o~
072 Spacer extell~le~l tool face (colltill~latioll o~ 11 ) 073 Spacel l~ack WO95123273 2 ~ 7 9 1 8 4 P~-l~ ?'1~i4 074 Spacel St~ld 075 Spacel Stud opel~ing 076 Spacer base lengtl 077 Spacer deptl~
s 078 Spacer lengtl 079 Spacer widtl 080 ~ ge pin opelling ~ pel sectio 081 Hinge pin openil~g - base sectio 082 Hinge section - uppel- section o 083 Rigllt Splillg opel~ g - llpl~el sectio 084 Left Sprillg opel1ing - llpper sec~io 085 Rigllt sprillg opel~ g - I~ase 086 Left spling opelling - base 087 Hillge Pi s 088 Spl-illg letai~lel slleal pill 089 Sloped back of llillge l ase 090 Top sloped back of llillge base 091 Hinge Pin sllap ling 092 Hillge Pin Sllap Rillg Glo~e 20 093 Spling retaillel sllap lillg 094 splillg letaillel sllal) lillg glove 095 Hillge spl illg 096 Splillg letail~el slleal I~ill ol~ellillg ~ pel sectio 097 Sprillg letaillel slleal pill opellillg - I~ase sectio 25 098 Hillge sectioll - base sectio 099 Casillg Illitial Cllt Poillt 100 Settillg Tool S
101 Settillg Tool Rectallglllal 13a ~07 Settillg Tool Fllli~l Lillc ol T~ lla 30 103 Weld bet~eell Bar all(~ Fl-li~l LillerPIlbllla 104 Weld betweell bal/lille all(l slll 105 Slleal Pill Tllleacled Apeltllle ill setti21g tool l>a 106 Settillg Tool bottolll face nllolc 2 1; 7~ t 84 w0 95/23273 . ~ C~
.

]07 Opell el~d of flllid lille - tl~lea(le~i felllale 108 Bottolll Face of Settillg Tool 109 Setting Tool Lengt~l (n1easllled flom sllb) 110 Hydraulic Hose Male Fittillg 5 111 Setting Tube Recess ol Offset 112 Setting Tool Threaded Tllb-llar Recess 113S Hydla~llic Hose - Sllolt (Plefellecl l13L Hydralllic Hose - Lollg (Alterl~ate) 114 Stainless Steel Hydlalllic Hose Stlap 116 Fisllillg Jars 117 By-pass Valve (Illlpilllled) 118 Stabilize 119 Single Dlill Colla 15 120 Dlill Stliilg 121 Drill Collals 122 Olle Joint Higll Grade Drill Pil~e 123 Col11bil~ation of 1~0, 121 al1(1 1~ - III~Pel Stl;l1g aSSel11blY
124 Cross-over sllb 20 1~5 ClOSS-OVel Sllb 126 Ol;el1tatjOlj Sllb 127 MWD tool 128 Pillned by-pass valve tool (ol s~
129 Sholt sllb (for fillillg pistoll sllb) ,5 130 LOWe1 Sllb 131 P;StOII
132 Pistoll O-lillg alld Gloove 133 C;rCIIIat;Oll CIIaIIIIeI(S) 134 Pistoll Riser 30 135 Riser Cap 136 Enlarged Pistoll Lalldillg 137 Risel Opening WO9S/23273 2 ~ 7~ ~ 8~ PCT/U595102254 139 Closs ra~
140 Optional Pistol~ Va1ve (ol Slee~e Valve) ill Gellelal 141 Tool Joillt 142 Tool joint flilid passage s 143 Hydralllic Street-ell 144 Hydralllic lligll Plessllle Hose 145 Bllttress Thleaded Col~llectiol- fol Access to Pistol] Valve 146 Pistoll valve 147 Piston valve ril gs o 148 Piston valve spring 149 Piston valve extellsion, attaclles to letlieval tool 150 Heavy Allows sllowing fllli~l n..
151 Pistoll valve Splille 152 Pistoll valve Splille 153 pistol~ valve Splil~e 154 Piston valve llead 155 Lower piston valve sleeve 156 Uppel pistol- valve sleeve 157 Piston valve cel~tlal fllli(l l~assage ~o 158 Pistol~ valve ClOSS fluid l~assage 159 Pistoll valve seal poillt 160 T~e Retrieval Tool ~ellelally (w/o top wolks) 161 Lellgtlls of Tool 162 "
163 "
164 "
165 "
166 ~
167 '' 30 168 Lel~gtl~s of Tool 169 "
170 ~
171 "

w09s/23273 2 1 79 1 8~

172 "
173 "
174 "
175 Wash Port , 176 Wasll Poa ..
177 Hook 178 Retlieval BAr 179 Retlieval Tool Recess or Offset 180 Retlieval Tool Top S~
o 181 Flllid Passageway 182 Threaded opellillg 183 Retlieval Tool Hydra~llic Hose 184 Stail~less Steel Hydralllic Hose Retaillel Clamp 185 Hydl alllic Street-ell ~s 186 Tl~leaded ol Slllootll T~ lal Ol~el~ g 187 Reilieval Tool Tllbllla 188 Weld 189 Tllblllar Plllg 190 Prolectol Plate 20 191 Tool Joillt 192 Tllblllal 193 Passageway 194 Thleacled Collllectio 195 Flapper Valve Sleeve 2s 196 Flappel Valve Passageway all~l llol(lel-197 Illtelllal Fllli~l Passage 198 Clllved lowel botto 199 Slol)c~l face of llook 200 ~look Wcld to Tllbllla 30 201 Flappel Valve 202 Flappel valve Actllato 203 Hook Valve 204 Hook Val~e Actllato W09s/23273 2 ~ P~ JI(~S4 .

205 Plotectol Plate Weld Bea~
206 Retlieval Tool Latc11 Pill 207 Retlieval Tool Latcll Spling 208 Retrieval Tool Latcl~ Pil~ Retaillel s 209 Retlieval Tool Latcll Apeltllle - pill all(l splillg side ill WHIP-ANCHOR
210 Retlieval Tool Latcll Pill Ol~ellillg - ol~ellillg side il~ Retlieval Tool 211 Retlieval Tool Latcll Apeltllle - I~il1 all(l splillg side ill Retlieval Tool 212 Retrieval Tool Latcll Pill Ol~ellillg - ol~ellillg side ill WHIP-ANCHOR

Tlle followillg ANSI TABLES ale l~lovi~led ill ~lle oil ill(lllstly stalldald Illlits of measll~e wllich are based oll tlle Blitisll Syste~ll of U~lits. Di~llensio~ls a~-e givell i~l inches unless otlle~wise noted ill tlle tables. Celtai~l st~ess vall~es a~e givell ill po~ l-fo~ce.

WIIIP-ANCHOR TYrE (on ~ 1 AND PARAI\IETERS
lypc l~o-ly Siic l:ils l~lr~ Si~ I:ils ( llqill~ Si~:c 1~ cc Wl~ s~ock Ill~llcs Illcllcs All~lc Curvrllurc zo = .
3% 3~ /2 11~2 - 65/5 2.09= ~/2 ll S~/2 ~ 7 - ~V8 2(~7O
111 8 ~ l/y ~)5~2- I.~J/5 3.1~ 2 C o~ r IIS IICC~IC~I
2s _;
ANSI 1`~01.1~ 1 W095/23273 2 1 79 t LP,4 r~ n77~i DEFI,ECTOR IIEAI) I~AI~AI~1ETERS
Wlllr-AN(`ll()l~ S~ 'llt~ 'iliCkllc.59 U
s 'I`yl~e alld S;~,c (`OllllCCtiOII
I - 3~/2" 01) ~ ) 1 7j3/,~ I/
Il - 5~/~ ()1) 2.62 161/2r J~,~
111- 8' 01) 3.1~1 18" 1' ANSI TAiil.E t SETTING TOOL l~ARAI~IETERS
Wllll'-ANt-ll()li Slol~ S~llillt~ liCkllCss lo l)~flcc~ioll of Iyl)c allLI Si~c l.cllulll, WiLIIll, I)cl~ liack ol l~lol Millill~L~ ol --3 /2 0 1~ 2. ()9 /. x I 11l x () ~ ¦ I/2N I .3 1 2011 - 51/2~ t~)l) 2.6~ 19~/2~ x 1~ x ().~J(~ 4~ 1.65 111 - 8" 01) 3.1~ 1~" x 2~1, " x 1~ 1" 2.(1(~
.~NSI T.~UI E 3 2s OrTlONAL Sl~ACEI~ rARAl\lETERS
Wllil~stock (`asill ~ -rc S ~ cr (`ulvc '1~ 1 Iacc Iypc Si~c Si~c .~ c l)c)~tl~ lck ~`ul~ all~l Slol)c 3~/2 I~/2 - 6% 33/4 - 1l~2 (~ NA NA nt NA
3~/2 il/2 - 6% ~3/, 5l/2 I/2 31/2 Sl/2 3t 2.(19 Il 51/2 7 - 85/c 53fi - 7 0 NA NA ut NA
11 5~/2 7 - 85~c 7~/ - t; 5/5 5l/2 ~; 3t 7.6 111 89Vc- 133/. .~"/.- 1~) () NA NA ;It NA
111 8~%- 133/. )~)-11 ) ~ 12~/2at 3.1~
111 8~)V5 - 133/a I l l/2 - 121/2 ~3/4 1; 17~/2 r~t 3.18 ANSI TAI~LE -i SIIEAR STUn I~I.ACEI~lF,N-i AND SEl~`IN~ Sl.OT n.~SE rARAl~lETERS

4~5 W~ -St~-Ck StllLi Sl.~ 01 Sl.-l Ul~ IrOI~ .5c Stll~l Si~c Si;~c wi~ I)cl-lll I.c~ 1 sl-" 1)-'1-111 l/2" 1~ t.~ll 2~lJ~- 1" 3/a~
SO 11 5/~ 7!;~ /2~ /
1113/~ 7'!~ I '/
ANSI T.~lil.l~ 5 3~
WO 95~23273 PCTIUS95/02254 -- 65 ~
ADDITIONAL SETTING TOOL PARAMETERS
Whipstock'Iype 13arlool l:lui~ lol-Sul)OI) Sl~rlrSIud or Sizo Lo~ , Widlll, I)CI1III S~ & Collllecti~ Si~e -- 3 /2 O D 40 x I x I % - mn() I s I ~ /3 w/ 2Vs 1 1~13 /2 Il -- 5 /2 Ol) 4() x I /2 x I /~ Y~ -- 4(~()() I Sl 4 /~ w/ 3 /2 11 1~ y3N
111 - 8 Ol) 40 x 2 x ll/2~ o()() I'SI 61/2" w/ 4~/2 11 1~ 3/
- lo ANSI TABI E G
RETRIEVAL TOOI. 1)11\1ENSIONS
s Wllip-AI~cllor 'l~ool rOol 11~ llo~ Wasll M~lcri:~l Top Lalcll llool;
Srzo I cll~t~ Wi~lll I)cl7111 Wi~ Slr-~ clio~l ol) All~c 54~ 3~/2~ 1" 1~ x l/2~ In(lli 23/~ 13 1/,~ 35O
Il 56" 51/2~ Il/2" I~/2~ x ~ S~ 3h~ 1201; 2~/2" 11:1~ 3/8~ 35 20 111 5~" 71/2- z~ 2ux ll/2" 6~ I/2 ~6()1i ,II/2u 11~ /2~ 35 ANSl T.~BI E 7 ~5 SIIEAR PULI, ~/ALUES
= _ .
-AIlcll~r Si~- 130r~ gi~ S~ lr slu~ si~,~ A,017roxi~ Sllc2r l~orcc~
31/2~ Ol) 33/~= - 51/2" '/2" x 1- 1~ 1ll 1(1, 15 & 20,(~00 poullds 30 11 5~/2N 0l) s2/4~ %ll x l ~/~- lcll~lll 20, 25 & 30,000 poullds 111 ~" 01) ~ /2" V~~ x l ~/2"1~ll9l1l ~0, 35, 40 & 45.000 I)oullds ~ vgrics willl Wllip-al~cllor sizc AN51 TABI.E %
3s The ~bove t~bles llave beell plovi~le~ ~o ai~l ~lle le~clel, wllo is skilled ill tl~e alt of oil field eq~liplllellt, by plovi~ g tlle ol-igil~ ool ~I)les ill ANSI stalld:~rd Illlits.

Claims (131)

The Claims

1. A whip-anchor assembly for lowering into a wellbore on a drill string for orientating and anchoring the whip-anchor assembly in the wellbore in a single trip by manipulating the drill string, comprising:
a whipstock, having a tool face, secured to an anchor packer;
an elongated setting slot formed in said tool face of said whipstock;
a setting tool releasably secured within said setting slot; and with said setting tool secured to the drill string.

2. A whip-anchor assembly for lowering into a wellbore on a drill string for orientating and anchoring the whip-anchor assembly in the wellbore in a single trip by manipulating the drill string, comprising:
a whipstock adapted for securing to an anchor packer having a back side, a tool face, a top, a bottom, a longitudinal central axis and a hinge section located within said whipstock near said bottom end thereof with said hinge section dividing said whipstock into a top section and a bottom section; and, an elongate setting slot formed in said whipstock having a rear wall, a front side, an apex and a base, extending into said whipstock from said tool face thereof and extending from near said top of said whipstock toward said bottom thereof, terminating about midway between said top and said bottom of said whipstock wherein said rear wall of said setting slot is generally parallel to said back side of said whipstock and with said rear wall generally positioned near said longitudinal central axis of said whipstock, such that said front side of said setting slot is an opening within said tool face of said whipstock and such that said base of said setting slot is generally perpendicular to both said rear wall of said setting slot and said back side of said whipstock; and, a setting tool releasably secured within said setting slot with said setting tool to be secured to the drill string.

3. The whip-anchor assembly of Claim 2 wherein the tool face of said whipstock is hardened.

4. The whip-anchor assembly of Claim 2 wherein said top section of said whipstock further includes opposed substantially planar side walls extending between said back side and said tool face and extending along the length of said top section in generally parallel relation to said longitudinal central axis of said whipstock.

5. The whip-anchor assembly of Claim 4 wherein said setting slot has opposed side walls extending from said top of said setting slot to said base of said setting slot, said opposed side walls extending between said back wall and said tool face, generally disposed on either side of said longitudinal central axis of said whipstock and extending between said top of said whipstock toward said bottom thereof.

6. The whip-anchor assembly of Claim 5 wherein said rear wall of said setting slot is generally positioned near said extended longitudinal central axis.

7. The whip-anchor assembly of Claim 6 wherein said base of said setting slot extends from rear wall thereof toward said front side of said setting slot within said tool face of said whipstock and wherein said base has a length within a range of about 1.27 centimeters [0.5"]
to about 5 centimeters [2"] so as to provide sufficient area to withstand setting forces imposed upon said base.

8. The whip-anchor assembly of Claim 6 wherein said base of said setting slot extends from said tool face of said whipstock beyond said extended longitudinal central axis toward said back of said whipstock, thus forming an extended base, and wherein a portion of said rear wall of said setting slot adjacent to said base extends at an acute angle relative to said longitudinal central axis to meet said base.

9. The whip-anchor assembly of Claim 7 wherein the distance between said opposed side walls is within the range of about 6.35 millimeters [0.25"] to about 7.7 centimeters [3"].

10. The whip-anchor assembly of Claim 8 wherein the distance between said opposed side walls is within the range of about 6.35 millimeters [0.25"] to about 7.7 centimeters [3"] and wherein said extended base has a length within a range of about 1.9 centimeters [0.75"] to about 7.7 centimeters [3"] so as to provide sufficient area to withstand setting forces imposed upon said base.

11. The whip-anchor assembly of Claim 6 further comprising a retrieval slot having opposed side walls, a bottom wall and a top wall, extending from said rear wall of said setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said setting slot.

12. The whip-anchor assembly of Claim 8 further comprising a retrieval slot having opposed side walls, a bottom wall and a top wall, extending from said rear wall of said setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said setting slot.

13. The whip-anchor assembly of Claim 4 wherein said setting tool comprises a rectangular bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received within said setting slot.

14. The whip-anchor assembly of Claim 13 wherein said setting tool is attached to a top sub at said top end of said bar.

15. The whip-anchor assembly of Claim 14 wherein said setting tool further comprises a tubular member having a top end and a bottom end, attached to the front side of said bar and extending from said top sub to said bottom end of said bar, said tubular member being in communication with said top sub.

16. The whip-anchor assembly of Claim 15 wherein said bottom end of said tubular member is adapted to receive a hydraulic fitting at said bottom end.

17. The whip-anchor assembly of Claim 14 wherein said top sub is adapted to receive a hydraulic fitting in communication therewith.

18. The whip-anchor assembly of Claim 16 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said setting slot an acute angle of up to 3 degrees exists between a plane including said base of said setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said setting slot a gap exists between said bottom end of said bar and said base of said setting slot near said tool face of said whipstock.

19. The whip-anchor assembly of Claim 17 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said setting slot an acute angle of up to 3 degrees exists between a plane including said base of said setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said setting slot a gap exists between said bottom end of said bar and said base of said setting slot near said tool face of said whipstock.

20. The whip-anchor assembly of Claim 18 wherein said acute angle is not greater than 0.3 degrees.

21. The whip-anchor assembly of Claim 19 wherein said acute angle is not greater than 0.3 degrees.

22. The whip-anchor assembly of Claim 13 further comprising a shear pin assembly for releasably securing said setting tool to said whipstock said shear pin assembly comprising:
a shear pin aperture centered within said rear wall of said setting slot near said base thereof;
a shear pin threaded aperture centered between said side walls of said setting tool bar extending into said back side thereof in coaxial alignment with said shear pin aperture and said shear pin threaded aperture with said bar received in said setting slot;
a shear pin connected within said shear pin threaded aperture and extending therefrom into said shear pin aperture.

23. The whip-anchor assembly of Claim 22 wherein said shear pin aperture is slightly greater in cross-sectional diameter than said shear pin such that said shear pin fits loosely within said shear pin aperture.

24. The whip-anchor assembly of Claim 22 further comprising a shear pin restraining means within said shear pin aperture.

25. The whip-anchor assembly of Claim 23 further comprising a shear pin restraining means within said shear pin aperture.

26. The whip-anchor assembly of Claim 4 further comprising a deflector head assembly attached near said top end of said whipstock.

27. The whip-anchor assembly of Claim 26 wherein said deflector head assembly has a tool face and a back side, said tool face and said back side thereof forming a continuous extension of said back side and said tool face of said whipstock and further comprising a hardened tool face on said deflector head assembly.

28. The whip-anchor assembly of Claim 27 wherein a plurality of polycrystaline diamonds are inserted into said tool face of said deflector head.

29. The whip-anchor assembly of Claim 4 wherein said hinge section further comprises a hinge means rotating about a line of rotation parallel to said tool face and perpendicular to said longitudinal central axis and offset from said longitudinal central axis towards said tool face.

30. The whip-anchor assembly of Claim 29 wherein said hinge means includes a hinge pin in co-axial alignment with said line of rotation and wherein the distance of said offset is about 2 centimeters [3/4"].

31. The whip-anchor assembly of Claim 30 wherein said hinge section further comprises spring means disposed between said top section and said bottom section whereby said top section is biased away from said bottom section about said hinge means towards said back side thereof.

32. The whip-anchor assembly of Claim 31 wherein said hinge section further comprises shearable locking means restraining said top section from rotational movement relative to said bottom section.

33. The whip-anchor assembly of Claim 29 wherein said whipstock has a hollow base section and wherein said whipstock further comprises a cut-a-way formed in the center of the back side of said whipstock, having an upper end disposed within the upper one-third of said top section and a lower end disposed within the upper one-half of said bottom section, an upper hydraulic passageway running from said upper end of said cut-a-way to said tool face and a base hydraulic passageway running from said lower end of said cut-a-way to said hollow base.

34. The whip-anchor assembly of Claim 33 further comprising a hydraulic line positioned within said cut-a-way and connected at its respective ends to said upper hydraulic passageway and said base hydraulic passageway.

35. The whip-anchor assembly of Claim 11 wherein said bottom wall of said retrieval slot is disposed about 3. 8 centimeters [ 1.5"] to about 6.35 centimeters [2.5"]
above said base of said setting slot in said rear wall thereof and said top wall of said retrieval slot is disposed about 29 centimeters [11.5"] to about 31.8 centimeters [12.5"] above said base of said setting slot in said rear wall thereof, said bottom wall and said top wall being parallel to each other.

36. The whip-anchor assembly of Claim 12 wherein said bottom wall of said retrieval slot is disposed about 3.8 centimeters [1.5"] to about 6.35 centimeters [2.5"]
above said base of said setting slot in said rear wall thereof and said top wall of said retrieval slot is disposed about 29 centimeters [11.5"] to about 31.8 centimeters [12.5"] above said base of said setting slot in said rear wall thereof, said bottom wall and said top wall being parallel to each other.

37. The whip-anchor assembly of Claim 11 wherein said bottom and top wall are at a 35 degree relationship to said base of said setting slot.

38. The whip-anchor assembly of Claim 12 wherein said bottom and top wall are at a 35 degree relationship to said base of said setting slot.

39. The whip-anchor assembly of Claim 11 further comprising a retrieval tool latching mechanism located within said rear wall of said setting slot near said top wall of said retrieval slot.

40. The whip-anchor assembly of Claim 39 wherein said latching mechanism comprises a spring loaded shear pin for engagement in an elongated slot.

41. The whip-anchor assembly of Claim 39 wherein said latching mechanism comprises an elongated slot for receiving a latch pin.

42. A wellbore deviation assembly for lowering into a wellbore on a drill string for orientating and anchoring the wellbore deviation assembly in the wellbore in a single trip by manipulating the drill string, comprising:
a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis; and, an elongate setting slot formed in said whipstock having a rear wall, a front side, an apex and a base, extending into said whipstock from said tool face thereof and extending from near said top of said whipstock toward said bottom thereof such that said front side of said elongate setting slot is an opening within said tool face of said whipstock.

43. The wellbore deviation assembly of Claim 42 wherein said elongate setting slot terminates about midway between said top and said bottom of said whipstock such that said rear wall of said elongate setting slot is generally aligned with said back side of said whipstock and with said rear wall generally positioned near said longitudinal central axis of said whipstock and such that said base of said elongate setting slot is generally perpendicular to both said rear wall of said elongate setting slot and said back side of said whipstock.

44. The wellbore deviation assembly of Claim 42 wherein the tool face of said whipstock is hardened.

45. The wellbore deviation assembly of Claim 44 wherein said hardened tool face is produced by lacing said tool face with a tungsten-carbide compound such as Clusterite.

46. The wellbore deviation assembly of Claim 44 wherein said hardened tool face is produced by melting a tungsten-carbide compound such as smooth Clusterite onto said tool face.

47. The wellbore deviation assembly of Claim 42 further comprising a deflector assembly having a back side and a tool face, said deflector being attached to said top of said whipstock above said apex of said elongate setting slot such that said back side of said deflector assembly forms an extension of said back side of said whipstock and such that said tool face of said deflector assembly forms an extension of said tool face of said whipstock.

48. The wellbore deviation assembly of Claim 47 wherein said tool face of said deflector assembly is hardened.

49. The wellbore deviation assembly of Claim 48 wherein said hardened deflector tool face is produced by lacing said deflector tool face with a tungsten-carbide compound such as Clusterite.

50. The wellbore deviation assembly of Claim 48 wherein said hardened deflector tool face is produced by melting a tungsten-carbide compound such as smooth Clusterite onto said deflector tool face.

51. The wellbore deviation assembly of Claim 47 wherein a plurality of polycrystaline diamonds are inserted into said tool face of said deflector head.

52. The wellbore deviation assembly of Claim 42 further comprising a hinge section located within said whipstock near said bottom end thereof, said hinge section dividing said whipstock into a top section and a bottom section.

53. The wellbore deviation assembly of Claim 52 wherein said top section of said whipstock further includes opposed substantially planar side walls extending between said back side and said tool face and extending along the length of said top section in generally parallel relation to said longitudinal central axis of said whipstock.

54. The wellbore deviation assembly of Claim 42 further comprising a setting tool releasably secured within said elongate setting slot with said setting tool to be secured to the drill string.

55. The wellbore deviation assembly of Claim 42 wherein said elongate setting slot has opposed side walls extending from said top of said elongate setting slot to said base of said elongate setting slot, said opposed side walls extending between said back wall and said tool face, generally disposed on either side of said longitudinal central axis of said whipstock and extending between said top of said whipstock to ward said bottom thereof.

56. The wellbore deviation assembly of Claim 43 wherein said base of said elongate setting slot extends from rear wall thereof toward said front side of said elongate setting slot within said tool face of said whipstock and wherein said base has a length within a range of about 1.27 centimeters [0.5 "] to about 5 centimeters [2"] so as to provide sufficient area to withstand setting forces imposed upon said base.

57. The wellbore deviation assembly of Claim 55 wherein the distance between said opposed side walls is within the range of about 6.35 millimeters [0.25"] to about 7.7 centimeters [3"].

58. The wellbore deviation assembly of Claim 55 further comprising a retrieval slot having opposed side walls, a bottom wall and a top wall, and extending from said rear wall of said elongate setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said elongate setting slot.

59. The wellbore deviation assembly of Claim 54 wherein said setting tool comprises a bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received within said elongate setting slot and adapted to be secured to the drill string.

60. The wellbore deviation assembly of Claim 59 further comprising a shear pin assembly for releasably securing said setting tool to said wellbore deviation assembly said shear pin assembly comprising:
a shear pin aperture centered within said rear wall of said elongate setting slot near said base thereof;
a shear pin threaded aperture centered between said side walls of said bar extending into said back side thereof in coaxial alignment with said shear pin aperture and said shear pin threaded aperture with said bar received in said elongate setting slot;
a shear pin connected within said shear pin threaded aperture and extending therefrom into said shear pin aperture.

61. The wellbore deviation assembly of Claim 60 wherein said shear pin aperture is slightly greater in cross-sectional diameter than said shear pin such that said shear pin fits loosely within said shear pin aperture.

62. The wellbore deviation assembly of Claim 60 further comprising a shear pin restraining means within said shear pin aperture.

63. The wellbore deviation assembly of Claim 61 further comprising a shear pin restraining means within said shear pin aperture.

64. The wellbore deviation assembly of Claim 52 wherein said hinge section further comprises a hinge means rotating about a line of rotation parallel to said tool face and perpendicular to said longitudinal central axis and offset from said longitudinal central axis towards said tool face.

65. The wellbore deviation assembly of Claim 64 wherein said hinge means includes a hinge pin in co-axial alignment with said line of rotation and wherein the distance of said offset is about 2 centimeters [3/4"].

66. The wellbore deviation assembly of Claim 65 wherein said hinge section further comprises spring means disposed between said top section and said bottom section whereby said top section is biased away from said bottom section about said hinge means towards said back side thereof.

67. The wellbore deviation assembly of Claim 66 wherein said hinge section further comprises shearable locking means restraining said top section from rotational movement relative to said bottom section.

68. The wellbore deviation assembly of Claim 52 wherein said whipstock has a hollow base section and wherein said whipstock further comprises a cut-a-way formed in the center of the back side of said whipstock, having an upper end disposed within the upper one-third of said top section and a lower end disposed within the lower one-half of said bottom section, an upper hydraulic passageway running from said upper end of said cut-a-way to said tool face and a base hydraulic passageway running from said lower end of said cut-a-way to said hollow base.

69. The wellbore deviation assembly of Claim 68 further comprising a hydraulic line positioned within said cut-a-way and connected at its respective ends to said upper hydraulic passageway and to said base hydraulic passageway.

70. A wellbore deviation assembly for lowering into a wellbore on a drill string for orientating and anchoring the wellbore deviation assembly in the wellbore in a single trip by manipulating the drill string, comprising:
a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis, and wherein said top section of said whipstock further includes opposed substantially planar side walls extending between said back side and said tool face and extending along the length of said top section in generally parallel relation to said longitudinal central axis of said whipstock;
an elongate setting slot formed in said whipstock having a rear wall, a front side, an apex and a base, extending into said whipstock from said tool face thereof and extending from near said top of said whipstock toward said bottom thereof, terminating about midway between said top and said bottom of said whipstock wherein said rear wall of said elongate setting slot is generally parallel to said back side of said whipstock and with said rear wall generally positioned near said longitudinal central axis of said whipstock, such that said front side of said elongate setting slot is an opening within said tool face of said whipstock and such that said base of said elongate setting slot is generally perpendicular to both said rear wall of said elongate setting slot and said back side of said whipstock and wherein said elongate setting slot has opposed side walls extending from said top thereof to said base thereof, said opposed side walls extending between said back wall and said tool face, generally disposed on either side of said longitudinal central axis of said whipstock and extending between said top of said whipstock toward said bottom thereof with said elongate setting slot capable of accepting a rectilinear setting tool releasably secured within said elongate setting slot with said rectilinear setting tool to be secured to the drill string;
a retrieval slot having opposed side walls, a bottom wall and a top wall, and extending from said rear wall of said elongate setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said elongate setting slot, with said retrieval slot capable of accepting a retrieval tool to be secured to the drill string;
a deflector assembly having a back side and a tool face, said deflector being attached to said top of said whipstock above said apex of said elongate setting slot such that said back side of said deflector assembly forms an extension of said back side of said whipstock and such that said tool face of said deflector assembly forms an extension of said tool face of said whipstock;
a hinge section located within said whipstock near said bottom end thereof, said hinge section dividing said whipstock into a top section and a bottom section, and wherein said hinge section contains hinge means rotating about a line of rotation parallel to said tool face and perpendicular to said longitudinal central axis and offset from said longitudinal central axis towards said tool face;
a cut-a-way formed in the center of the back side of said whipstock, having an upper end disposed within the upper one-third of said top section and a lower end disposed within the lower one-half of said bottom section;
an upper hydraulic passageway running from said upper end of said cut-a-way to said tool face; and, a base hydraulic passageway running from said lower end of said cut-a-way to a hollow base located with said bottom section of said whipstock.

71. The wellbore deviation assembly of Claim 70 wherein said hinge means includes a hinge pin in co-axial alignment with said line of rotation and wherein the distance of said offset is about 2 centimeters [3/4"].

72. The wellbore deviation assembly of Claim 71 wherein said hinge section further comprises spring means disposed between said top section and said bottom section whereby said top section is biased away from said bottom section about said hinge means towards said back side thereof.

73. The wellbore deviation assembly of Claim 72 wherein said hinge section further comprises shearable locking means restraining said top section from rotational movement relative to said bottom section.

74. The wellbore deviation assembly of Claim 70 wherein the tool face of said whipstock is hardened.

75. The wellbore deviation assembly of Claim 74 wherein said hardened tool face is produced by lacing said tool face with a tungsten-carbide compound such as Clusterite.

76. The wellbore deviation assembly of Claim 74 wherein said hardened tool face is produced by melting a tungsten-carbide compound such as smooth Clusterite onto said tool face.

77. The wellbore deviation assembly of Claim 70 wherein said tool face of said deflector assembly is hardened.

78. The wellbore deviation assembly of Claim 77 wherein said hardened deflector tool face is produced by lacing said deflector tool face with a tungsten-carbide compound such as Clusterite.

79. The wellbore deviation assembly of Claim 77 wherein said hardened deflector tool face is produced by melting a tungsten-carbide compound such as smooth Clusterite onto said deflector tool face.

80. The wellbore deviation assembly of Claim 70 further comprising a retrieval tool latching mechanism located within said rear wall of said elongate setting slot near said top wall of said retrieval slot.

81. The wellbore deviation assembly of Claim 80 wherein said latching mechanism comprises a spring loaded shear pin for engagement in an elongated slot.

82. The wellbore deviation assembly of Claim 80 wherein said latching mechanism comprises an elongated slot for receiving a latch pin.

83. An improvement to a whipstock assembly adapted for securing to an anchor packer for lowering into a wellbore on a drill string for orientating and anchoring the assembly in the wellbore in a single trip by manipulating the drill string, the whipstock having a back side, a tool face, a top, a bottom and a longitudinal central axis, wherein the improvement comprises:
an elongated setting slot formed in the whipstock, wherein said elongated setting slot has a rear wall, a front side, an apex and a base, and wherein said elongated setting slot extends into said tool face thereof and extends from near the top of the whipstock toward the bottom thereof and such that said front side of said elongate setting slot is an opening within said tool face of the whipstock with said elongated setting slot capable of accepting a rectilinear setting tool releasably secured within said elongate setting slot with said rectilinear setting tool to be secured to the drill string.

84. The improvement to the whipstock assembly of Claim 83 wherein said elongated setting slot terminates about midway between the top and the bottom of the whipstock, such that said rear wall of said elongated setting slot is generally aligned with the back side of the whipstock and generally positioned near the longitudinal central axis of the whipstock, and such that said base of said elongated setting slot is generally perpendicular to both said rear wall of said elongated setting slot and the back side of the whipstock.

85. The improved assembly of Claim 83 further comprising a setting tool releasably secured within said elongated setting slot, wherein said setting tool comprises a bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received and releasably secured within said elongated setting slot, said setting tool to be secured to the drill string.

86. The improved assembly of Claim 83 further comprising a deflector head assembly attached near the top end of the whipstock.

87. The improved assembly of Claim 83 wherein approximately the upper one-third of the top section of said whipstock is replaced with a deflector head assembly.

88. The improved assembly of Claim 83 wherein at least the upper one-third of the tool face of the whipstock is hardened.

89. The wellbore deviation assembly of Claim 88 wherein said hardened whipstock tool face is produced by lacing the tool face with a tungsten-carbide compound such as Clusterite.

90. The wellbore deviation assembly of Claim 88 wherein said hardened whipstock tool face is produced by melting a tungsten-carbide compound such as smooth Clusterite onto said the tool face.

91. The improved assembly of Claim 86 wherein said deflector head assembly has a tool face and a back side, said tool face and said back side thereof forming a continuous extension of said back side and said tool face of said whipstock.

92. The improved assembly of Claim 91 wherein said tool face on said deflector head assembly is hardened.

93. The improved assembly of Claim 91 wherein a plurality of polycrystaline diamonds are inserted into said tool face of said deflector head.

94. The improvement to the whipstock assembly of Claim 83 wherein said elongated setting slot terminates about midway between said top and said bottom of said whipstock and further wherein said rear wall of said elongated setting slot is generally parallel to said back side of said whipstock, with said rear wall generally positioned near said longitudinal central axis of said whipstock, such that said base of said elongated setting slot is generally perpendicular to both said rear wall of said elongated setting slot and said back side of said whipstock and further wherein said elongated setting slot has opposed side walls extending from said top thereof to said base thereof, said opposed side walls extending between said back wall and said tool face, generally disposed on either side of said longitudinal central axis of said whipstock and extending between said top of said whipstock toward said bottom thereof; and further having a retrieval slot having opposed side walls, a bottom wall and a top wall, and extending from said rear wall of said elongated setting slot to said back side of said whipstock such that said opposed side walls of said retrieval slot form an extension of said opposed side walls of said elongated setting slot, with said retrieval slot capable of accepting a retrieval tool to be secured to the drill string;

95. The wellbore deviation assembly of Claim 94 further comprising a retrieval tool latching mechanism located within said rear wall of said elongated setting slot near said top wall of said retrieval slot.

96. The wellbore deviation assembly of Claim 95 wherein said latching mechanism comprises a spring loaded shear pin for engagement in an elongated slot.

97. The wellbore deviation assembly of Claim 95 wherein said latching mechanism comprises an elongated slot for receiving a latch pin.

98. A rectilinear setting tool for use with a slotted face wellbore deviation assembly which includes a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis; and having an elongate setting slot having a rear wall, a front side, an apex and a base, extending into the whipstock from said tool face thereof and extending from near said top of the whipstock toward said bottom thereof such that the front side of the elongate setting slot is an opening within the tool face of the whipstock;
comprising:

a bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received and releasably secured within the elongate setting slot.

99. The rectilinear setting tool of Claim 98 wherein said rectilinear setting tool is attached to a top sub at said top end of said bar.

100. The rectilinear setting tool of Claim 99 wherein said rectilinear setting tool further comprises a tubular member having a top end and a bottom end, attached to the front side of said bar and extending from said top sub to said bottom end of said bar, said tubular member being in communication with said top sub.

101. The rectilinear setting tool of Claim 100 wherein said bottom end of said tubular member is adapted to receive a hydraulic fitting at said bottom end.

102. The rectilinear setting tool of Claim 99 wherein said top sub is adapted to receive a hydraulic fitting in communication therewith.

103. The rectilinear setting tool of Claim 101 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said elongate setting slot an acute angle of up to 3 degrees exists between a plane including said base of said elongate setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said elongate setting slot a gap exists between said bottom end of said bar and said base of said elongate setting slot near said tool face of said whipstock.

104. The rectilinear setting tool of Claim 102 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said elongate setting slot an acute angle of up to 3 degrees exists between a plane including said base of said elongate setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said elongate setting slot a gap exists between said bottom end of said bar and said base of said elongate setting slot near said tool face of said whipstock.

105. The rectilinear setting tool of Claim 103 wherein said acute angle is not greater than 0.3 degrees.

106. The rectilinear setting tool of Claim 104 wherein said acute angle is not greater than 0.3 degrees.

107. A rectilinear setting tool for use with a slotted face wellbore deviation assembly which includes a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis; and having an elongate setting slot having a rear wall, a front side, an apex and a base, extending into the whipstock from said tool face thereof and extending from near said top of the whipstock toward said bottom thereof such that the front side of the elongate setting slot is an opening within the tool face of the whipstock;
comprising:
a bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received within the elongate setting slot;
a top sub attached to said top side of said bar; and, a tubular member having a top end and a bottom end, attached to the front side of said bar and extending from said top sub to near said bottom end of said bar, said tubular member being in communication with said top sub and adapted to receive a hydraulic fitting at said bottom end thereof.

108. The rectilinear setting tool of Claim 107 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said elongate setting slot an acute angle of up to 3 degrees exists between a plane including said base of said elongate setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said elongate setting slot a gap exists between said bottom end of said bar and said base of said elongate setting slot near said tool face of said whipstock.

109. The rectilinear setting tool of Claim 107, in which the elongate setting slot further includes a shear pin aperture centered within the rear wall and near the base thereof, further comprising: a shear pin threaded aperture centered between said side walls of said bar extending into said back side thereof in coaxial alignment with said shear pin aperture and said shear pin threaded aperture with said bar received in the elongate setting slot.

110. The rectilinear setting tool of Claim 108 wherein said acute angle is not greater than 0.3 degrees.

111. A rectilinear setting tool for use with a slotted face wellbore deviation assembly which includes a whipstock, adapted for securing to an anchor packer, having a back side, a tool face, a top, a bottom, and a longitudinal central axis; and having an elongate setting slot having a rear wall, a front side, an apex and a base, extending into the whipstock from said tool face thereof and extending from near said top of the whipstock toward said bottom thereof such that the front side of the elongate setting slot is an opening within the tool face of the whipstock;
comprising:
a bar having a top end, a bottom end, a back side, a front side and side walls, with said bar configured and dimensioned to be slidingly received within the elongate setting slot;
a top sub attached to said top side of said bar and adapted to receive a hydraulic fitting in communication therewith.

112. The rectilinear setting tool of Claim 111 wherein said bottom end of said bar is configured and dimensioned such that when said bar is slidingly received in said elongate setting slot an acute angle of up to 3 degrees exists between a plane including said base of said elongate setting slot beginning near said longitudinal central axis and a plane including said bottom end of said bar beginning near said longitudinal central axis such that when said bar is in place within said elongate setting slot a gap exists between said bottom end of said bar and said base of said elongate setting slot near said tool face of said whipstock.

113 . The rectilinear setting tool of Claim 111, in which the elongate setting slot further includes a shear pin aperture centered within the rear wall and near the base thereof, further comprising: a shear pin threaded aperture centered between said side walls of said bar extending into said back side thereof in coaxial alignment with said shear pin aperture and said shear pin threaded aperture with said bar received in the elongate setting slot.

114. The rectilinear setting tool of Claim 112 wherein said acute angle is not greater than 0.3 degrees.

115. The rectilinear setting tool of Claim 111 further comprising a hydraulic hose extending from said top sub past and in communication therewith to beyond said bottom end of said bar such that said hydraulic hose may act as an extension conduit for fluids.

116. The rectilinear setting tool of Claim 115 wherein said hydraulic hose is affixed to said back side of said bar.

117. A method for setting a whip-anchor assembly having a tool face incorporating an elongated setting slot, with a drill string in a wellbore for changing the direction of drilling wherein the whip-anchor assembly is releasably secured within the elongated setting slot to a rectilinear setting tool supported on the drill string comprising the steps of:
(a) lowering the whip-anchor assembly into the wellbore;
(b) orientating the whip-anchor assembly;
(c) anchoring said whip-anchor assembly in the orientated position in the wellbore;
and (d) releasing the rectilinear setting tool from the whip-anchor.

118. A method for setting a slotted face wellbore deviation assembly with a drill string in a wellbore for changing the direction of drilling wherein the wellbore deviation assembly incorporates a whipstock fitted with an elongated setting slot longitudinally set in the tool face thereof, attached to an anchor-packer, and further is releasably secured to a rectilinear setting tool within the elongated setting slot supported on the drill string comprising the steps of:
(a) lowering the slotted face wellbore deviation assembly into the wellbore;

(b) orientating the slotted face wellbore deviation assembly;
(c) setting the anchor-packer; and, (d) releasing the rectilinear setting tool from the whipstock.

119. A method for setting a slotted face wellbore deviation assembly with a drill string in a wellbore for changing the direction of drilling wherein the slotted face wellbore deviation assembly incorporates a whipstock fitted with an elongated setting slot, an upper hydraulic passageway and internal plumbing, attached to a hydraulic anchor-packer, and further is releasably secured within the elongated setting slot to a rectilinear setting tool supported on the drill string comprising the steps of:
(a) attaching a shearable hydraulic fitting to the upper hydraulic passageway;
(b) attaching a hydraulic line between said shearable hydraulic fitting and the rectilinear setting tool;
(c) lowering the slotted face wellbore deviation assembly into the wellbore;
(d) orientating the slotted face wellbore deviation assembly;
(e) setting the hydraulic anchor-packer; and, (f) releasing the rectilinear setting tool from the whipstock.

120. The method for setting a slotted face wellbore deviation assembly of Claim 119 comprising the additional step of:
(b-1) attaching a hydraulic isolator between the rectilinear setting tool and the drill string, following step (b).

121. The method for setting a slotted face wellbore deviation assembly of Claim 119 comprising the additional step of:
(b-1) attaching an improved piston sub between the rectilinear setting tool and the drill string, following step (b).

122. A method for setting a slotted face wellbore deviation assembly with a drill string in a wellbore for changing the direction of drilling wherein the slotted face wellbore deviation assembly incorporates a whipstock fitted with an elongated setting slot longitudinally set in the tool face thereof, attached to a mechanical anchor-packer, and further is releasably secured to a rectilinear setting tool within the elongated setting slot supported on the drill string comprising the steps of:
(a) lowering the slotted face wellbore deviation assembly into the wellbore;
(b) orientating the wellbore deviation assembly;
(c) setting the mechanical anchor-packer by placing the required setting weight on the drill stem; and, (d) pulling up on the drill stem to release the rectilinear setting tool.

123. A method for setting a slotted face wellbore deviation assembly with a drill string in a wellbore for changing the direction of drilling while bottom washing the wellbore, wherein the slotted face wellbore deviation assembly incorporates a whipstock fitted with an elongated setting slot, an upper hydraulic passageway and internal plumbing, attached to a mechanical anchor-packer, and further is releasably secured to a rectilinear setting tool supported on the drill string within the elongated setting slot, comprising the steps of:
(a) attaching a shearable hydraulic fitting to the upper hydraulic passageway;
(b) attaching a hydraulic line between said shearable hydraulic fitting and the rectilinear setting tool;
(c) lowering the slotted face wellbore deviation assembly into the wellbore while maintaining circulation;
(d) orientating the slotted face wellbore deviation assembly;
(e) setting the mechanical anchor-packer by placing the required setting weight on the drill stem; and, (f) pulling up on the drill stem to release the rectilinear setting tool.

124. A method for setting an improved whipstock incorporating a slotted face with a drill string in a wellbore for changing the direction of drilling wherein the whipstock is fitted with an elongated setting slot longitudinally set in the tool face thereof, attached to an anchor-packer, and further is releasably secured to a rectilinear setting tool within the elongated setting slot supported on the drill string comprising the steps of:
(a) lowering the improved whipstock into the wellbore;
(b) orientating the improved whipstock;
(c) setting the anchor-packer; and, (d) releasing the rectilinear setting tool from the whipstock.

125. A method for setting an improved whipstock incorporating a slotted face with a drill string in a wellbore for changing the direction of drilling wherein the whipstock is fitted with an elongated setting slot and internal hydraulic plumbing, attached to a hydraulic anchor-packer, and further is releasably secured to a rectilinear setting tool supported on the drill string within the elongate setting slot comprising the steps of:
(a) attaching a shearable hydraulic fitting the internal hydraulic plumbing of the improved whipstock;
(b) attaching a hydraulic line between said shearable hydraulic fitting and the rectilinear setting tool;
(c) lowering the improved whipstock assembly into the wellbore;
(d) orientating the improved whipstock assembly;
(e) setting the hydraulic anchor-packer; and, (f) releasing the rectilinear setting tool from the whipstock.

126. The method for setting an improved whipstock assembly, incorporating a slotted face, of Claim 125 comprising the additional step of:
(b-1) attaching a hydraulic isolator between the rectilinear setting tool and the drill string, following step (b).

127. The method for setting an improved whipstock assembly, incorporating a slotted face, of Claim 125 comprising the additional step of:
(b-1) attaching an improved piston sub between the rectilinear setting tool and the drill string, following step (b).

128. A method for setting an improved whipstock incorporating a slotted face with a drill string in a wellbore for changing the direction of drilling wherein the whipstock is fitted with an elongated setting slot longitudinally set in the tool face thereof, attached to a mechanical anchor-packer, and further is releasably secured to a rectilinear setting tool within the elongated setting slot supported on the drill string comprising the steps of:
(a) lowering the improved whipstock assembly into the wellbore;
(b) orientating the improved whipstock assembly;
(c) setting the mechanical anchor-packer by placing the required setting weight on the drill stem; and, (d) pulling up on the drill stem to release the rectilinear setting tool.

129. A method for setting an improved whipstock incorporating a slotted face with a drill string in a wellbore for changing the direction of drilling while bottom washing the hole, wherein the whipstock is fitted with an elongated setting slot and internal hydraulic plumbing, attached to a mechanical anchor-packer, and further is releasably secured to a rectilinear setting tool supported on the drill string within the elongate setting slot, comprising the steps of:
(a) attaching a shearable hydraulic fitting the internal hydraulic plumbing of the improved whipstock;
(b) attaching a hydraulic line between said shearable hydraulic fitting and the rectilinear setting tool;
(c) lowering the improved whipstock assembly into the wellbore while maintaining circulation;
(d) orientating the improved whipstock assembly;
(e) setting the mechanical anchor-packer by placing the required setting weight on the drill stem; and, (f) pulling up on the drill stem to release the rectilinear setting tool.

130. A method for drilling a deviated hole utilizing a drill string in a wellbore incorporating a slotted face wellbore deviation assembly without a shear block assembly and wherein the slotted face comprises an elongated setting slot longitudinally set in the tool face thereof comprising:
(a) setting the slotted face wellbore deviation assembly;
(b) tripping out of the wellbore;
(c) attaching a window mill bit and a water melon bit to the drill string;
(d) tripping into the wellbore;
(e) milling a window in the side of the wellbore; and, (f) tripping out of the wellbore.

131. The method of Claim 130 wherein step (c) includes a plurality of water melon bits.