US 3171490 A
Description (OCR text may contain errors)
MarchZ, 1965 w. H. STATES LINEN HANGER AND SETTING Toor. THEREFOR Original Filed Jan. 3, 1961 5 Sheets-Sheet 1 EG; ,lao
March 2, 1965 w. H. STATES LINER HANGER AND SETTING TooE THEREEOR 5 Sheets-Sheet 2 Original Filed Jan. 5, 1961 INVENTOR.
March Z, 1965 W. H. STATES LINER HANGER AND SETTING TOOL THEREF'OR Original Filed Jan. 5, 1961 QQWQW 5 Sheets-Sheet 5 Ifo-r.
42 Z 40-` l 39 i9 al 45 45 I 41 45 .59 43 40 INVENTOR.
QL/,QM E 57,9755
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March 2, 1965 w. H. sTATEs 3,171,490
LINERHANGER AND SETTING Toor. THEREFOR rroeA/E y.
March 2, 1965 w. H. s'rA'rEs 3,171,490 LINEE HANGER AND SETTING 'rooL THEREEOR original Filed Jan. 3. 1961y 5 sheets-sheet 5 III United States Patent O 3,171,490 LINER HANGER AND SETTING TGOL THEREFOR William H. States, Garden Grove, Calif., assigner to Midway Fishing Tool Co., a corporation of California Original application Jan. 3, 1961, Ser. No. 80,495. Di-
vided and this application Oct. 12, 1962, Ser. No.
7 Claims. (Cl. 166-124) This invention relates to the petroleum production industry and particularly to the hanging of a liner within a well casing.
A primary object of the invention is to provide a simple, inexpensive and reliable liner hanger and associated setting tool wherein said tool is retrievable after said hanger is set within the casing.
Another object is to provide a liner hanger which is suspended on a setting tool from a running-in string, which is designed to be set in the casing by a simple double reversal of the direction of longitudinal movement of the hanger in the casing but which cannot be so set until after a preliminary conditioning of the hanger mechanism which can only be accomplished by a multiple rotation of the setting tool in a given direction, preferably the direction in which the joints of the running-in string are made up. This arrangement allows complete freedom in vertical movement of the hanger during the runningin of the hanger and the liner suspended thereon, by the driller knowing that the hanger cannot be set until after the conditioning step has occurred and by knowing also that by its very nature, this step may only be performed deliberately.
Still another object is to provide such a liner hanger in which not only the conditioning step in the operation of the hanger is accomplished by rotation of the setting tool, but also the step of separating the tool from the hanger following the setting of the latter in the casing.
A further object is to provide such a hanger incorporating a tubular expansive rubber packer and in which expansion of the packer is accomplished by rotation of the tool in sequence with the other aforesaid tasks assigned thereto.
A yet further object of the invention is to provide such a liner hanger and tool for setting the same in which the conditioning step may not be performed excepting with the liner setting on the bottom of the well. This contributes to the drillers assurance that the setting of the hanger will not occur during the lowering of the liner into the well.
This application is a division carved out of copending application Serial No. 80,495, led January 3, 1961, and covers subject matter disclosed in an antecedent application Serial No. 785,271, filed January 6, 1959, both of the aforesaid applications now being abandoned.
The manner of accomplishing the foregoing objects as well as further objects and advantages will be made manifest in the following description taken in connection with the accompanying drawings, in which FIGS. 1 and 1a show a preferred embodiment in a liner hanger and setting tool of the present invention while the same is being run into a well casing, the packer of the liner hanger being depicted in FIG. 1, while the balance of the hanger disposed therebelow is shown in FIG. la.
FIGS. 2 and 2a are views generally corresponding to FIGS. 1 and la but illustrate the liner hanger with a liner suspended thereon as being bottomed in the well with the setting tool in position to condition the slip means thereof for anchoring engagement with the well casing.
FIG. 3 is a fragmentary view in longitudinal section, depicting the slips in a position assumed thereby when they ice have been conditioned for engagement with the expander for expanding said slips into engagement with the casing.
FIG. 4 is a downward extension of FIG. 3.
FIG. 5 is a transverse sectional view through the upper end of the packer of the liner hanger and through the removable hanger plug and is taken on the line 5-5 of FIG. 2, and on a somewhat enlarged scale.
FIG. 6 is a transverse enlarged sectional View taken on the line 6-5 of FIG. 2 and illustrates the setting tool drive lugs in engagement with drive grooves for manipulating the expander of the invention.
FIG. 7 is a fragmentary enlarged view in transverse section taken on the line 7-7 of FIG. 3.
FIGS. 8 and 8a are composite views illustrating the liner hanger of the invention anchored to the well casing by the slips being expanded against the latter, the setting tool being in position for adding the weight of the running-in string to that of the hanger, thus firming such anchoring.
FIG. 9 is a longitudinal sectional View of the packer of the invention and illustrates the same in packed-Gif condition and with the setting tool engaged with the packer sleeve drive grooves for effecting such action.
FIG. 10 is an enlarged transverse sectional view taken on the line lil-10 of FIG. 2a through the slip mechanism.
FIG. l1 is an enlarged transverse sectional view taken on the line 11-11 of FIG. 9 and more particularly illustrating the setting tool engaged in the packer sleeve drive grooves.
Referring specifically to the drawings and particularly to FIGS. 1 and la, a liner hanger H is there shown as being lowered into a well casing C. The hanger H includes a tubular body generally designated by the numeral 1, which is externally threaded at its upper end and screws into an outer upper tubular member 2 which is internally relieved for a substantial distance upwardly from its lower end and has threads 5 thereabove, into which hanger body 1 screws. An inner tubular member 3 is tightly connected to the upper end portion of member 2 by tapered threads 4. The member 2 has a tapered external slip expanding surface 6 adjacent its lower end. The members 2 and 3, functioning as a unit, are hereinafter designated generally as expander E.
The hanger body 1 has suitable annular external grooves for receiving O rings 7 which engage the internally relieved surface 7a on member 2 to form a hydraulic seal between the hanger body and member 2, during relative longitudinal movement between the hanger body and said n'mber, the purpose of which will be made clear hereina er.
A circumferentially spaced series of bowed drag springs 8 are supported at their lower ends on a collar 9 and at their .upper ends on a slip mounting ring 10, said collar and ring making a close sliding t on hanger body 1 and combining with said springs to form a drag device D. Formed integral with the ring 10 and extending upwardly therefrom are parallel leaf springs 10a on the upper ends of which are mounted a series of segmental wickered slips 11.
The collar 9 has a pair of diametrically opposed longitudinal slots 12 and hanger body 1 has two suitably tapped holes for receiving screws 12a so that screw heads 13 thereof will slidably t in corresponding positions in said two slots 12 to tix upper and lower limits within which drag device D and the slips 11 carried thereby are free to have longitudinal movement relative to said hanger body.
As shown in FIGS. la, 2a, 3 and 10, the hanger body 1 has a pair of diametrically opposed recesses 14 into which a correspondingly positioned pair of slips 11 are biased by their supporting springs 10a. This places the upper tips of these two slips in endwise abutment with the lower end 14 of expander E, for a purpose to bevmadefclear hereinafter.
The tubular member 3 has a'packer P mounted thereon, this including a sleeve 15 which isscrewed externallyV onto member 3 in opposed relation to thev upper end of the tubular memberV 2 (FIG. l). Between the sleeve 15 and thetubular member 2 there isv disposed a suitable packerelement generally designated 16Y which includes a series of axially spaced packer rubbers 17 and inter-' mediate spaces 18 which have a normal or relaxed diameter substantially approximating that of the tubular rnern-` ber 2 and the sleeve 1S, but which, upon axial movement of the sleeve 15 towards the member 2', are adapted to beV squeezed axially and thereby expanded into engagement with the casing C so asto effect a packed-off condition. A well liner L is suspended fromrthe lower end of the hanger body 1 as by a simple threaded connection shown in FIGS. la and 2a.
For suspending -the .hanger H while lowering said hanger and the liner L suspendedther'eon downwardly through the easing C, andffor operating the mechanism of the hanger to set the hanger on said well casing, a setting tool T Yis provided. .This tool includes a mandrel'V y 2t) having a square cross section which connects withthe hanger H through a plug 21 having a'square axial open-' ing 22 through which the mandrel 20 extends and which.
conformsto the crossV section of :said mandrel whereby said plug maybe rotated bythe rotation of said mandrel;
,Y drel 20.
as shown inY FIGS. and la Withlthe upper sub 26 of the setting* tool T tightly screwed onto thel lower end of a running-in string 27. 'The ltubularbody 1V of the hanger I-I' has suspended on the lower end thereof then liner L a which it is the purpose ofthe hanger to support within the casing C at alevelselected by the driller. The weight of the' liner L andthe hanger H are transmitted through the setting `tool 5T "to Vthe vrunningin, string through the lower Ysub V2S mounted on the'l'ower end of'the'manl This'weight; is transmitted downwardly onto the sub 28 by theplug 21 through thetorque head 3&6,v washer 33, thrust b'earing32, and circular plate 31.
Withthe hangerl Hand liner I. thus suspended on the setting tool T, the latteris lowered on the, lowerl end of the running-in string 27 until the lower end of the liner Thevplug 21'- is provided with a depending skirt 23 which"V has coarsegexternal left-hand thread-s 24 which screw into complementari threads provided within an upper por@v `tion ofthe tubular member 3. f At its upper end,r as shown L lcomes to rest in theboam of he wen (FIG. 2a); The relief of the running-in string of the weightV of the'liner and hanger .will vof, course immediately be indicated to the driller causing him to decrease the speed of descent of the f Y, running-instring to whererhe will be able to detect when in'FIG; Y2, the'mandrel 2t)isV threaded as at 25 for the Y reception of a Vtop sub 26 vwhich screwszY onto the lower end of a running-in tubing stringf 27. At its lower ex-v tremity the mandrel 20 isprovidedV with a lower'sub 28 threadedlyl connectedto the mandrel las atr29'and having a lower threaded socket 30 -for'the/reception of a stinger pipe or a washing tool,ras may be desired, for performing Y` certain'il'uid injection operations through the kmandrelY of the setting tool vafter the Vhan-ger has been 'set in the casing C, either beforeor after the annular space between the hanger and thelcasing has/been packedroi by the packer P.
Disposed'about-the- 20 and seatingrup'on the( lower sub 28 is aeircularrplate, 31 on which rests a thrust bearing 32.
andtheV washe`rs33 areV all rotatably mounted'on aV cir"- cular sectionof the` mandrel `20 located between the lower sub 28 and av set-down shoulder 434 provided onl the mandrel 20 which, as hereinafterwill be more parf ticularly described, lserves to` set the yslips 11 rmly after they have been expanded against Vthe casing C. VA bove they set-down shoulder 34, the mandrel 20 is provided with the downward movementof the,y tool T, relative toV the Yhanger H, jfresiult'sin the plate 31 coming to reist on the,
upper ,endy of the hanger body 1\(rFIG. 2)., Engagement ofthe. shoulderf35 Withpthe torque head1-36 carries Ythis head downwardly until the Alugs 39 therein are biased .out-V wardly into the vertical.torquergrooves provided in ther lower endrpgo'rtion of tubularmenibe'r 3 of the expander It 'isltotbe noted' in FIG2ithat ywhile .torque head 36 was shifted'downwardly by the engagementof shoulder 35 on .mandrel 20 therewith, none o'fthe weight of theV y mandrel andfrunning-in string isV transmitted through this l Above the,v bearing n32 is a thrusty Y washer 33., The lower-plate 31, the lthrust bearing32Y shoulder t said torque head because the mandrel shoulder l34 at this time engagesthewasher 33 to impose the weight of the mandrel and running-inrstring 27 through the thrust Y bearing 32 and circular Vplate 31 to the hanger body 1.
yWhatever weight is Vtransmitted by shoulder 34 to ythe Vhan'ge'rrrhody''1fat this time, is' transmitted through Vfthe thrust bearing 32 so .thatl mandrel 20 vmay be readily fro-V ltated, by rotation vof theV running-in string.'` v Asrall of the joints of thelatterare'pr'ovided with, right-handy threads,
' Yall of the threads described Vin the invention excepting Y those speci'tically Vmentioned as being left-hand threads are a further shoulder 35 forming an upper limit stop for an annular carrier head V36 which is -slidably disposed on a,Y circular section of the Ymandrel 20'between the shoulders Y 34 and 3S. VThis head 36 has a ldepending skirt 37 adapted y l to embrace Vthe, bearing 32 and Washer 33, Vas shown inY FIG. l, and engage the bottor'n'plate 31. Inasmuch asit is desired that the head 36 be connected to the mandrel 20 for rotation therewith, the head, 36 is keyed to theY L tWeen'whic-h it has freedom to reciprocate vertically on the mandrel 20 as byav key ss (F1os. 6 artdir). Y Y
Carried by the head 36 is aY pair of torque Alugs 39 each laterally shiftabl'e in a longitudinallyV extended radial slot-40 in the carrier head 36 and Vloadedrradially.out-*1VV wardly by coiled springs 41 partially recessed r'in the torquelugs 39 and bearing against the ybase Vof the Vre- A spectiveV slots 40. Pins V42 `extend. throughradially extended slots 43 in the torque lugs39 so as 'to limit out-` ward movement of the lugs. Y Y
Torque lugs 39 are adapted Vfor tudinally in the Vinner surface of a lower portionofmem- .engagement in a pair n, of diametrically `opposed grooves 45 extending' longiright-hand-threads and rotation ofthe. running-in string Z7 is always inafclockwise direction. l FIG.V ldjllustrates the ,inventionfas it'is being through the vcasingC and shows how Vthe spring arms S of 'the dra'gdevice D Vfrictionally engage the inner surface f '.Of. the wellcasing Cso as toV retard downward movement of the/drag device thus causingsaid device to be a slight drag'inthe downward travel ofthe hanger H thereby posi` tionin'gthedrag device at the upper ofthe two limits behanger'body The Vmeans for setting `these limits of reciprocation ofthe drag devic'ef'on the'hangerbody corn- Vprise the screw'heads 1-3 and the slots12 in which said screw heads slidably'lie,; said heads engagingthe-lower ends ofthese slotswhen the drag deviceis at its upper limitV ofzreciprocation and the upper Vends ofjsaid slots when said drag device Vis'atlthe lower limit of its freedom to reciprocate on hanger body 1v. i
Y' `It. is thus seengthatlwhenthe invention isbeinglow'ered througha casing'rC as shownY in FIGS. 1 and fla, the upper vextremities of the wickered slipsr 11 mounted onthe *drag Y device Dare spaced just downwardly fronrthe lower edge lowered 14 of the expander E. With the expander E thus spaced upwardly from the slips 11 with the latter in their upwardmost positions on the hanger body 1, the setting of said slips against the casing C is a practical impossibility while the device is being lowered through the casing C. The driller in charge of the operation is thus assured that he need not fear the setting of the slips =11 against the casing prematurely because the driller has completely within his control the means for operating the setting tool T to lower the expander yE relative to the hanger body 1 to condition the expander E and the slips 11 whereby a simple reversal of vertical movement of the hanger body in the well casing C will result in expanding the slips 11 against the casing C and thus set the hanger H with the liner L suspended therefrom, in said casing C.
The present embodiment of the invention provides an additional safeguard by preventing the conditioning step from taking place until after the liner L has come to rest on the bottom of the well as shown in FIG. 2n. As already described, this permits the lowering of the mandrel through the plug 21 and the positioning of the head 36 by engagement of the shoulder 35 therewith so that the lugs 39 expand outwardly into the grooves 45 of the tubular member 3 of the expander E with the mandrel 20 supported by thrust bearing 32 so as to facilitate rotation of said mandrel.
The driller, noting when the parts of the invention are positioned as shown in IFIG. 2 in readiness for the conditioning step to take place, rotates the mandrel 2i) through the running-in string 27' in a clockwise direction thereby rotating the expander E and the plug 21 so that threads 5 on tubular member 2 advance the expander downwardly on the hanger body 1 as shown in FIG. 3. This rotation and gradual downward movement of the expander E brings the lower edge of the latter into abutting contact with the upper ends of those slips 11 which are sprung inwardly into external recesses 14 formed in hanger body 1 so that the downward movement of the tubular member Z is transmitted to the drag device lD through said slips thereby shifting said drag device and all the slips 11 embodied therewith a substantial distance downwardly from its upper limit of reciprocable freedom relative to the hanger body 1, as clearly shown in iFlG. 4.
The conditioning step just described shifts the expander E downwardly from the potentially inoperative position relative to the slips which it had when being lowered in the well to the potentially operative position it has relative to the slips as shown in fFIG. 3, yet, without said expander functioning to expand the slips against the well casing C. As above noted, the latter step in the present invention is always reserved for accomplishment by a simple reversal of longitudinal movement of the hanger body 1 in the casing C after the conditioning step has taken place.
The actual setting step, which remains to be done when the parts are related as shown in iFIG. 3, requires the setting tool T to be drawn upwardly to again suspend the hanger H and liner L on said setting tool with the tool related to the hanger as shown in FIG. 1. As the hanger is thus lifted to reverse its downward movement in the well, the drag device D remains in engagement with the well casing until the screw heads 13 engage the upper limits of the slots 12. in the collar `9 whereupon such engagement causes the drag device D to join in the upward travel of the hanger H through the casing C. When the driller has noted the arrival of the hanger H at the level in the well where he desires to set said hanger, he makes another reversal of longitudinal direction of travel of the hanger in the casing C by halting his lifting of the runningin string 27 and starting to lower the latter. When this occurs the drag device D, through its frictional engagement with the casing C remains stationary, while the downward movement of the expander E brings the tapered slip expanding surface 6 into outward wedging relation with all of the slips `11, thereby expanding said slips outwardly to bring their outer wickered faces into biting engagement with the inner surface of the well casing C as illustrated in FIG. 8a.
After engagement of the slips 11 with the casing C has taken effect so that said slips support the weight of the hanger H and the liner L on said casing, the downward movement of the mandrel 2) is continued as shown in FG. 8 until the weight of the mandrel and running-in string is imposed on the upper end of the hanger body 1 so as to ram .the expander E downwardly with considerable force within the slips 11 Ithereby firming the setting of the hanger H in the casing C.
Following the setting of the hanger H in the casing C, as above described, the mandrel 20 is lifted to free lugs 39 from grooves 45, and then rotated in a clockwise direction which rotation is transmitted to the plug Z1 thereby causing the latter to unscrew from the upper end of tubular member 3 as shown in PIG. 9. The mandrel Z9 is then lifted to bring the torque head 36 opposite the upper portion of the packer sleeve 15 causing the torque lugs 39 to be biased outwardly into vertical torque grooves t6 of said sleeve whereby rotation of the mandrel 213 rotates the sleeve 15 and sets the packer P against the casing C by expanding the packing rubbers 17 against said casing as shown in FIG. 9. This being the final step in the operation of the invention, and leaving the mandrel 2l) free, as it does, to be lifted upwardly carrying the torque head 36 and plug 21 thereon, the running-in string 27 is therefore now removed with the setting tool T from the well.
lf desired, the setting tool may be retrieved from the well before the packer P is set, and .the liner may be cemented, washed or the well otherwise treated, following which the setting tool T may be run back into the upper end of the liner hanger, as shown in FG. 9, where the torque lugs 39 will engage in the packer torque grooves 46 inthe sleeve 15. In this connection it should be noted that the sleeve 15 has a tapered upper surface 15' with which the lower extremities of the torque lugs 39 will engage as the setting tool is being reinserted into the hanger H. This tapered surface 15' will effect a camming action on the torque lugs 39 tending to radially depress them in their slots 4t) to the extent necessary to accomplish their reception within the upper end of the sleeve 15. Such engagement will be effected while the setting tool T is being rotated so as to bring the lugs 39 into alignment with the grooves e6 whereupon the lugs will enter these grooves, permitting further downward movement of the setting tool to approximately the position in which this -is shown in FIG. 9. Rotation of the setting tool for a sulicient number of turns to set the packer P in the casing C will follow, after which the setting tool will be retrieved from the well.
As shown in FIG. 2, the mandrel 20 has a central passage 20' of the same diameter as the passage provided in the running-in string 27 so as to readily transmit through the mandrel 2) to any wash pipe or the like suspended from the lower end thereof on the sub 2S any instruments or fluid material required in an operation to be conducted within the liner L.
The foregoing description of a preferred embodiment of the invention is believed to make clear how the invention accomplishes all of the objects set forth in the preamble of this specification. While only a single embodiment of the invention has been disclosed, it is to be understood that this is for illustrative purposes only, and that various changes and modifications amy be made in this without departing from the spirit of the invention or the scope of the appended claims.
What is claimed is:
l. In a hanger and a tool for setting Ithe same in a well casing to suspend a liner from said casing, the combina tion of: a tubular hanger body; adrag device mounted on said body and freely reciprocable longitudinally relative to said body between upper and lower limits on said tard longitudinal movement and rotation of said device y in said casing; means on said bodyvand'psaid drag device dening said limits Aby engaging saiddevice when longitudinal movement lof said body relative to saiddevice has brought said device to either of said limits, said limit detining Vmeansthereupon causing said device to move longitudinally in said casing with said body; key means limiting relative rotat-ion between said body and said device; slip means provided on said device and extending upwardly therefrom; an expander for said Vslip means longitudinally shiftably mounted on said body above said slip means and normally disposed upwardly out of operative relation with said slip means when said drag device is at its upper limit aforesaid on said body; a setting tool 8 tion thereofvinto' which 'matching external threads on an upper portion of saidibody screw, said expander having vertical internal torque grooves formed therein above the upper end fof said tubular body, and coarse' left-hand internal threads'within aniupper-portion thereof; a'plug having complementary external left-hand threads screwed downwardly into said expander, said Yplug having a cenfor suspending said body from the lo-wer end of a run- I to produce relative vertical movement between said body and said device which lowers said drag device relativeto said body a substantial distance below the upper limit ofL free movement of said device relative to said body, whereby said lowering of said expanderrelative to said body does not function to expand said slip means but conditions said expander and slip meansY for expanding the latter against said casing when said body 4is thereafter lowered relativeto said casing.` n Y f 2. A combination as recited in claim 1 wherein said setting tool is rotatable within said body and said expander comprises an internally threaded sleeve and said body has external threads on which the expanderlscrews; and meansV on said tool engageablerwith said' expander to rotate the latter relative to said body to shift saidexpander downwardly on said body as aforesaid.
3. A combination as recited in claim 2 wherein means is provided for transmitting to said drag device said downward movement of said expander on said body, to produce the downward movement aforesaid ofsaid drag device relative to said body. y
4. A-comb-ination as recited in claim 3'whereinrecesses are provided externally in said tubular body so as to be located opposite certain of said slip means when said drag device is at its upper limit of movement on said body,
downwardly through said plug; a head mountedon the f lower end of said mandrelto engage said plug and thus support said body and a liner suspended from the latter, on said mandrel, said head being above the level of said `torque grooves'when thus supporting ksa-idbody; radially. biased lugs on said head adaptedto bev lowered tothe level of said grooves to engage therewith bylowering said Ymandrelafter said liner has been bottomed in vsaid well, thereby relieving said expander of theA weight of said lineriand hanger body,.rotation of said mandrel thereupon rotating said expander to lower the'latter relativeto said body; and means vfor transmitting to said drag device said downward movement of said expander on said body to lower said device relative to said body a substantial distance beneath the upper limit offree movement of said device relative to saidbody,-whereby said lowering'of said expander relative to said body does not function to Vexpand said slip means `but conditions 'said expander and slip means'for producing expansion ofthe latter against saidca'sing vwhen said;|body and liner are y thereafter lowered relative to said casing after being irst lifted from nthe bottom of the well,` said tool beingV rep ing saidfplug from said expander.
said slip means being spring mounted on said drag device d so as to flex inwardly into said recesses and be aligned in endwise abutment with said expander whereby the-ad-v vancing downward of the latter into its potentially operative position relative to said body pushes the slip'means aligned therewith downwardly relative to Vsaid body andy out of said recesses and thuspositions the drag device and slip means in general downward-ly relative to said body for accomplishing expansion of Vthe Slip means against the casing merely by lowering the body relative to said drag device. y n.
5. In `a hanger and a tool forV setting'the same in a well casing to suspend a liner from said casing, the combina,
said device frictionally .engagingisaid casing to retard;
longitudinal movement or rotation of said device in said 6. A combination as .recited Vin Vclaim V5v whereiny the upper portion ofsaid expander isA externally threaded; and an annular lrubber packer provided externally V'on said expande-r, Vsaid packer including an internally threaded Vsleeve which screwsdownwardly on said expander, said sleeve having longitudinal torque grooves within an upper Vportion thereof,.saidfgrooves being engageable by said lugs after the u'nscrewing of said plug fro'msaid expander, whereby said packer-,maybe set Vagainst said casing by rotation of said mandrel.v i
- 7. A combination as recited in claim`5gwherein a lower portion of said'V mandrel :is eylindrical, withv a reduced diameterthus providing a mandrel supporting vshoulder at 4the upperfendzofvsaid-portion; al sub *mounted on the lower end ofgsaid mandrel; a circular plate rotatably mounted on said cylindrical portion of said mandrel below said head; thrust'bearing means mounted on said portion of said mandrel 4between said plate and said head; and a' secondishoulder formed onsaid mandrel above -said first shoulder to propel Vsaidfhead,downwardly to the Y leveljof said expander torque grooves whensaid liner is bottomed' in said well, said rst mentioned Vshoulder'at this time engaging said thrust bearing meansA to seat said plate on the upper end of 'sa-id' hanger body' and rotatably support `said mandrel and running-in'string on Said body Y and said liner, thereby amply 'Y'retarding rotation of said casing; means on said body Vdefining said limits by engaging said device when longitudinal movement of said body relative to said device hasbroughtsaid device to either of said limits, said limitdening means thereupon forcing d said device to move longitudinally in said'casingw'ith said body; key means limiting relative rotationV between said` body and saidrdevice; slip means provided on saiddeyice and extending upwardly therefrom; an expander forn said slip means comprising a tubular upward extension of saidV Y body having internal right-hand threadspin a lower por-Y Y body during the expander rotating step while minimizing the fric-tion of rotating saidlmandrel. Y
L References Cited in the are" of this patent.
' UNITED 'STATES' PATENTs 2,318,167 Knowlton f 1 May 4,1943 2,442,544. Johnson L.a June l,V 1948 Y2,638,987 i Condra f l ;l May 19, 1953 2,693,859 Wright NOV. 9, 1954,
.Reed 1 sept 9, V19,58