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Publication numberUS1610414 A
Publication typeGrant
Publication dateDec 14, 1926
Filing dateJun 24, 1926
Priority dateJun 24, 1926
Publication numberUS 1610414 A, US 1610414A, US-A-1610414, US1610414 A, US1610414A
InventorsEdwin L Bernard, Hector F Reynaud
Original AssigneeEdwin L Bernard, Hector F Reynaud
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety coupled drilling joint
US 1610414 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 14,1926. f v A 1,610,414

- l E. 1 QERNARQET A1.

SAFETY coUPLED nRLLiNG JOINT Y Filed June 24, 192e ern ara?,

Patented Dec. 1,4, 192s;



Application filed June 24, 1926. Serial No. 118,326.

This invention relates to drilling joints and more particularly to a connecting joint for use 1n connecting'the drilling tools of well drilling apparatus. A

An important object of the invention is to'provide a device of this characterwhich may be employed to prevent excessive strains upon the drilling tool which would tend tobreak the same and which,when excessive strains are. applied to' the drilling tool, serves to .disconnect the drilling apparatus and to provide between the drilling apparaments.

- pin 12 w '-drawings,

tus and -tool a swivel joint, retaining the connection between the tool and drilling ap-. paratus for longitudinal movementsl but dis' connectingthe same during rotative move- A further and more specific object-of the invention is to provide a swivel: joint for connecting the sections of drill pipe, particularly that sectionto which the drillv is to be connected -to the pipe, the sections of the swivel joint being rigidied to one another by frangible elements, breaking or shearing under strain slightly jless than that vsulicient to cause breakage ofthe drill or drill joint.l

These and other objects we attain bythe drawings, wherein for the purpose of illustration is showna preferred embodiment of our invention and wherein z-f joint constructed in accordance with our invention; j

Figure 21s a fragmentary side elevation,

the upper section of the joint removed withv the pins 1n position therein;

Figure 1.`

Referring now more particularly to the drical body havingformed in' its lower end a threaded box 11 for the reception ofthe upper end upper end character. formed with spaced from fof-a drill 'joint of any suitable The upper end of the body 'is a bore 13 which, at a point the upper end of the box, communicates with a. 'reducedvbore 14 extending tothe upper end ofthe box. The connection between the bores 13 and 14 produces an upwardly facing 'shoulder 15 which is formed with sockets 16, tice purpose of which `will presently. appea The u per and of the bore 13 is enlarged, as at 1 to y Figure lis a vertical-section throughv a tool F gure 3 isa section oil-the line 3-3 of against to the numeral 10l indicates acylin-l ch may be either the pin upon the of the drilling tool or upon the provide a second upwardly facing shoulder 18 and between the spaced vertically from the shoulder 14, the llv ;val ofthe bore is threaded, vas at 19. The

0 y the coupling.` j

The second member of the coupling consists of a tubular body 20 of less diameter vthan the bore 13 and having at its lower end alian'ge 21 increasing its diameter, so that it is equal to the bore 13. The lower end of the body at the thickened or flanged portion thereof is `formed with sockets 22 corresponding in number and arrangement to p [lile sockets 16 formed in the shoulder `14. lation of the coupling sections for the reception of pins' 23 which normally preventv rotation of the sections. The combined shoulder 18 and a point ese sockets combine in the assembled re shearing kstrength of the pins 23 is slightly l less than the torque factor of the/tool or tool pin, so that these pins will shear before the tool will break, in event of the tool jamming in the well.

The pins 23 are pref-- verably bi-co'nic and the sockets 16 and 22 drical body of the section 20. The upper end of this nut hasa head 29,-the lower face of which seats upon the shoulder 18 when the nut is in applied position and jams therepins 23, and to prevent escape of the section 20 therefromfwhen the pins have beenv sheared. The bore 14y of the member 10 and the bore of the member 2O vide 'a water course for connecting the drill pipe with -the'water course 31 of the tool.

lock the nut in position within the -coupling section 10. The head isv preferably of suliicientdepth to project vabove the upper surface of the section 10 and in this 10o 20, which would disengage the -ok-I '1 5 serve to pro- It will be quite obvious that if, during'l drilling operations, the toolv becomes sud- 00 10, as described, forms one member of Y denly jammed, with the result that the` rotary drilling table (not herein shown) throws a sudden strain upon the drill pipe and tool, before either of these elements will break under the strain thus applied, the pins 23 will shear, permittin the drill pipe to rotate independently of t e tool. the sudden strain will cause a slowing down ofthe rotary table and the breakage of the pins will again permit the rotary tableto speed up and, in fact, to attain a greater speed than it would ordinarily have, operator will be immediately apprised of the fact that the breakage has occurred.. The tool may then be withdrawn by withdrawing the pipe, the swivel connections serving as a means for hoisting the tool -rom vthe hole.

Since the construction hereinbefore set forth is obviously capable of a certain range of change and modification without materially departing from the spirit of the invention, we do not limit ourselves specific structure except as hereinafter claimed.

vg5 We claim A In combination 'with a rotary drilling.

Since to such,

pi e and tool to be driven thereb a c011-` pling connecting the drill pipe Van tool including two rotatably engaged sections, one of said sections havin `a bore reduced to produce a shoulder adJacent its lower end and enlarged to provide a shoulderidjacentl its upper end, lthe other of the sections being .in corresponding sockets of the shoulder and the enlarged lower end of the second section and having a combined shearing strength less than the torque rotary drilling pipe or tool.

Intestimony whereof we hereunto aiix our signatures. l .v



factor of either the

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2476621 *Nov 6, 1942Jul 19, 1949Westinghouse Electric CorpCavity joint
US2746414 *Mar 26, 1954May 22, 1956Roberts RobertRetrievable anchor
US2889162 *Feb 3, 1958Jun 2, 1959Norris Charles RSwab line connection with frangible element
US3146980 *Sep 14, 1962Sep 1, 1964North American Aviation IncShock preventive mounting structure
US3198555 *Mar 8, 1961Aug 3, 1965Johnson Woodruff CompanyPipe coupling with lug engaging rotatable collar
US4655479 *Oct 15, 1985Apr 7, 1987Hughes Tool Company - UsaPre-set torque limiter sub
US4771593 *May 21, 1987Sep 20, 1988Lee Harold DConvertible blade hub
US4894043 *Feb 9, 1988Jan 16, 1990Nixon Jr Robert ETorque transmitting coupler with shear capability and component separation containment
US5273121 *Apr 3, 1992Dec 28, 1993Eastern Oil Tools Pte Ltd.Intercarrier mechanism for connecting and orienting tubing conveyed perforating guns
US5599129 *Jan 17, 1995Feb 4, 1997Dcd Design & Manufacturing Ltd.Load limited connector
US6497295Jan 31, 2000Dec 24, 2002Specialised Petroleum Services LimitedTorque limiting tool
US6530429 *Jan 24, 2001Mar 11, 2003Sps-Afos Group LimitedDownhole cleaning tool with shear clutch
US7178838 *May 29, 2003Feb 20, 2007Philmac Pty LtdNut and tail assembly
US7846365Jun 10, 2009Dec 7, 2010Philmac Pty LtdMethod of manufacture of a nut and tail assembly
US9347279Feb 25, 2013May 24, 2016Smart Stabilizer Systems LimitedTorque control device for a downhole drilling assembly
US20010022223 *Jan 24, 2001Sep 20, 2001Howlett Paul DavidDownhole cleaning tool with shear clutch
US20040251687 *May 29, 2003Dec 16, 2004David ChelchowskiNut and tail assembly and method for the production thereof said tail including a rigid outer sleeve
US20090250837 *Jun 10, 2009Oct 8, 2009Philmac Pty LtdMethod of manufacture of a nut and tail assembly
WO2010031541A1 *Sep 16, 2009Mar 25, 2010Ejot Gmbh & Co. KgTorque transmission element
U.S. Classification285/330, 464/20, 285/39, 403/DIG.300, 285/384, 464/33, 403/2, 403/184
International ClassificationF16D9/06, E21B17/06
Cooperative ClassificationE21B17/06, Y10S403/03, F16D9/06
European ClassificationE21B17/06, F16D9/06