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Publication numberUS2971178 A
Publication typeGrant
Publication dateFeb 7, 1961
Filing dateFeb 13, 1956
Priority dateFeb 13, 1956
Publication numberUS 2971178 A, US 2971178A, US-A-2971178, US2971178 A, US2971178A
InventorsReesby Carl E
Original AssigneeWelex Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flexible connector for conductor core cable
US 2971178 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


R Mm x [CL- 4 a 0 pm m ffl: Mm m A 7 6 ,m I z m M 4'4 u w M 6 O 4 3 a .1. A///// \fixaww w -wwq n m z m w a u a a F ATTORNEY.

Carl E. Reesby, Bellaire,

FLEXIBLE CONNECTOR FOR CONDUCTOR CORE CABLE Tex., assignor, by mesne assignments, to Welex, Inc., a corporation of Delaware Filed Feb. 13, 1956, Ser. No. 565,203

1 Claim. c1. 339-7 ging cables.

After a well has been drilled, various surveys may be made prior to and during its completion. Logs of such surveys include those for well bore diameter, well bore temperature and various formation characteristics. The logging units which perform these surveys usually have the conductor cable, cable winch, and recording equipment integrally constructed and the various surveys are logged by attaching an appropriate sensing tool to the cable for each. Thus, several types of logs may be made from the same logging unit by traversing the well bore with a prescribed sensing element. Various perforating and coring tools may also be lowered and actuated from the same cable.

It is therefore the general object of this invention to provide a flexible cable connector suitable for conductor core cable which may be readily connected and disconnected, and provide a firm and reliable connection for said cable.

The cable connector provided by this invention has two members each of which have means to be connected to cable. The members are adapted to be selectively interconnected by a ball and socket means. Spline means between said ball and said socket provide ready connection and disconnection in a first relative angular position of said ball to said socket and further provide longitudinal'retention of said ball in said socket when said ball is in a second angular position within said socket. Restraining means between said ball and said socket provide angular retention of said ball and said socket to said second relative radial position. Passage for electrical conductors and connectors may be provided through said members. The arrangement is such that said ball may be inserted into said socket in a first relative angular position and rotated to and restrained in a second relative angular position.

With the above and other objects in view as may appear hereinafter, reference is made to the accompanying drawing in which:

Figure 1 is a sectional elevation of a well bore showing the connector as will be normally used with well logging equipment.

Figure 2 is a longitudinal cross section showing the connector as assembled for use.

Figure 3 is a longitudinal cross section taken at 33 of Figure 2.

Figure 4 is a transverse sectional view taken at 4-4 of Figure 3.

As illustrated in Figure l, a connector 10, as provided by this invention, connects a conductor core logging cable 12. Suspended by cable 12 in a well bore 14 is a sensing tool 16. Supporting cable 12 is a sheave 18.

Referring to Figure 2, the connector is comprised of an upper member 20 and a lower member 22. Said members 20 and 22 are adapted to be detachably con- United States Patent '0 24. The socket 24 has been provided with a segment of its axial diameter increased from the center of the socket to the entry of the socket in such manner that the socket surface becomes the minor diameter of an internal spline 29. Thus, when in a substantially longitudinal and aligned position relative to socket 24, the ball 26 may readily be inserted in said socket. Rotation of ball 26 substantially within socket 24 will engage the spherical land surfaces and provide longitudinal retention of said ball within said socket.

As illustrated in Figures 2 and 4, a screw 28, located in ball 26 and extending into a slot 30 provided in upper-member 20, serves as means of preventing relative rotation of said upper member with lower member 22. It may be readily seen that this arrangement in no manner restrains angular articulation of said member 20 relative to member 22 and that the normal full axial deflection provided by a ball and socket joint is retained. It is pointed out that the angular retention screw 28 may be replaced by other means. An example foreseen is a spring loaded retaining button extending outwardly from ball 26 into slot 30.

Each of said members 20 and 22 is adapted to receive and be attached to a section ofcable 12 by means of an anchor lug 32. Although this means is herein shown as a mechanical device it is pointed out that other types of lugs, such as poured zinc, would prove satisfactory.

Each of said members 20 and 22' is also provided with a tapered spring 34 which is attached to said member and encompasses a section of cable 12. As is well known the purpose of such springs are to prevent chafing and to relieve stress concentrations. As herein illustrated the spring EMv also serves to guidethe connector 10 through the groove of sheave 18 and also to prevent hanging of said connector on borehole projections.

A common passage 36 is provided through members 20 and 22 and houses therein the conductors contained in cable 12 and also an electrical plug 38 which connects said conductors. As illustrated, a grounding cable 40, which serves to augment the electrical contact of the connected members 20 and 22, is also connected by plug 38. It is readily discerned, however, that two conductors will require a somewhat larger plug 38 than would one. Thus, when very small structures are provided, this grounding conductor may be dispensed with and the contact of members 20 and 22 relied on for electrical continuity.

It is pointed out that, as a structural variation, one of members 20 and 22, member 22 for example, may be adapted to be threadedly or otherwise connected directly to the sensing tool rather than to the cable. While this would no longer provide the advantage of allowing the connector to pass over sheave 18, some definite advantages would still be retained. As an example, the fiexure of the connector would reduce the cable stress at said connector when lifting a sensing tool from a horizontal position by means of the cable.

It is also pointed out that the connector could serve as a safety release by predetermining the stress area of the reduced diameter found at the juncture 42 of ball 26 with lower member 22. If the tool becomes sanded in or otherwise caught in the well bore, a definite point of separation could then be established without incurring the risk of parting the cable at some unforeseen point.

In operation, the members 20 and 22 are attached to respective sections of cable 12 as heretofore described. The splines provided in ball 26 and socket are placed in registry. The ball is then inserted in .socket 24 and rotated until the spherical landportions of the ball and socket are in registry. As provided, the screw 28 is then inserted through 'slot3'0 and into 'ball 26. The conmotor is now free to articulate'through 360 and to a deflection determined 'by thesocket opening and the diameter of'juncture 42 between'ball '26'and lower-member 22. Models of the invention 'as *herein illustrated and described have been "constructed to such proportions that 'the connector "willfreely'pass over'a sheave having a root 'di'ameterof about 34 inches.

It is pointedoutthat thougha preferred embodiment of this invention hasbeen'illustrated and described herein, various'ehan'gesmay bemade by those'skilled in this linking one end of a first elongated hollow member to one end of a second elongated hollow member; anchoring means to connect another "end of said second member to said cable; means to connect the otherend of "said first member to'a well tool, said socket having a ballentrance opening facing axially of said membersyspline "means in said socket adjacentsaid-opening, a portion of 4 said ball being cut away and cooperating with said spline means topermit insertion of said ball in said socket-and removal of said ball from said socket when said first member is in a first angular position about the longitudinal axes of said members relative to said second member and to efiect longitudinal retention of said ball in said socket when said first member: isrotated to a second angular position about the longitudinal axes of said members relative to=said-second member;retaining-mea-ns-to retain said first member in said second -*angular position relative to said secondamembento thereby retainsaidsball in said socket; and elctrical-connectionmeans within ,said first and second members to electrically connect said cable conductor.

References Cited in the file of this patent UNITED STATES PATENTS 384,504 Braman a. June.12,;1888 1,065,483 Turner. June24, 1913 1,110,475 Baier Sept. 15, 1914 2,147,491 Le Bus Feb. .14, 1939- 2,278,720 Follet Apr. '1, 1942 2,673,965 Cass Mar. 30, 1954 2,750,569 Moon June 12, 1956 .FOREIGN PATENTS 107,434 France Arm-14,1931

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US384504 *Jun 12, 1888 Pitman-box for harvesters
US1065483 *Mar 11, 1912Jun 24, 1913Harry C TurnerBall-and-socket joint.
US1110475 *Jul 27, 1914Sep 15, 1914Swiss Magneto CompanyElectric-conductor coupling.
US2147491 *Dec 4, 1936Feb 14, 1939Bus George F LeSide tracker for oil well equipment
US2278720 *Apr 29, 1940Apr 7, 1942Standard ScrewFixture joint
US2673965 *Jun 26, 1950Mar 30, 1954Cass William CBall and socket trailer hitch with means to conduct current therethrough
US2750569 *Jan 8, 1952Jun 12, 1956Signal Oil & Gas CoIrreversible tool joint and electrical coupling for use in wells
FR707434A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3076163 *Aug 13, 1959Jan 29, 1963Gen Motors CorpHinge pin with electrical connector
US3350678 *Oct 24, 1965Oct 31, 1967Vector Cable CompanySeismic cable system
US3367000 *Oct 23, 1965Feb 6, 1968Boeing CoDetachable fastening device
US4469392 *Mar 19, 1982Sep 4, 1984Mobil Oil CorporationOcean bottom seismic cable connector
US4525013 *Jan 17, 1984Jun 25, 1985The United States Of America As Represented By The Secretary Of The NavyDemountable coaxial electrical connector for in-line amplifiers
US4624308 *Apr 15, 1985Nov 25, 1986Halliburton CompanySour gas cable head
US4648444 *Apr 17, 1985Mar 10, 1987Halliburton CompanyTensile ring cable head assembly
US6196325Dec 4, 1998Mar 6, 2001Halliburton Energy Services, Inc.Heavy-duty logging and perforating cablehead for coiled tubing and method for releasing wireline tool
US6634794 *Jun 5, 2002Oct 21, 2003Lucent Technologies Inc.Optical fiber connector assembly
US6893267 *Nov 25, 2003May 17, 2005Wen Hsiang YuehUSB plug with a multi-directional rotation structure
US7341457 *Dec 22, 2006Mar 11, 2008Carrier Kheops BacElectrical or optical connector capable of being immersed in a fluid environment
US20050112908 *Nov 25, 2003May 26, 2005Yueh Wen H.Usb plug with a multi-directional rotation structure
EP0219793A2 *Oct 13, 1986Apr 29, 1987Mitsubishi Jukogyo Kabushiki KaishaCable insertion nozzle
EP0376401A1 *Dec 21, 1989Jul 4, 1990iGUZZINI ILLUMINAZIONE S.r.l.Revolving, low-voltage contact device suitable for being orientated according to a plurality of space directions, in particular for lighting equipment
U.S. Classification439/8, 439/359, 439/449, 403/6, 174/86, 403/362
International ClassificationH01R35/00, H01R13/58, H01R35/02
Cooperative ClassificationH01R35/02, H01R13/58
European ClassificationH01R35/02, H01R13/58