US2995791A - Side door swivel rope socket - Google Patents

Description

ug- 15, 1961 B. w. CLEGG 2,995,791

SIDE DooR swIvEL. RoPE socxET Filed Oct. 25; 1969 BERNRD W. CLEGG /NvENToR Fm. 2. BY /LMH A TTORNE Y United States Patent O l 2,995,791 SIDE DOOR SWIVEL ROPE SOCKET Bernard W. Clegg, P.O. Box 449, Breckenridge, Tex. Filed Oct. 23, 1959, Ser. No. 848,242 1 Claim. (Cl. 24-123) This invention relates to cable drilling and has reference to an improved rope Socket for connecting various tools to the drilling cable.

An object of the invention is to provide a swivel rope Socket for a cable drilling rig for quickly and conveniently changing from one tool to another on the lower end of a cable without cutting the cable and rebabbitting the same.

A particular object of the invention is to provide a rope Socket having a removable mandrel permanently secured to the lower end of a drilling cable.

Another Object is to provide a mandrel, as above referred to, capable of being directly attached to certain tools, such as a swab or fishing tool.

Another object of the invention is to provide a slidable door in the body of the socket for removing the mandrel, and which door is capable of staying in place even though subjected to jarring action as occurs during drilling Operations.

A further object is to eliminate all but one drum in the draw works of the drilling rig. Heretofore, separate drums and cables were frequently used for difierent tools operated separately in the bore hole.

These and other objects of the invention will become apparent from the following description and the accompanying drawings, wherein:

FIGURE 1 is an elevation and broken sectional view of a swivel rope Socket in accordance with the invention with the accessl door removed so as to illustrate the removable mandrel within the body of the Socket.

FIGURE 2 is an elevation and broken sectional view taken at a right angle with reference to FIGURE l.

FIGURE 3 is a broken elevation of the upper portion of the swivel rope Socket and showing the access door in its closed position.

FIGURE 4 is a transverse sectional view taken on line 4- 4 of FIGURE 3.

FIGURE 5 is a top plan view with the access door removed, and

FIGURE 6 is a side elevation of the access door.

In the form of the invention shown, there is a cylindrical body 10 having a fishing neck 11 of reduced diameter at its upper end and pipe threads 12 in its lower end for detachably receiving a bit or drill string, not shown. Wrench surfaces 13 are provided in the surface of the body 10 above the lower threads 12.

The drilling cable 14 extends downwardly in a lateral Opening 15 in the upper portion of the body 10 and is connected with a mandrel 16 in an axial bore 17, one side of which is open, as at 18, and in alignment with the first described lateral Opening 15. The Width of the lower Opening 18 is sufiicient to accommodate the mandrel 16 and has Opposing longitudinal grooves 19 for slidably receiving tongues 20 on the sides of an access door, gen- :2,995,79l Ce Patented Aug. 15, 1961 erally designated at 21. The lower inner surface of the door 21 is Offset at 22, Whereas the upper inner surface 23 is adjacent the cable 14 when the door is in its closed position. Lateral ports 24 and 25 are provided in the door 21 and body 10 for fluid relef.

The upper outer surface 26 of the access door 21 is oifset so as to conform with the upper portion of the body 10 and the fishing neck 11. Upwardly of the fishing neck there are external threads 27 integral with the body 10, and corresponding threads 2711 are provided in the upper end of the access door 21 to conform therewith. A cup shaped threaded cap 28 engaging threads 27 and 2711 secures the door 21 in place when in its closed position, and provides' for removal of the door by unscrewing the cap and raising the same u'pwardly along the cable 14.

Referring now to FIGURE 1, the mandrel 16 is babbitted near its lower end, as at 29, to the lower end of the cable 14, and below the babbitt there are internal threads 30 for receiving the threaded upper ends of certain tools, not shown, such as sand purnps, Swabbing tools or certain types of bailers.

In Operation, the mandrel 16 may be readily removed from the body 10 without cutting the cable 14 by unscrewing the cap 28 and slidably removing the door 21. I-Iowever, when the door 21 is in its closed position and the cap 28 is secured in place the assembled tool will withstand violent jarring. Additionally, the described swivel rope Socket is capable of versatile use by reason of the threads 30 in the lower end of the mandrel 16 for connection with various tools having threads in their upper ends.

The invention is not limited to the exemplary construction herein shown and described, but may be made in various ways within the scope of the appended claim.

What is claimed is:

A swivel rope Socket for attachment to the lower end of a drilling cable, Said rope socket comprising a cylindrical body having an axial bore therein extending from the bottom thereof to substantially near the top thereof, a lateral cable receiving Opening extending through the upper portion of said body and communicating with said bore, a door slidably received in the side and upper portion of said body opposite said lateral cable receiving Opening, the inner surface of said door being shaped to extend inwardly of said body to said bore and said cable, a mandrel within said bore, means attaching the upper end of Said mandrel to the lower end of Said drilling cable, threads around the upper end of said body and the upper end of said door, and |a threaded cap engaged On said threads.

References Cited in the file of this patent UNITED STATES PATENTS 2,l23,783 Keltner July 12, 1938 2,483,944 Spang Oct. 4, 1949 FOREIGN PATENTS 656,242 France Dec. 24, 1928 681,566 Great Britain Oct. 29, 1952

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