US2043341A - Cable head and method of construction - Google Patents

Description

June 9, 1936. G. F. TURECHEK 2,043,341

CABLE HEAD AND METHOD OF CONSTRUCTION File@ Aug. 2o, 19:54

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Patented .lune 9, 1936 PATENT OFFICE CABLE HEAD' AND METHOD OF CONSTRUCTION George F. Turech'ek, Los Angeles, Calif., assgnor to The yTechnicraft Engineering Corp., Los Angeles, Calif., a corporation oi California Application August 20, 1934, Serial No. 740,670

4 Claims. (Cl. 17d-353) My invention relates to'Cable heads and method of construction, and the objects of my invention are:

First, to provide a cable head which is particularly designed for supporting and condlrcting cables such as used in conjunction with electrically operated oil well tools;

Second, to provide a cable head which is adapted to withstand great external hydrostatic pressure without leaking or otherwise giving way;

Third, to provide a cable head wherein all tensional strain on the'conductor is eliminated;

Fourth, to provide a cable head wherein all spaces may be readily and completely i'illed with solid or semi-solid substance to eliminate all air space which might permit the cable to yield to the external pressures encountered when the cable head is submerged to great depths;

Fifth, to provide a novel method of constructing cable heads whereby a molten substance may be poured around the weight supporting lay of the cable without damaging the central conductor core; and

Sixth, to provide on the whole a novel cable head which is simple of construction proportional to its functions, durable, and which will with- 'stand continued use under adverse conditions without deterioration.

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 partial elevational, partial sectional view of .my cable head; Fig. 2 is an enlarged transverse sectional view through 2-2 of Fig. l; and Fig. 3 is a fragmentary, enlarged sectional view of the cable head in the process of construction. v

The cable, designated l, comprises an outer, multi-stranded weight supporting lay la, a centrally disposed conductor lb, separated from the weightA supporting lay la by insulation le, the insulator and conductor forming a core. vThe cable is extended through the bore of a sleeve 2. The bore is flared at its extremities as indicated by 2a, and 2b.

Near one end the sleeve is externally threaded to iit into a shell or cylinder 3. In assembling the cable head, the cable is pulled through the.

sleeve a short distance and the strands of the weight supporting lay peeled back; whereupon an additional wrapping, designated 4, of insula- The strands of the weight 'supporting lay are then partially rearranged, and their extremities are bent outwardly into hook portions ld.

When the sleeve and cylinder are connected, the cable appears as shown in Fig. 3. Asbestos 5 or other suitable heat insulating material is then applied around the bases of the hook portions and into the flared end 2b of the sleeve. A- 5 protector 6 is fitted over the end of the core and against the asbestos 5.' Said protector is in the form of a sleeve with a frusto conical inner end and an internally threaded outer end. The outer end of the protector temporarily receives a tube 10 1. When the parts are arranged as shown in Fig. 3, molten metal of a comparatively low meltf ing point, such as zinc, is poured around the hook portions Id to form a plug 8 as shown in Fig. 1, which not only secures the cable but also grounds the same to the cylinder. The metal is poured until its level is just below the top of the protector 6 and when the metal plug is hardened, thetube 'l is removed. The normally lower end oi the cylinder 3 is 20 externally threaded to screw into a suitable tool, and is internally threaded and enlarged slightly to receive a partition member 9 of insulating material, and a nipple l0 to secure the partition member. 'Ihe partition member 9 carries a ter- 25 minal screw l l, the inner end of which is secured to the conductor lb. Sufficient slack is provided in the core to permit this connection. The space between the partition member and the plug 8 is filled with a suitable insulating compound l2, said compound being heated until melted and poured into the chamber before insertion of the partition member.

the cable.

I claimz- 1. A head for conductor core wire ropes, comprising; an elongated wire rope receiving sleeve: an elongated shell adapted to be screw threaded upon an end of the sleeve to form an enlarged continuation thereof; an anchoring plug arranged to receive the strands of the wire rope and including a central bore loosely receiving said core; an insulating and sealing partition; a terminal means sealed therein arranged to be electrically connected with the extremity ofthe core; means fora-securing said partition at the extremity o1' said shell, said shell forming between the partition-and anchoring plug a chamber adapted to permit looping of said core therein; and an insulatirlg and sealing compound completely lling said chamber.

2. The method oi' securing cable heads to conductor core wire ropes, characterized by; :traying an end oi' the weight supporting strands of the rope to form anchor means; positioning a permanent casing so as to shield the portion of the core within the anchor means and positioning a temporary casing so as .to shield the extended portion of said core; arranging the anchormeans, core and casings in a cable head; pouring while in a molten state a metallic plug in and around said anchor means and around the permanent casing; and removing the temporary casing.

3. The method of securing cable heads to conductor core wire ropes, characterized by: iraying an end of the Weight'supporting strands o thev tremity of the core to a terminal and insulated sealing partition pouring an insulating compound in the extended portion of the cable head; imbedding the excess core in said compound and securing said partition thereagainst whereby the compound completely illls the space between said plug and said partition.

4. In a head for wire ropes having a conductor core and a stranded sheathing: an elongated head structurehaving a constricted sleeve portion arranged to receive a wire rope and an enlarged shell portion arranged to receive the extremity of the wire rope; an anchoring plug in said shell coactingv with the extremities of the stranded sheathing to secure the wire rope relative to said head structure, and having a central bore loosely receiving said core; an insulating and sealing partition; a terminal means sealed therein arranged to be electrically connected with the extremity of the core; means for securing said partition atthe extremity of said shell, said shell forming between the partition and anchoring plug a chamber adapted to permit looping oi said core therein and an insulating and sealing compound completely lling said chamber. l

GEORGE F. TURECHEK.

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