US2114988A - Slip socket - Google Patents

Description

April 19, 193s. J, ANTHONY' l2,114,988

l sL-IP SOCKET Filed AprilY 26, 1935 Jy'y vm' alega?.

INVENTOR d A 2% zdf f7 any Patented Apr. 19, 1938 U N1 'I' ED .S TA 'I'EL-S SLIP SOCKET Jack Anthony, Tulsa, .-Okla., assignor, by mesne assignments, of sixty percent `to Frank vl. `Collins and .forty Apercent to George Krell, both of Sapulpa, Okla.

vAltbpliczltin .'April 26, 1935, Serial 'N0. 118,333

`6 Claims.

V'I'his invention l'relates to slip sockets, :particularly to :those-of the `character employed `in'the recovery of broken or disconnected -Ysucker rods from wells and has for yits principal object to provide a slip socket Vhaving a single slip-capable of suicient iiexibility to grip any portion of .a broken or disconnected rod that may be left in :a well.

`It is also an important object of the invention to provide a slip of unitary construction and having substantially the same degree of :eXpansibility throughout the length thereof `whereby the slip has more extended bearing surface in engagement with'the socket. f

In accomplishing -these .and other objects of the invention, as hereinafter pointed out, .I have provided Aimproved details of structure, the preferred forms of lwhich are illustrated in the accompanying drawing, wherein:

Fig. 1 is a vertical section .through a portion of a well and its tubing containing a broken sucker rod and showing my .improved socket in suspended position to engage over the brokenlend of the rod. Y

Fig. 2 is an enlarged vertical section through the slip socket showingV the slip element engaged with the rod.

Fig. 3 is a horizontal sectionvon the line -3-'3, Fig. 2.

Fig. 4 is a detail perspective viewgo'f the slip.

Fig. 5 is an .end view of the slip.

Fig. 6 is a vertical section through a modified form of slip.

Referring more in detail to the drawing:

I designates the bore hole of a well having a casing 2 in which is suspended a string of well tubing 3 wherein a string of sucker rods has been broken to leave a portion of the string within the tubing as indicated by the numeral 4. n

As above pointed out', the present invention contemplates a slip socket 5 that is lowered through the tubing 3 by means of a connected string of sucker rods 6 to grip the broken end of the rod 4 and effect its withdrawal from the well.

In the present invention the slip socket includes a cylindrical barrel portion 'I having a downwardly tapering inner bore 8 in which is slidably mounted a slip 9 embodying the features of the invention as hereinafter described.

The lower end of the barrel l has a bevelled edge sloping upwardly and inwardly in the direction of the bore 8 to form a guide lip I Il for directing the barrel over` the broken end of the rod when the slip socket is lowered into'the tubing; The Iopposite end Aof the barrel is Vinternally threaded ==as at II and Vengaged therein is the threaded end I-2 of a head I3.

The headf'l 'includes an annular flange portion I4 that 'seats squarely against the upper end I5 -5' of the barrel and projecting upwardly therefrom isa reduced'cylindrical'portion i6 which terminates :ina threaded pin Ig'i adapted to be engaged by'the'boxend I8 Ycarried on the lower end of the sucker rods 6 wherewith the slip socket is lowered into fa lwell. The cylindrical portion I6 -of the head has the sides thereof iiattened as at 'I9 to facilitate application of a wrench wherewith the slip socket is connected and disconnected from the suckerl rods.

'The slip 9 is'preferably formed of spring material and comprises a substantially sleeve like body having its outer circumferential face 2B tapered to vconform tothe taper of the socket bore 8 and is-of `4sui'icient length'to provide an ample gripping surface to assure positive grip on the loose end-of the sucker rod. y

The inner-circumferential lface 2| of the slip is provided with a series of circularly arranged V-shapedgrooves 22 having horizontal faces 23 and having inclined circumferential faces'24 converging inwardly toward the upper end of theV slip to connectY the outer periphery of a lower face 23 with the inner periphery of a next-adja y cent upper faceand form a lseries of gripping teeth 25 adapted 'to engage and., bite into the sucker rod as later described;

The inner diameters of the teeth 25 at the lower end of the slip are preferably of larger diameter than the upper end of the slip as best shown in Fig. 2 so as to insure engagement of at least one set of teeth with the portion of the rod to be removed from the well.

For example, if the rod is of small diameter, and will pass the set of teeth in the lower end of the slip they will be engaged with the teeth at the upper end of the slip; however, if the rod is of large diameter, it will be engaged by the teeth in the lower end of the slip. The lower or entrance end 26V of the slip is bevelled downwardly and outwardly toward the circumferential wall of the socket so as to cooperate with the correspondingly bevelled edge IB to assist in guiding the socket over the broken end of the rod.

In order to provide iiexibility of the slip, it is provided with a series of circumferentially spaced slits 2l extending from the lower end thereof to a point adjacent the upper end to leave connecting portions 28 while the opposite end of the slip has slits 29 extending downwardly at points contract uniformly throughout its entire length Y to maintain substantially Vthe entire outer circumference in bearing contact with the tapered portion of the socket.

into.

- gaged with the tapered bore of the Vsocket which The slip thus constructed is normally retained in the lower constricted end of the bore by means of a coil spring 3| having one end engaging against the head I3 and its opposite end engaging against a washer 32 seated against the upper end of the slip as clearly shown in Fig. 2.

In the form of slip shown in Fig. 6, the inner circumferential face 33 thereof is provided with a plurality of teeth 34 gradually tapering in diameter from the lower end of the slip to the upper end thereof. Otherwise, the construction of the slip is similar to that of the preferred form of invention.

In using a slip socket equipped with a slip constructed as described, the slip socket is coupled onto the sucker rod 6 and lowered through the tubing as shown in Fig. 1 until the bevelled end l0 of the socket engages against the broken end of the sucker rod. Continued downward movementof the socket vcauses the bevelled end l to guide the broken end of the sucker rod into the slip until stopped by engagement of theY teeth, whereupon further downward movement of the socket will effect compression of the spring 3| and movement of the slip toward the upper end of the socket, thereby allowing the slip to expand and permit further entrance of the broken rod there- The slip socket is then raised so that the power of the spring urges the slip into gripping engagement with the rod. Continued upward lift of the socket then causes the slip to be wedgingly encauses diametrical contraction and thereby enhances gripping engagement of the teeth.

After the rod has thus been firmly engaged by the teeth of the slip, the slip is removed carrying the broken end of the rod therewith.

From the foregoing it is apparent that I have provided a slip and slip socket construction which rmly and positively grips the rod and is readily adaptable to various diameter rods or to the pin of a rod in case a section of the rod has become accidentally disconnected at one of the joints.

What I claim and desire to secure by Letters Patent is: Y

1. In an apparatus of the character described including a slip socket, a slip in the socket 'comprising a substantially cylindrical body provided with toothed gripping portions and having slits alternately extending from the respective ends thereof and through the toothed gripping portions.

2. In an apparatus of the character described including a slip socket, a slip in the socket comprising a substantially cylindrical body provided with sets of toothed gripping portions respectively located at the ends of the slip and having slits alternately extending from the respective ends thereof and through the sets of toothed gripping portions. Y

3. Ina device of the character described, a slip socket, and a slip in the'socket'having a plurality k of sections' with the sections connected at alternate ends of the slip whereby the slip is capable of diametric variation throughout the entire length of the slip when the slip is moved in said socket.

4. A slip comprising a substantially cylindrical sleeve-like body provided with gripping portions and having slits extending from the respective ends thereof and through the gripping portions in alternately staggered relation whereby the slip is contractible throughout the entire length thereof.

5. A slip comprising a substantially tapered sleeve-like body having slits extending from one end thereof and intermediately arranged slits extending from the other end in substantially coextensive relation with the first named slits to provide a plurality of interconnected gripping sections.

6. A slip comprising a tapered sleeve-like body formed of spring materialhaving slits alternately extending from the respective ends thereof and in substantially coextensive relation to form a plurality of rinterconnected flexible gripping sections whereby the slip isV contractible throughout its entire length.

JACK ANTHONY.

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