US2119797A - Slip type releasing socket - Google Patents

Description

N lum@ `Pune 7, 1938. s. SIRACUSA 2,119,797

SLIP TYPE RELEASING SOCKET Filed Feb. 5, 1956 i J/vmvToR.

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Patented .une 7, 1938 UNITED STA-TES.

PATENT vorrici:

2,119,797 SLIP TYPE RELEASING SOCKET' Sisti Siracusa, Huntington Beach, Calif.

Application February 5, 1936, Serial No. 62,407

2 Claims.

This invention relates to a slip type releasing socket, by means of which certain tools or appliances may be removed from a well in event that said tools or appliances become separated 5 from the rest of the equipment.

An object of my invention is to provide a releasing socket, the slips of which have a spring action within themselves which tends to force them inwardly against the appliance to be recovered whereby said slips are moved into a position to firmly grip the appliance.

Another object is to provide a releasing socket of the character stated in which the slips are non-rotatably held relative to the body of the tool when said slips are engaging the lish.

A feature of my invention is the combination of a novel packing rubber in the socket which is forced against the surface of the fish when the tool is in operation.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing Figure 1 is a quarter sectional view of my releasing socket with the slips in released position.

Figure 2 is a view similar to Fig. 1, but with the slips in engaged position.

Figure 3 is 'a side elevation of the slip assembly.

Figure 4 is a bottom plan view of the slip assembly.

Figure 5 is a transverse sectional view of the shell only, taken on line 5-5 of Fig. 2.

Referring more particularly to the drawing, my socket includes a shell I on the upper end of which a collar 2 is screwed. The drill pipe (not shown) screws into the collar 2. 'Ihe usual circulating bore 3 is provided in the collar so that the circulating mud can be forced downwardly into the shell I.

A shoe 4 screws onto the bottom of the shell I for the purpose of guiding the iish into the shell. An annular rubber packer 5 is provided in the shell I above the shoe 4, and this packer is provided with an annular lip 6 on the inner surface thereof, the purpose of which is to tightly grip the surface of the fish, due to the mud pressure within the shell I. That is, the pressure will be exerted between the lip 6 and the outer wall of the packer, thus forcing the flexible lip inwardly against the surface of the iish.

'I'he slip assembly 'I is mounted in the shell I and comprises a solid ring 8 and a plurality of fingers 9, which depend therefrom. The inner face of each of the fingers 9 is formed with helical or inclined wickers I0 which grip the iish, as will be further described.

Each of the ngers 9 is separated by a vertical slot IIL A pin I2 extends inwardly from the wall of the shell I and is adapted to fit in one of the slots II. A bayonet slot I3 extends from the slot II in which the pin I2 operates.v In raised, or released position, asrshown in Fig. 1, the pin I2 extends into the slot I3, thus holding the slip assembly, as shown. The fingers 9 have a tendency to spring inwardly to engage the fish. Consequently, when the tool is lowered over the fish, the wickers I0 will engage the same, and the shell I is then pulled upwardly, forcing the fingers 9 into the tapered seat and thus further forcing and holding the fingers in the fish. The pin I2 is in the slot I I when the tool is being lowered inthe well, and the slip assembly is free to drop downwardly to the position shown in Fig. 2. In this position, the slip assembly cannot rotate relative tothe shell, as will be further described.

An annular tapered seat I4 is provided within' the shell I and when theV slip assembly drops downwardly, the lower or wicker portions of the ngers 9 are pressed inwardly against the fish, due to the tapered seat I4, and also due to the 'taper on the lower portion of the slipassembly.

When the slip assembly 'I is in the lowered position, as shown in Fig. 2, said assembly is nonrotatably held relative to the shell I, by the following arrangement-the shell I is provided with a plurality of inwardly extending lugs I6 on the tapered seat I4. Two are shown in the present instance. The lugs I6 enter the slots II when the slip assembly is in the position shown in Fig. 2. Consequently, the slip assembly is non-rotatably held relative to the shell I, and the wickers will therefore more effectively grip and hold the fish, even tho it should be necessary to rotate the drill pipe and screw the wickers off of the sh.

When entering the well, the pin I2 is positioned in the slot II so that the slip assembly is free to move vertically.v When the tool is withdrawn from the well, and to prevent engagement of the fish, the pin I2 is moved into the bayonet slot 'I3 by first lowering the shell I, and then rotating said shell to the right. Y

Having described my invention, I claim:

1. A slip type releasing socket comprising a shell, a slip assembly in the shell including a ring, a plurality of fingers depending from the ring,

2. A slip type releasing socket comprising all shell, a slip assembly in the shell including a ring;

a plurality of fingers depending from the ring,

wickers on the inner face of each of said fingers, said slip assembly having vertical slots between adjacent lingers and a bayonet slot extending from one of the Vertical slots, a pin projecting inwardly from the shell into the bayonet slot, said fingers being sprung inwardly to grip a fish, a tapered seat in the shell against which the lingers rest'I when in lowered position, inwardly extending lugs on the tapered seat, said lugs extending into the Vertical slots between the fingers whereby the slip assembly is non-rotatably held only when in lowered position.

SISTI SIRACUSA.

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