US1678829A - Packer slip socket - Google Patents

Description

Juy 3E, i928. 1,678,829

T G. A. SCOTT ET AL,

PACKER SLIP SOCKET Filed June 29, 1927 M 7 l/ f/ 2.

' I `M lmmwd atented Jul/y 31, 1928.

UNITED STATES' PATENT oFFlcE.

I GLENN A. SCOTT A ND JAMES M. COCHRAN, OF VENTURA, CALIFORNIA.

PACKER SLIP SOCKET.

Application filed June 29, 1927, serial No. 202,242.

This inventlon relates to packer slip sockets, and is more particularly related to a slip socket for use in packing oil casing and drill pipe in an oil Well or during the drilling of an o-il Well.

Slip sockets are used for the purpose of gripping casing or drill pipe that has been lost in the well. In the withdrawing of the casing or drill pipe from the well or after the same has been gripped, it is often desired to pack olf the connection between the slip socket and the casing or drill pipe which has beengripped, in order that the flushing liquid -ma be forced through the pipe carrying the sip socket and through the casing or' drill pipe which has been gripped, in order to aid in releasing the caslng or drill pipe from the well at the end thereof to brezk the hold on the pipe at the foot of the we It is therefore an object of this invention to provide a packer slip socket which is adapted to be secured to a pipe and lowered into the well to grip casing or drill pipe, and in which slip socket, means are provided for packing off the connection between the pipe carrying the sli socket and the casing or drill pipe gripped? Another object of this invention is to provide a packer slip socket including a body carryingin the central bore thereof a sleeve, within which gripping jaws or slips are mounted, and intermediate which sleeve and a shoulder formed in the body there is mounted a packing sleeve which is compressed outwardlyV when the casing or drill pipe is gripped by the load imparted through the slips onto one end of the packing sleeve. so that the packing sleeve is expanded outwardly to make a fluid tight connection between the slip socket and the well casing or drill pipe.

Another object of this invention is to provide a packer Slip socket which is adapted to be secured to a pipe and lowered into a well to grip a section of like pipe hung up or stuck in the well and provide a packed coupling which may be left in the well.

Another object of this invention is to provide a means of gripping a parted casing` or drill stem, to be used in place of the commonly used die nipple, and which will slip over the end of the parted casing and grip the same so as to permit the continuation of the drilling operation without the necessity of rotating the casing or drill pipe to cut threads on the 'parted section of pipe.

Other objects and advantages of this invention will be apparent from the following detailed description of a preferred embodiment thereof, as illustrated in the accompanying drawings.

In the drawings Figure 1 is a side elevation of a slip socket embodying this invention, illustrating the same a'ssuspended within an oil well by a pipe and gripping a drill pipe or casing shown in section.

Figure 2 is a sectional side elevation of a packer slip socket embodying'this invention.

Figure 3 is an end sectional view taken substantially on the line 3 3 of Fig. 2.

In the preferred embodiment of this invention illustrated in the accompanying drawings, 1 illustrates the outer casing of an oil well within which acasing or drill pipe 2 has been inserted and lost. A. packer slip socket 3 embodying this invention is illustrated as secured to a pipe 4a and lowered into the well through the casing 1 to grip the casing or drill pipe 2. p The packer slip socket 3 comprises a tubular body 4, which has. formed at its upper end a tool joint 5, by means of which the same is screw-threaded to a section of the pipe 4a, the threads 6 being preferably rightha-nd threads. Screw-threaded at the lower end of the body 4 is a bell collar 7 which is open at its lower end 8. The bell collar 7 is preferably tapered throughout its length to an edge, as illustrated at 9, so as to permit easy positioning of the collar 7 over the casing or drill pipe which has been lost in the well. The bell collar 7 is internally screw-threaded to the body 4 and provides a circumferential shoulder 10 at its upper end, upon which a packing sleeve 11 rests. The packing sleeve 11 may be of any desired or suitable construction and may be constructed of any suitable material such, for eX- .ample, as rubber canvas composition.

Slidably mounted within the body 4 above the packing sleeve 11 and in position so that the same rests upon the upper edge 12 thereof, is a tapered sleeve 13. The sleeve 13 is tapered outwardly from its lower to its upper end and mounted within the sleeve 13 are slips or gripping members erably\the edges of left-hand threads which are formed within the sleeve 13.

Means \are preferably provided for preventing the rotating of the sleeve 13 and slips 14 within the body 4, s0 as'to enable the backingfofi' of the slips 14 from gripping the drill pipe 'for casingwhen it is found impossible..orimpractical to jar loose the drill. pipe or casing.wlforthispurpose, keys 15 are provided'-which fit withinf slots 16 formed through the sleeve 13 and into slots formed in the outer periphery of the slips 14, and.A also fit Within'keyways or slots formed in the innerefsurfacel of the body 4, n order intoz-"r permit the easy assembly' of the packer slip socket, 'the keys 15 are preferably mounted between the edges of the two slips 14 so that the same may be easily inserted in position from the end of the body 4. f

In operation,4 the packer slip socket is insertedinto `the well on the tubing 4 until` the bell collar -engagesand isv slipped over a drill pipejgofncasing. 'As the drill pipe or casing passesjthrough the slips 14, the

slip socket is "raised by Vpulling upward'on the pipe 4a until the slips 14 engage the drill pipe or casing. On lcontinuin'g the raising of the-slip socket so that there isv a load imposedi'pon' the slips14, the `slips 14 impart a pressure throughy the sleeve 13 onto the uppe'rfe'dge yof the packing sleeve 13 to expand the? same outwardly against the drill pipe or"jcasing and against ythe inner wall or surface of the body 4 of the packer slip socket, thereby providing a fluid tight connection between the drill pipe or casingy and the slip socket. p

Having fully described the` preferred embodiment of our invention, it is lto be understoodthat we do not Wishl to be limited to the eXact details herein set forth, which may obviously be varied without departing from the spirit of our invention as set forth in the appended claims.

1. In a device of the class described, the combination of a tubular body having a circumferential shoulder 'at its upper end forming an abutment, a bell collar secured to the lower end thereof and providing a circumferential shoulder at its upper end, a packing sleeve mounted within the body and resting on the shoulder, a sleeve slidably mounted within the body in position to engage the upper edge of the packing sleeve and the shoulder at the upper end of the tubular body, and slips mounted in the slidably mounted sleeve.

2. In' a device of the class described, the combination of a tubular body having a lchamber therein with an inwardly extending annular shoulder at its upper extremity` a bell collar secured within the lower end of the body providing a circumferential abutment at its upper edge, a packing sleeve mounted within the body and resting on said abutment, a sleeve slidably mounted within the chamber of the body engaging the upper end of-the packing sleeve and confined between the sleeve and the said shoulder, and slips mounted in the slide ably mounted sleeve.

Signed at Ventura, California, this 16 day of June, 1927.

GLENN A. SCOTT. JAMES M. COCHRAN.

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