US1689956A - Well packer - Google Patents

Description

Oct. 30, 1928.

v c. R. MEEKER WELL PACKER Fild Nov. 11, 1925 INVENTOR.

v ATTORNEY Patented Oct. 30, 1928.

TES

UNITED STA GHARLES R. MEEKER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO OIL WELL SUP- PLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

WELL PACKER.

Application filed November 11. 1925. Serial No. 68,322.

This invention relates to oil well packers of the type employing a cage loosely mounted on the body O' the packer and slip or a plurality of slips carried by the cage; more particularly, the present invention relates to a new and 'improved cage and slip Construction for such packers.

In the use of packers of the character mentioned, it has been found that the engagement of the slips with the pipe or casing has not been as secure or effective as desirable, this is especially so where the interior of the pipo or casing is not uniform or perfectly round. In the cage and slip constr'uction heretofore employed, no means are provided for an independent operation of a slip, that is to say, all of the slips in the operation of expanding them or forcing them against the casing, operate inunison and in a similar manner, consequently should the pipe or casing in which the packer is set be otherwise than perfectly round, the slip contact will be insecure. L

Among the objects of my invention are, to provide a cage and slip Construction in which the slips have an independent and variable movement in the operation of setting the packer or expanding the slips, and a construotion in which each slip may be individually adjusted to make secure contact with thepipe, even though the interior of the pipe be nperfect or not perfectly round.

In the accompanying drawing, which illustrates an application of my invention,

Figure 1, `is an elevation view of an oil well packer showing the cage and slip construction with the slips collapsed Figure 2, a vertical sectional view of the packer showing the packing and slips expanded; and n Figure 3, a detail elevational view partcularly showin a slip and the manner of connecting the s ip to the cage. p

iilustrated, 1 designates the hollow body of a well packer; 2, the lower connecting member; and 3, the upr connecting Inember; each of said Inem rs being threadcd to the body 1.

surrounding the body, and disposed in contact with the upper coilar or member 3, is a acking element 4. Packin 4 is held on the body between member 3 an an annular slding wedge 5, the latter being adapted to be orced downwardly between the upper end:

of a series of slips 6 and the body, for the purpose of expanding the slips and causing them to engage the interior of a pipe or casing in which the packer is to be set.

Slips 6 are each formed with a recessed shank portion 7, the recess 8 thereof being disposed centrally of the shank and extending throughout its length. The shank of each of the slips is further provided with bevelled side edges 9 and a curved bevelled bottom edge 10.

Loosely mounted on the body and designed to Carry the slips 6, is a cage 11. Cage 11 has a downwardly projecting part 12 adapted to cooperate with a pin 13 on the body for maintaining the slips and the other parts in the position shown by Figure 1,' during the act of letting the packer down into a well.

Gage 11 carries the slips 6,'said slips being movably connected with the cage by a series of leaf spring members 14:.

As shown, each member 14 is fixedly secured at its lower end by rivets 15 or other suitable means to the slip-cage; the upper end of the respective members 14 is fiattened and is provided with a central vertically extending slot 16. Slot 16 has a rivet 17 passed therethrough, said rivet extending into the shank portion 7 thus forming a movable engagement between the slip and its member 14 thereby permitting the slip to move longitudinally relatively to its connecting spring member and the cage should a portion of the pipe, otherwise than round, be encountered by the slip in the act of setting the packer. In other words, with the'construction just described, I provide each slip with an independent movable engagement between its shank portion and its spring member 14, and also between the respective shanks and 'the cage.

The prime object of the movable engagement between the slip and its cage is to provide, in addition to the tilting action, a longitudinal or vertical sliding movement between each slip and its cage. It is evident that a vertical sliding movement between the slips and their cage may be eflected by reversing the slot and pin Construction or by fixedly attaching the upper end of the spring member to the shank of the slip and movably securing the lower end of member 14 to the cage.

As shown, and as referred, the cage is formed with a plur ity of slip receiving openings havin bevelled or undercut walls 18 and a curved wall 19, said walls 18 being adapted to engage the side edges 9 of the slips and the wall 19 the bottom edge 10 of the respective slips.

What I claim is 1. In a packer, a body, a cage loosely mounted on the body, a slp receiving opening in the cage, a slip mounted in the said opening, a spring member having a slot therein, means passed through the slot and mov able therein for movably connecting the slip and spring member, and means for fixedly engaging the said member and cage.

2. In a packer, a body, a cage loosely mounted on the body, having a slip receiving opening, a slip carried by the cage and having edges cooperating with the walls of said opening, means connecting the slip and cage whereby a vertical movement of the slip relaing the slps and cage whereby vertical movement of the sli s relatively to the cage may be effected, inclu ing a spring member having a slot therein and a member entered in the slot.

4. In a packer, a body, a cage having a series of slip receivin openings therein, a series of slips carried y the cage, said slps mounted in said openings and having edges engaging the walls thereo'f, and means providing a longitudnal sliding engagement between the slips and the cage, said means including independent governing members for regulating the movement of the slips and connecting the slips to the cage.

In testimony whereof I afiix my signature.

CHARLES R. MEEKER

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