US1436274A - Disk and screw packer - Google Patents

Description

P. H. MACK.

DISK AND SCREW PACKER.

APPL|cAT|oN-F|LED Nov. 28, |919.

Lk@ Patented Nov. 2L 1922,

Patented Nov. 2l, 1922.

narran stares WENT @FFHCEO PATRICK H. MACK, 0F BRADFORD, PENNSYLVANIA, ASSIGNOR T0 OIL WELL SUPPLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A4 CORPORATION OF PENNSYLVANIA.

DISK AND SCREW PACKER.

Application filed November 28, 1919. Serial No. 341,174.

To all w hom t may cof/wem .Y

Be it known that I, PATRICK H. MACK, a citizen of the- United States, residing at Bradford, inthe county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Disk and Screw Packers, of which the following is a specification.

This invention relates to improvements in well packers, and particularly to an im proved packer structure combining what is known commercially as a disk wall packer with threaded or screw means for setting and maintaining the packer in the desired position.

- As is well known to those skilled rin the art, disk wall and hook Wall packers are lowered into position in the well, set, and maintained in operative contact with the wall. of the well, by means of a string of casing or tubing, the weight of the super'- 'imposed casing or tubing being employed to compress and expand the packing element or elements into contact with the wall of the well. Under the above practice, it will be understood that it is necessary to retain the casing or tubing in the well in order to keep the packing in operative engagement with the wall of the well.

One of the objects of my invention is to provide a simple and efficient packer of the class mentioned designed to be set and maintained in operative engagement by means other than the casin tubing, or other superimposed weight. y the employment of my invention, the tubing or casing may be removed from the well without affecting the packerl structure, or the tubing may remain in the well, as heretofore.

` Further objects of the. invention are, to provide simple and positively acting means for setting the packer; to provide a combined disk and screw packer; and a new combination and arrangement of parts whereby the packermay be readily set at any desired level in the well.

In the accompanyingdrawings which illustrate an application of my invention,

Fig. 1 is a.v central longitudinal sectional view of a packer embodying my invention, showing the position of the 'parts of the packer and its relation to the wall of the ,well before thepacker is set;

Fig. 2, a similar View showing the positions of the co-acting parts after the packer is set; I

` Fig. 3, an enlarged detail sectional View of dthe anchor device and co-acting means; an

Fig. 4, a horizontal section takenon line IV-IV-of Fig. 3.

Referring to the drawings, 1 designates a hollow or tubular member constituting the body of the packer; and 2 a cap portion or upper end member of the packer proper. As illustrated and as preferred, the bod 1 is threaded at its upper end, as indicate at 3, and is adapted to have its up er end entered in Aan internally threade portion 4 ofthe cap or u per member 2. Surround- Aing' the packer ody l is a hollow cylinder or annulus 5 made of compressible and ex-k Collar 6 is provided with an annular ortion 8 adapted to be entered in a recess 9 ormed in the cap member 2, and interposed between the upper end of portion 8 and the upper wall of the recess 9, I rovide anti-friction bearing members 10. cured to the lower end of the body 1 is a shoe or other suitable member 11, and 12 designates a telescoping member or sleeve embracing .the body 1 and detachably secured thereto by a disk structure 13. The cap or upper end member and the member l1 constitute opposing end members of the packer structure.

On the body member 1, immediately below the abutment 7 anchor means for securing the packer in the desired position in the well are employed. As illustrated and as preferred, thesey means include a telescoping member, cage or sleeve 12 and slips 14, the

. latter being movably connected with the member 12 by means of arms 15. Slips 14 are normally held out of engagement with' the walls of the well by springs 16, the 105 of the slips. The function of springs 16 in addition to maintaining the slips out ot engagement With the walls of the well, is to prevent the member 12 and the ackerstructure proper from being rotate in the well.

Surrounding the lower end of the body 1 and disposed between the shoe 11 and the lower end of member 12 is a coiled Aspring i 17; this spring is adapted to exert an upward pressure upon member 12. For the purpose of preventing a rotative movement between the body 1 and the cage or member 12, I form a slot 18 in the body and provide the cage 12 with a projecting element 19 adapted to be entered in said slot 18.

The packer structure, as illustrated and as preferred, is designed to be lowered into the well and to be set by a string of casing or tubing. In practice, a letting-in tool, not shown, is attached to the lower section of the casing. This letting-in tool is adapted to be connected with the packer structure by means of acoupling member, or what is known in the trade as an adapter 20. Member 20, as shown, is provided with a bayonet like slot 2 1, and its bore 22 at it supper end is tapered outwardly to allow for the easy entrance into and through the packer of the tubing or casing, and also to accommodate the letting-in tool. This membeL20, at its lower end, is internally threaded and is adapted to receive a coupling member 23 designed to connect the lower end of member 20 with the upper end of cap 2, the cap for this purpose being provided with an internally threaded portion 24.

The disk structure 13 has arms 26 designed to be entered in openings 27 and 28 respectively formed in the body and the member 12. It will be understood that the function of the disk is to connect the body and member 12 and prevent a relative lonl gitudinal movement between the body'and said member until the anchor mechanlsm is section of the tubin member.

In lowering and setting the` acker in the Well, a letting-in tool is attache to the lower and said tool in turn connectedwith mem er 20. The tubing and packer, etc., are then lowered until the packer reaches the desired position, when a weight is dropped through the tubing to set` the anchor mechanism, as above described. A rotative movement is then imparted to member 2O and to cap 2compressing and expanding packing 5 and forcing the abutment downwardly and behind the slips. It

will thus be noted that the packer is set by a threading action and not by the weight of the tubing. After the packer is set, the letting-in tool is disconnected and said tool, together with the tubing, withdrawn from the well.

What I claim is:

1. In a well acker, a body member -having a threadedp upper portion, a telescoping slip carrying member, means for positively preventing relative rotation between the slip carrying member and the body member, a acking member, and a threaded upper mem er cooperating with the threaded portion of the body -to effect an expansion of the packing member.

2. In a well packer, a body member having a threaded upper portion, a telescoping slip carrying member mounted on the body, slips, means on the slip carrying member for preventin it from rotating in .the well a threaded upper member cooperating with the said threaded portion of the body to effect an expansion of the packing.

3. In a well packer, a one-piece body member, an anchor structure movable lon-A gitudinally on the body, means for xing the anchor with relation to the body and releasing it therefrom while in the well, means for positively preventing relative rotation between the anchor means' and the body member, a vpacking member mounted on the body, and threaded elements cooperating with the body to eiect an expansion of the packing. I

Il. In a combined disk and screw packer, the combination with a bod4 member, an upper threaded member to w ich the body member isconnected, an annular abutment slidable on said body member, a lowertelescoping member below the annular abutment, slips carried by tle telescoping member and engagingl the annular abutment and arranged to be expanded thereby, a disk structure for xing'the Ytelescoping member with relation to the bod and for releasing it therefrom while in t e well, a packing member on the body extending between the upper threaded member and the annular abutment and adapted to be compressed and expanded by a threading movement ofsaid upper threaded member on the body member, said packing member serving also to urge the annular abutment downwardly when being compressed to thereby force the slips into tighter engagement with the sides of the well. p

5. A combined disk and Ascrew packer including a body member, having an upper threaded portion, an upper threaded member to which the body is connected, a lower a spring surrounding the body and exerting pressure against the telescoping member,l a packing member mounted on the body and adapted to becompressed and expanded by a threading movement of said upper threaded member on the upper threaded portion of the body.

d. A well packer comprising a body member formed .of a scingle piece of tube having slots in the lower end thereof, a slip carryingl member mounted on the lower portion of said body and having pins engaging in said slots to prevent rotative movementof the slip carrying member on said body, slips carried by the slip carrying member, means for expanding the slips upon longitudinal movement of the slip carrying member, means for effecting a longitudinal movement of the slip carrying member, a packer on said body-member, and threaded means at the other end of said body member for compressing the packing.

7. A well packer comprising a body member formed of a single piece of tube having slots in the lower end thereof, a slip carrying member mounted on the lower portion of said body having `pins therein engaging in sald slots to prevent rota-tive movement of the slip carryin member on said body, slips carrie by the s ip carrying member, means for expanding the slips upon longitudinal movement of the slip carrying member, springs-on the slip carrying member engaging said slips and adapted to engage the walls of the well to hold said slip carrying member` from rotation when said slips have been expanded, means for effecting the longltudinal movement of the slip carrying member, a packer on said body member, and threaded means at the other end of said body member for compressing the packing.

8. ln a well packer, a body member having a threaded upper portion, a. telescoping slip carrying member mounted on the body, means on the slip carrying member for positively preventing relative rotative movement between the slip carrying member and the body member, slips, a packing member mounted on the body, a threaded upper member cooperating with said threaded portion ofthe body to effect an expansion of the packing, a coupling'member threaded to said threaded upper member, and an adapter threaded to said coupling member.

In testimony whereof I aiiix my signature in presenceof two witnesses.

PATRICK H. MACK.

Witnesses:

RALPH WHEELER, W. E. BURDICK.

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