CN2851548Y

CN2851548Y - Slip type packer

Info

Publication number: CN2851548Y
Application number: CN 200520031053
Authority: CN
Inventors: 李洪春; 王隆慧; 蓝钢华; 冯波; 刘华杰; 马玉生; 刘生福; 刘国梁
Original assignee: Oil Production Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Current assignee: Oil Production Technology Research Institute of Sinopec Zhongyuan Petroleum Engineering Co Ltd
Priority date: 2005-06-20
Filing date: 2005-06-20
Publication date: 2006-12-27
Anticipated expiration: 2015-06-20

Abstract

The utility model discloses a slip type packer which is composed of an upper joint, an adhesive barrel, a center pipe, a seat sealed pressure ring, a seat sealed shear pin, a wedge-shaped body, a slip, a spring, a slip supporter, a leaf spring, a friction block, a centralizing body, a track cover, a track pin and a lower joint, wherein a pressure transmission hole is arranged on the center pipe between the upper joint and the adhesive barrel, the center pipe is sheathed with a bearing piston and the upper end and the lower end of the bearing piston of an outer cover of the pressure transmission hole are provided with sealing rings. When water is only injected in a lower layer, the bearing piston can generate downward acting force under the action of water injection pressure because the pressure transmission hole is arranged on the center pipe, upward acting force generated by lower pressure difference can be balanced, the capability for resisting the lower pressure difference can be raised, and consequently, the aim that the utility model can resist a high lower pressure difference can be achieved.

Description

Slip-type packer

Technical field:

The utility model relates to a kind of slip-type packer, belongs to oil exploitation oil-water well increasing yield and injection layering downhole tool technical field.

Technical background:

Disclosed oil-water well slip-type packer in the prior art; the described structural similarity of its structure and patent No. ZL00241702.2 " large diameter anchor packer "; this packer do not have can balance under the device of the active force that produces of pressure reduction; and it is low to bear down pressure reduction; require to bear simultaneously high upper and lower pressure reduction or use the situation of only bearing relative superiority or inferiority pressure reduction for the dispensing well, just can not satisfy field requirement as the casing protection packer.

Summary of the invention:

The purpose of this utility model is exactly the shortcoming that overcomes prior art; at present on-the-spot the problems referred to above that exist of using; designed a kind of Slips formula packer; can satisfy the various measure needs of work in oil field; simultaneously can bear relative superiority or inferiority pressure reduction again, satisfy the dispensing well or as the field requirement of casing protection packer.

The utility model is made up of top connection, packing element, central tube, seat envelope pressure ring, seat envelope shear pin, sphenoid, slips, spring, slips holder, sheet spring, brake pad, centralizer body, track cover, track pin, lower contact, on the central tube between top connection and the packing element, have pressure transmission hole, and be with pressure-bearing piston, at the two ends up and down of the pressure-bearing piston of pressure transmission hole overcoat sealing ring is installed.

When singly pouring down layer, packer bears down pressure reduction, because its central tube top has pressure transmission hole, under the water injection pressure effect, make pressure-bearing piston produce downward active force, the upwards active force that pressure reduction produces under the balance is improved the anti-pressure reduction ability down of packer, thereby reaches the purpose of bearing relative superiority or inferiority pressure reduction.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model

Accompanying drawing 2-is the utility model A-A sectional drawing

Accompanying drawing 3-is the J type trajectory diagram of track cover 17

The specific embodiment: the utility model is further described below in conjunction with accompanying drawing:

By accompanying drawing 1 as can be known, the utility model is by top connection 1, packing element 6, central tube 7, seat envelope pressure ring 8, seat envelope shear pin 9, sphenoid 10, slips 11, spring 12, slips holder 13, sheet spring 14, brake pad 15, centralizer body 16, track cover 17, track pin 18, lower contact 19 is formed, top connection 1 bottom is threaded with central tube 7 tops and is integral, central tube 7 bottoms are threaded with lower contact 19 tops and are integral, central tube 7 outsides are inserted in packing element 6 from top to bottom, seat envelope pressure ring 8, sphenoid 10, slips 11, slips holder 13, centralizer body 16, track cover 17, on the central tube 7 on packing element 6 tops, have pressure transmission hole 4, and overcoat pressure-bearing piston 3, have the two seals groove on the pressure-bearing piston 3, sealing ring 2 is installed, 5.Seat envelope pressure ring 8 is inserted on the central tube 7 with sphenoid 10 and after being threaded, and is spacing by the shoulder of central tube 7, seals shear pin 9 by seat and links into an integrated entity.Put into slips 11 on sphenoid 10 taper seats, slips 11 is inserted in the open slot in the slips holder 13, and put into spring 12 in the groove between slips 11 and slips holder 13, put into sheet spring 14 and spacing in centralizer body 16 open recess by brake pad 15, by slips holder 13 limiting friction piece 15 tops that are threaded with centralizer body 16, brake pad 15 bottoms are threaded spacing by track cover 17, on the track cover 17, following two ends are connected with the lower end of centralizer body 16 and the upper end of lower contact 19 by screw thread, track pin 18 is put into the circular hole of lower contact 19, and is in the short track of track cover 17, external diameter by central tube 7 blocks spacing again.

Lower contact 19 of the present utility model connects with oil pipe and goes into the well, the process of going into the well track pin 18 is in short track B, between the C and move around, see accompanying drawing 3, upper lifting pipe post after instrument puts in place, make track pin 18 be in the C point of the J type track of track cover 17, the rotation tubing string, because the friction of brake pad 15 and sleeve pipe, make brake pad 15 keep motionless, track pin 18 is in the D point of the J type track of track cover 17, enter long track, transfer tubing string again, top connection 1, pressure-bearing piston 3, packing element 6, central tube 7, seat envelope pressure ring 8, sphenoid 10, lower contact 19 is descending, because brake pad 15 relies on the elastic force of sheet springs 14 to cause the frictional force effect of itself and casing wall motionless, slips 11 struts and firmly is stuck on the internal surface of sleeve pipe, continues to transfer central tube 7 again, sphenoid 10, seat envelope pressure ring 8 is motionless, cut off an envelope shear pin 9, compression packing element 6 makes packing element 6 enlarged-diameter Sealed casing pipe inwalls, realizes the seat envelope of packer.The pressure reduction up and down that packer bears during normal water filling is not worst situation, meets the demands fully; If upper and lower layer has one deck to stop annotating is exactly worst situation, if lower floor stops annotating, packer bears pressure reduction during single notes upper strata, and this packer meets the demands fully; If the upper strata stops annotating, packer bears down pressure reduction when singly pouring down layer, this packer is because its central tube 7 tops have pressure transmission hole 4, the packing sealing function of the

sealing ring

2,5 of pressure-bearing piston 3, under the water injection pressure effect, make pressure-bearing piston 3 produce downward active force, the upwards active force that pressure reduction produces under the balance is improved the anti-pressure reduction ability down of packer, thereby reaches the purpose of bearing relative superiority or inferiority pressure reduction.

Claims

1, a kind of slip-type packer, by top connection (1), packing element (6), central tube (7), seat envelope pressure ring (8), seat envelope shear pin (9), sphenoid (10), slips (11), spring (12), slips holder (13), sheet spring (14), brake pad (15), centralizer body (16), track cover (17), track pin (18), lower contact (19) is formed, it is characterized in that, on the central tube (7) between top connection (1) and the packing element (6), have pressure transmission hole (4), the outer pressure-bearing piston (3) that is with of pressure transmission hole (4) is on the pressure-bearing piston (3) of pressure transmission hole (4) overcoat, following two ends are equipped with sealing ring (2) and (5).

2, slip-type packer according to claim 1, it is spacing to it is characterized in that brake pad (15) bottom is threaded by track cover (17), and track cover (17) upper/lower terminal is connected with the lower end of centralizer body (16) and the upper end of lower contact (19) by screw thread.