CN201314217Y

CN201314217Y - Release packer

Info

Publication number: CN201314217Y
Application number: CNU2008202265929U
Authority: CN
Inventors: 曲少坤; 王峰; 张新建
Original assignee: Dongying City Zhaoxin Industry & Trade Co Ltd
Current assignee: Dongying City Zhaoxin Industry & Trade Co Ltd
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2009-09-23
Anticipated expiration: 2018-12-15

Abstract

A release packer comprises a hanging pipe hung by a locking claw at the lower part of an upper adapter, a release pipe mounted in the upper adapter and a hanging adapter mounted at the lower part of the hanging pipe; the lower part of the hanging adapter is coupled with the upper part of an upper inner pipe, an upper packer rubber is sleeved outside an upper packer rubber shaft, the lower part of the upper packer rubber shaft is coupled with a cone, the cone and a slip sleeve are coupled through a setting shear pin, a slip is mounted at the window of the slip sleeve, the inner pipe is coupled with a lower inner pipe, a hydraulic cylinder is sleeved outside the lower inner pipe, an upper cavity and a lower cavity are formed between the hydraulic cylinder and the lower inner pipe, a lower plunger is mounted in the lower cavity, a locking sleeve is arranged under the lower plunger, a locking ring is arranged on the locking sleeve, a lower packer rubber shaft is sleeved at the lower part of the lower inner pipe and fixed on the lower inner pipe through a releasing shear pin, and a lower packer rubber is sleeved outside the lower packer rubber shaft. During the inwardly suppressing operation, the slip is anchored, and a sleeve is sealed by the upper packer rubber and the lower packer rubber so as to realize the oil recovery. The slip is positioned between the upper packer rubber and the lower packer rubber, sealed by the packer rubbers, and can not be affected by sand and dirt; therefore, the releasing can be carried out smoothly, and jam-releasing is no need when pipes are blocked.

Description

Back-off packer

One, technical field

The utility model is the laminated distributor under well oil tool of oil field oil recovery usefulness, particularly a kind of back-off packer.

Two, background technology

Implement layering card water blockoff oil recovery technique, envelope is fallen high aquifer, is the effective way that the control well water rises.Layering card water blockoff will adopt packer, and existing packer kind is more, but has that easy inefficacy, downslide, supporting capacity are low, the construction success rate is low and problem such as deblocking difficulty.It is to suppress the seat envelope after bringing it into the oil reservoir position by oil pipe that there is one type packer at the scene, and then oil pipe separated with packer, realize that this process scene is called to give up that the packer that is adopted is the Y445 packer, this packer grappling and compression packing element adopt same set of mechanism, though simple in structure, unreliable, easy fouling of slips and sand card, cause the deblocking difficulty, need carry out the unfreezing operation, the workover cost height can not use.

Three, summary of the invention

The purpose of this utility model is a kind of back-off packer of design, guarantees sealing, and deblocking is reliable, reduces workover cost.

The purpose of this utility model is achieved in that by top connection, the shear pin of giving up, releasing tube, suspended tubes, fishing joint, suspension joint, pipe in going up, last packing element, last packing element axle, cone, seat envelope shear pin, slips, slip sleeve, hydraulic cylinder, pipe down, lower piston, lock tube, lock ring, the deblocking shear pin, lower rubber cylinder, the lower rubber cylinder axle, circlip is formed, the lock pawl of top connection bottom tangles suspended tubes, releasing tube is installed in the top connection, suspension joint is installed in the suspended tubes bottom, fishing joint is suspended on the suspension joint, the suspension joint bottom connects with last interior pipe top, last packing element axis suspension is in last on the pipe, the gluing jacket casing is contained in outside the packing element axle, last packing element is under the suspension joint, last packing element axle bottom connects with cone, cone is connected by seat envelope shear pin with slip sleeve, slips is installed in the window place of slip sleeve, the conical surface of slips contacts with the conical surface of cone, the pipe bottom connects with following interior pipe top in going up, hydraulic cylinder is contained in down outside the interior pipe, form upper chamber and lower chambers between hydraulic cylinder and the down interior pipe, in bottom chamber lower piston is installed, it under the lower piston lock tube, lock ring is arranged on the lock tube, pipe bottom suit lower rubber cylinder axle down, the lower rubber cylinder axle is fixed on down on the interior pipe by the deblocking shear pin, the lower rubber cylinder outer shaft sleeve loads packing element, flexible back-up ring in the lower piston has circlip groove on the down interior pipe.

The beneficial effects of the utility model are: when inwardly suppressing, make slips anchoring, last packing element, lower rubber cylinder expansion Sealed casing pipe can reach layering card water blockoff oil recovery requirement.Slips is between packing element, the lower rubber cylinder, by the packing element packing, can not be subjected to the influence of sand and dirt, and therefore, deblocking the problem that the card pipe needs unfreezing can not occur smoothly.

Four, description of drawings

Accompanying drawing is the assembling drawing of the utility model embodiment.

Five, the specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

By top connection 1, the shear pin 2 of giving up, releasing tube 3, suspended tubes 4, fishing joint 5, suspension joint 6, pipe 7 in going up, last packing element 8, last packing element axle 9, cone 10, seat envelope shear pin 11, slips 12, slip sleeve 13, hydraulic cylinder 14, pipe 15 down, lower piston 16, lock tube 17, lock ring 18, deblocking shear pin 19, lower rubber cylinder 20, lower rubber cylinder axle 21, circlip 22 is formed, the lock pawl 23 of top connection 1 bottom tangles suspended tubes 4, releasing tube 3 is installed in the top connection 1, suspension joint 6 is installed in suspended tubes 4 bottoms, fishing joint 5 is suspended on the suspension joint 6, suspension joint 6 bottoms connect with last interior pipe 7 tops, manage on 7 in last packing element axle 9 is suspended on, last packing element 8 is sleeved on outside the packing element axle 9, last packing element 8 is under the suspension joint 6, last packing element axle 9 bottoms connect with cone 10, cone 10 is connected by seat envelope shear pin 11 with slip sleeve 13, slips 12 is installed in the window place of slip sleeve 13, the conical surface of slips 12 contacts with the conical surface of cone 10, pipe 7 bottoms connect with following interior pipe 15 tops in going up, manage outside 15 in hydraulic cylinder 14 is sleeved on down, form upper chamber 24 and lower chambers 25 between hydraulic cylinder 14 and the interior down pipe 15, lower piston 16 is installed in lower chambers 26, it under the lower piston 16 lock tube 17, lock ring 18 is arranged on the lock tube 17, pipe 15 bottom suit lower rubber cylinder axles 21 down, lower rubber cylinder axle 21 is fixed on down on the interior pipe by deblocking shear pin 19, lower rubber cylinder axle 21 overcoats load packing element 20, flexible back-up ring 22 in the lower piston 16 has circlip groove 26 on the interior down pipe 15.Internal thread is arranged at fishing joint 5 tops, is convenient to salvage.

When envelope seat, inwardly to suppress, hydraulic pressure linked hole on the pipe 15 in down imports 25 li of upper chamber 24 and lower chambers into, cut off an envelope shear pin 11, promote that hydraulic cylinder 14, lock ring are 18 up, lower piston 16, lock tube 17 be descending, makes slips 12 grapplings, last packing element 8, lower rubber cylinder 20 are expanded Sealed casing pipes.Circlip 22 enters 26 li of circlip grooves, and (16 are locked in down on the interior pipe 15, and lock ring 18 is locked on the lock tube 17, and hydraulic cylinder 14 maintains static, and after pressure disappeared, last packing element 8, lower rubber cylinder 20 still can be expanded and seal up sleeve pipe with lower piston.

When giving up, drop into steel ball and be landed on the releasing tube 3, suppress again, the shear pin 2 of giving up is cut off, and the releasing tube 3 descending constraints that lose the lock pawl 23 of top connection 1 bottom are carried in the top connection 1, lock pawl 23 withdraws from from the suspension shoulder in the suspended tubes 4, realizes giving up, and top connection 1 above tubing string can propose.

During salvaging, being lowered to fisher and fishing joint 5 tops has internal thread to connect on the back to carry, and deblocking shear pin 19 is broken, down in pipe 15 up LAPs, slips 12 is regained, after last packing element 8, lower rubber cylinder 20 are received, the realization deblocking.

Claims

1, a kind of back-off packer, by top connection (1), the shear pin (2) of giving up, releasing tube (3), suspended tubes (4), fishing joint (5), suspension joint (6), pipe (7) in going up, last packing element (8), last packing element axle (9), cone (10), seat envelope shear pin (11), slips (12), slip sleeve (13), hydraulic cylinder (14), pipe (15) down, lower piston (16), lock tube (17), lock ring (18), deblocking shear pin (19), lower rubber cylinder (20), lower rubber cylinder axle (21), circlip (22) is formed, it is characterized in that: the lock pawl (23) of top connection (1) bottom tangles suspended tubes (4), releasing tube (3) is installed in the top connection (1), suspension joint (6) is installed in suspended tubes (4) bottom, fishing joint (5) is suspended on the suspension joint (6), suspension joint (6) bottom connects with last interior pipe (7) top, manage on (7) in last packing element axle (9) is suspended on, last packing element (8) is sleeved on outside the packing element axle (9), last packing element (8) is under the suspension joint (6), last packing element axle (9) bottom connects with cone (10), cone (10) is connected by seat envelope shear pin (11) with slip sleeve (13), slips (12) is installed in the window place of slip sleeve (13), the conical surface of slips (12) contacts with the conical surface of cone (10), pipe (7) bottom connects with following interior pipe (15) top in going up, manage outside (15) in hydraulic cylinder (14) is sleeved on down, hydraulic cylinder (14) and interior down the pipe between (15) form upper chamber (24) and lower chambers (25), lower piston (16) is installed in lower chambers (26), under the lower piston (16) lock tube (17), lock ring (18) is arranged on the lock tube (17), pipe (15) bottom suit lower rubber cylinder axle (21) down, lower rubber cylinder axle (21) is fixed on down on the interior pipe by deblocking shear pin (19), lower rubber cylinder axle (21) overcoat loads packing element (20), flexible back-up ring (22) in the lower piston (16) has circlip groove (26) on the interior pipe (15) down.

2, back-off packer according to claim 1 is characterized in that: internal thread is arranged at fishing joint (5) top.