CN201228535Y

CN201228535Y - Mechanism for removing seal for packer

Info

Publication number: CN201228535Y
Application number: CNU200820025911XU
Authority: CN
Inventors: 周广军; 刘全国; 田冰
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-14
Filing date: 2008-07-14
Publication date: 2009-04-29
Anticipated expiration: 2018-07-14

Abstract

The utility model provides a packer-releasing mechanism. A rubber barrel is sleeved outside a liner tube. The rubber barrel is arranged on a rubber barrel holder. A locking sleeve is connected with the lower part of the rubber barrel holder. A piston is connected with the lower part of the locking sleeve. A locking piece cover is connected with the lower part of the liner tube. The lower part of the locking piece cover is inserted into a locking ring seat. The locking piece sleeve and the locking ring seat are integrally connected via a locking piece. The inner wall of the locking piece is in contact with the outer wall of the larger-diameter part of an inner tube. The inner tube is placed inside the locking ring seat and then is integrated with the locking ring seat via a releasing pin. A locking ring is sleeved on the locking ring seat. A locking ring ridge is arranged inside the locking sleeve. The inner tube is compressed and the rubber barrel is sealed, and the rubber barrel doesn't reset after the pressure is removed. During the release operation, the inner tube is placed downward, the releasing pin is pressed and broken, the inner tube moves downwards, and the rubber barrel returns to the original shape, so that the packer is released completely. Therefore, the packer-releasing mechanism achieves the effect of step-by-step release; if a packer at the lower part is stuck, the packer above the stuck-point is released firstly and then the stuck packer at the lower part is treated, thereby reducing the difficulty in lifting the water-injection string and reducing the operation and well-repairing cost. The packer-releasing mechanism has significant economic benefit.

Description

A kind of packer is separated sealing mechanism

One, technical field

The utility model is the downhole tool of used for water injection wells in oil fields, is that a kind of packer is separated sealing mechanism.

Two, background technology

In separate water injection well, under multistage water injection packer is arranged, multiple-string packer is wanted deblocking simultaneously when playing water injection pipe, this is by the structures shape of present packer, when one-level packer wherein for a certain reason can not deblocking, will block tubing string, cause the well operational difficulty, increase the operation workover cost, even can cause the well subscription rate, produce heavy economic losses.

Three, summary of the invention

The purpose of this utility model is that a kind of packer of design is separated sealing mechanism, and when making the water injection well that adopts multiple-string packer play water injection pipe, the multiple-string packer gradually deblocking makes the smooth deblocking of separate layer water injection string, avoids the card tubing string.

The purpose of this utility model is achieved in that by packing element, bushing pipe, glue tube base, interior pipe, the lock dog cover, lock dog, the deblocking pin, lock ring, the lock ring seat, lock tube, piston is formed, packing element is enclosed within outside the bushing pipe, glue tube base is on glue tube base, the glue tube base bottom connects with lock tube, the lock tube bottom connects with piston, the bushing pipe bottom connects with the lock dog cover, lock dog cover bottom is stretched in the lock ring seat, lock dog is connected into one with lock dog lock set ring seat, the lock dog inwall contacts with interior pipe large-diameter portion outer wall, interior pipe is packed into, and the lock ring seat is interior to be connected into one by the deblocking pin, and lock ring is sleeved on the lock ring seat, and the lock ring tooth is arranged in the lock tube.

The beneficial effects of the utility model are: pipe can make this packer deblocking in transferring, therefore can one-level one-level deblocking, when one-level packer card is arranged at the bottom, handle lower packer again after packer deblocking on the stuck point can being proposed, reduce the difficulty of carrying water injection pipe, reduce the operation workover cost, have remarkable economic efficiency.

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 packing element 1, bushing pipe 2, glue tube base 3, interior pipe 4, lock dog cover 5, lock dog 6, deblocking pin 7, lock ring 8, lock ring seat 9, lock tube 10, piston 11 is formed, packing element 1 is enclosed within outside the

bushing pipe

2,1 of packing element is on glue tube base 3, glue tube base 3 bottoms connect with lock tube 10, lock tube 10 bottoms connect with piston 11, bushing pipe 2 bottoms connect with lock dog cover 5, lock dog overlaps 5 bottoms and stretches in the lock ring seat 9, lock dog 6 overlaps 5 lock ring seats 9 with lock dog and is connected into one, lock dog 6 inwalls contact with interior pipe 4 large-diameter portion outer walls, in pipe 4 pack into and be connected into one by deblocking pin 7 in the lock ring seat 9, lock ring 8 is sleeved on the lock ring seat 9, and the lock ring tooth is arranged in the lock tube 10.

Pipe 4 is suppressed in before the water filling, glue tube base 3, lock tube 10, piston 11 are up, 1 envelope of compression packing element, there is the lock ring tooth to be suspended on the lock ring 8 in the lock tube 10, it is locked together, and packing element can not regained after pressure disappeared, and packer is in an envelope state, between bushing pipe 2 and the interior pipe 4 the well-flushing passage is arranged, water injection well can well-flushing.During operation well workover deblocking, pipe 4 in transferring, packing element 1 is supported on the sleeve pipe, tubing string weight breaks deblocking pin 7, in pipe 4 descending, the reduced diameter section of interior pipe 4 arrives lock dog 6 places, lock dog 6 discharges lock ring seat 9, lock ring 8, lock ring seat 9, lock tube 10, piston 11 can be descending, and packing element 1 restores to the original state and finishes first order packer deblocking.The same operation method finish second and third, level Four packer deblocking.

Claims

1, a kind of packer is separated sealing mechanism, by packing element (1), bushing pipe (2), glue tube base (3), interior pipe (4), lock dog cover (5), lock dog (6), deblocking pin (7), lock ring (8), lock ring seat (9), lock tube (10), piston (11) is formed, it is characterized in that: packing element (1) is enclosed within outside the bushing pipe (2), packing element (1) seat is on glue tube base (3), glue tube base (3) bottom connects with lock tube (10), lock tube (10) bottom connects with piston (11), bushing pipe (2) bottom connects with lock dog cover (5), lock dog cover (5) bottom is stretched in the lock ring seat (9), lock dog (6) is connected into one with lock dog cover (5) lock ring seat (9), lock dog (6) inwall contacts with interior pipe (4) large-diameter portion outer wall, interior pipe (4) is packed into, and lock ring seat (9) is interior to be connected into one by deblocking pin (7), lock ring (8) is sleeved on the lock ring seat (9), and lock tube has the lock ring tooth in (10).