CN201221334Y

CN201221334Y - Expanding type water injection packer capable of de-sealing

Info

Publication number: CN201221334Y
Application number: CNU2008200235632U
Authority: CN
Inventors: 高兴权; 曲绍琨; 张丁涌
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-04
Filing date: 2008-06-04
Publication date: 2009-04-15
Anticipated expiration: 2018-06-04

Abstract

The utility model relates to an unblocking expandable water injection packer, which consists of an upper joint, a rubber cylinder, a central pipe, a lower rubber cylinder joint and a lower joint. The rubber cylinder is sleeved outside the central pipe; the lower part of the central pipe is linked with the lower joint; the lower rubber cylinder joint is linked with the lower part of the rubber cylinder; the rubber cylinder joint is sleeved outside the lower joint, and consists of a linkage joint, an upper rubber cylinder joint and a linkage sleeve; wherein, the upper rubber cylinder joint is linked with the upper part of the rubber cylinder; the linkage joint is linked with the upper part of the central pipe; the upper part of the linkage joint is linked with the upper joint; the large threads at the lower part of the upper joint is linked with the upper part of the linkage sleeve; the linkage sleeve is sleeved outside the upper rubber cylinder joint; a linkage hole is arranged on the upper rubber cylinder joint; a linkage groove is jacketed in the linkage sleeve; and a linkage hole is arranged on the central pipe. The inside of the central pipe is linked with the sleeve through a pipe lifting column; then the pressure is balanced; and the unblocking performance can be realized; no liquid is required to be injected into the sleeve; the unblocking is convenient; the cost is low; the linkage hole and the linkage groove can realize the balance between the internal pressure and the external pressure in the underground mining process; no packing can occur in the underground mining process; and the packer is prevented from being damaged in the underground mining process.

Description

But deblocking expanding water injection packer

Technical field:

The utility model is the packer that separated-zone water infection oil field is used, but is a kind of deblocking expanding water injection packer.

Background technology:

The expanding water injection packer that oil-field flooding is used is that packing element expands outwardly when the packing element internal pressure is higher than the packing element external pressure, realizes the purpose of sealing oil casing annular space.In the time will in well, tripping out the expanding water injection packer, need the packing element internal pressure to be equal to or less than the packing element external pressure, packing element is shunk, finish deblocking.But because ball-and-seat is arranged at the water injection string bottom, if in sleeve pipe, do not inject fluid, just can not realize that the packing element internal pressure is equal to or less than the packing element external pressure, therefore, existing expanding water injection packer deblocking difficulty, carry water injection string during operation firmly and cause packing element to damage, can not reuse, can not finish sleeve pipe and look for and Lou wait construction operation.Because ball-and-seat is arranged at the water injection string bottom, the water injection pipe internal pressure is higher than casing pressure when going into the well at a high speed, therefore, existing expanding water injection packer also appears in the process of going into the well the problem of seat envelope midway, cause that packer damages, cause operation unsuccessful, or the water injection well life-span is short.

Summary of the invention:

The purpose of this utility model provides a kind ofly carries the tubing string deblocking, but the deblocking expanding water injection packer of seat envelope midway do not occur.

The purpose of this utility model is achieved in that by top connection, packing element, central tube, the lower rubber cylinder joint, lower contact is formed, packing element is sleeved on outside the central tube, the central tube bottom connects with lower contact, the lower rubber cylinder joint is connected in the packing element bottom, the lower rubber cylinder fitting sleeve is contained in outside the lower contact, also by UNICOM's joint, gluing socket joint head, UNICOM's cover is formed, gluing socket joint head is connected in packing element top, UNICOM's joint is connected in central tube top, and UNICOM joint top connects with top connection, and the bottom major thread of top connection overlaps top with UNICOM and connects, UNICOM is sleeved on outside the gluing socket joint head, on the gluing socket joint head linked hole is arranged, UNICOM is with UNICOM's groove, and linked hole is arranged on the central tube.

Between gluing socket joint head and the UNICOM's joint piston is installed, piston connects with gluing socket joint head, on UNICOM's joint linked hole is arranged, and linked hole is under piston.

The beneficial effects of the utility model are: carry tubing string and make in the central tube and sleeve pipe UNICOM, pressure balance after the UNICOM, realize deblocking, do not need in sleeve pipe, to inject fluid, deblocking is convenient, and expense is low, internal and external pressure balance when UNICOM's hole slot can be realized going into the well, seat envelope midway can not occur, can prevent that packer is damaged in the process of going into the well.

Description of drawings:

Accompanying drawing is a structure assembling drawing of the present utility model.

The specific embodiment:

Form by top connection 1, packing element 6, central tube 7, lower rubber cylinder joint 8, lower contact 9, UNICOM's joint 4, gluing socket joint head 5, piston 3, UNICOM's cover 2.Packing element 6 is sleeved on outside the central tube 7, central tube 7 bottoms connect with lower contact 9, lower rubber cylinder joint 8 is connected in packing element 6 bottoms, lower rubber cylinder joint 8 is sleeved on outside the lower contact 9, gluing socket joint head 5 is connected in packing element 6 tops, UNICOM's joint 4 is connected in central tube 7 tops, UNICOM's joint 4 tops connect with top connection 1, the bottom major thread and the UNICOM of top connection 1 overlaps 2 tops and connects, UNICOM's cover 2 is sleeved on outside the gluing socket joint head 5, on the gluing socket joint head 5 linked hole 11 is arranged, UNICOM's cover 2 has UNICOM's groove 12, and linked hole 13 is arranged on the central tube 7.Piston 3 is installed between gluing socket joint head 5 and the UNICOM's joint 4, and piston 3 connects with gluing socket joint head 5, and linked hole 10 is arranged on UNICOM's joint 4, and linked hole 10 is under piston 3.

When going into the well, gluing socket joint head 5, packing element 6, lower rubber cylinder joint 8 are in initial point down, this moment linked hole 11 and UNICOM's groove 12 alignment UNICOMs, high pressure in the central tube 7 can be through the slotted eye on the central tube 7 through packing element 6 inwalls and linked hole 11, UNICOM's groove 12 and sleeve pipe UNICOM, make central tube 7 and casing pressure balance, seat envelope midway can not occur, can prevent that packer is damaged in the process of going into the well.

During water filling, hydraulic pressure enters through linked hole 10, linked hole 13, promotes the upwards walking of gluing socket joint head, packing element 6, lower rubber cylinder joint, make linked hole 11 and 12 dislocation of UNICOM's groove, closing passage gradually, the central tube internal pressure is higher than casing pressure, packing element 6 expansions realize the seat envelope.

During deblocking, the upper lifting pipe post, gluing socket joint head 5, packing element 6, lower rubber cylinder joint 8 slide into down initial point once more, this moment linked hole 11 and UNICOM's groove 12 alignment UNICOMs, high pressure in the central tube 7 can be through the slotted eye on the central tube 7 through packing element 6 inwalls and linked hole 11, UNICOM's groove 12 and sleeve pipe UNICOM, make central tube 7 and casing pressure balance, packing element 6 is regained deblocking.

Claims

1, but a kind of deblocking expanding water injection packer, by top connection (1), packing element (6), central tube (7), lower rubber cylinder joint (8), lower contact (9) is formed, packing element (6) is sleeved on outside the central tube (7), central tube (7) bottom connects with lower contact (9), lower rubber cylinder joint (8) is connected in packing element (6) bottom, lower rubber cylinder joint (8) is sleeved on outside the lower contact (9), it is characterized in that: also by UNICOM's joint (4), gluing socket joint head (5), UNICOM's cover (2) is formed, gluing socket joint head (5) is connected in packing element (6) top, UNICOM's joint (4) is connected in central tube (7) top, UNICOM's joint (4) top connects with top connection (1), the bottom major thread of top connection (1) overlaps (2) top with UNICOM and connects, UNICOM's cover (2) is sleeved on outside the gluing socket joint head (5), linked hole (11) is arranged on the gluing socket joint head (5), UNICOM's cover (2) has UNICOM's groove (12), and linked hole (13) is arranged on the central tube (7).

But 2, deblocking expanding water injection packer according to claim 1, it is characterized in that: between gluing socket joint head (5) and the UNICOM's joint (4) piston (3) is installed, piston (3) connects with gluing socket joint head (5), linked hole (10) is arranged on UNICOM's joint (4), and linked hole (10) is under piston (3).