CN2782919Y

CN2782919Y - Packer

Info

Publication number: CN2782919Y
Application number: CN 200520090280
Authority: CN
Inventors: 王柏林
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-11
Filing date: 2005-04-11
Publication date: 2006-05-24
Anticipated expiration: 2015-04-11

Abstract

The utility model relates to a packer which is composed of an upper joint 1, a central tube 2, a hydraulic anchor 3, an inner tube 4, a sealing piece 5, a conical body 6, a through hole 7, an outer tube 8, a slip 9, a garter spring 10, a centralizing device 11, a track body 12, a pin bolt 13, a lower joint 14 and a pressure relief valve 15. The utility model has the structure that the hydraulic anchor is sheathed on the central tube, the sealing element and an outer tube are sheathed on the inner tube, a passage is positioned between the sealing element and the inner tube, and the lower part of the passage is provided with through hole; the conical body is sheathed on the lower part of the sealing element, the slip, the centralizer and the track body are orderly sheathed on the outer tube, and the pin bolt is connected with the track body and the lower joint. The utility model can bear a lower pressure difference, the midway setting phenomenon is difficult to happen, and the speed of construction is quick; the utility model has high tensile strength and can bear high pressure; The pressure can be drained by lifting a pipe column when the utility model is unsealed. The utility model has the advantages of reasonable design and simple operation, and is suitable for being popularized and applied at a site.

Description

A kind of packer

Technical field:

The utility model relates to the downhole tool that uses on a kind of oilfield, particularly a kind of packer.

Background technology:

In oil extraction at present and the workover technology, oil well delamination oil recovery, water blockoff, water filling, acidifying, pressure break, test machinery that construction operation leakage uses and set the formula packer and mainly adopt the Y211 packer.Y211 is the mono-layer tube structure, on put to put and set, one-way slip grappling form, it can not bear very high following pressure reduction; Can't the venting packer fluid when deblocking, the deblocking load is high, and Ka Jing causes the accident easily, and also can be caused environment pollution by the liquid that packer is taken out of; The frequent appearance phenomenon that sets midway or do not set after the projected depth in construction, the construction success rate is lower.

Technical scheme

The purpose of this utility model is to provide a kind of packer.It can bear down pressure reduction; Be difficult for setting, speed of application is fast midway; Tensile strength height, pressure-bearing height, easy deblocking.

The utility model purpose is to realize like this, it is by top connection (1), central tube (2), hydraulic anchor (3), interior pipe (4), seal (5), cone (6), through hole (7), outer tube (8) slips (9), garter spring (10), centralizer (11), track body (12), pin (13), lower contact (14), relief valve (15) is formed, top connection (1) and central tube (2), interior pipe (4), lower contact (14) connects successively, on central tube (2), be with hydraulic anchor (3), on interior pipe (4), be with relief valve (15), seal (5), outer tube (8), between seal (5) and interior pipe (8), passage is arranged, through hole (7) is arranged at the bottom, cone (6) is enclosed within seal (5) bottom, on outer tube (8), be with slips (9) successively, centralizer (11), track body (12), garter spring (10) is arranged on slips (9), and pin (13) connects track body (12), lower contact (14).

During work, the effect of hydraulic anchor is when the following pressure reduction of packer increases, and the anchor fluke of hydraulic anchor is opened and bitten sleeve pipe and make packer motionless; Following pressure reduction is high more, and the anchor fluke of hydraulic anchor stings that tight power is big more, and packer is firm more, makes packer can bear higher following pressure reduction; Two-layer pipe, relief hole of design between hydraulic anchor and the packing element.The liquid that upper lifting pipe post relief valve can be opened packer top when the packer deblocking releases by the circular passage between relief valve and the bimetallic tube, alleviates the deblocking load of packer, makes the easy deblocking of packer; Adopt rotation to set mode, avoided packer to set problem midway.

The utility model is with hydraulic anchor owing to having adopted on central tube, be with seal, outer tube on inner pipe, between seal and interior pipe, passage is arranged, through hole is arranged at the bottom, cone is enclosed within the seal bottom, be with slips, centralizer, track body on outer tube successively, pin connects track body, lower contact.It can bear down pressure reduction; Be difficult for setting, speed of application is fast midway; Tensile strength height, pressure-bearing height, upper lifting pipe post pressure release during deblocking, it is reasonable in design, and is simple to operate, is well suited for field popularization application.

Description of drawings

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

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment

As shown in the figure, the utility model is by top connection 1, central tube 2, hydraulic anchor 3, interior pipe 4, seal 5, cone 6, through hole 7, outer tube 8, slips 9, garter spring 10, centralizer 11, track body 12, pin 13, lower contact 14, relief valve 15 is formed, top connection 1 and central tube 2, interior pipe 4, lower contact 14 connects successively, on central tube 2, be with hydraulic anchor 3, on interior pipe 4, be with relief valve 15, seal 5, outer tube 8, at

seal

5 and 8 of interior pipes passage is arranged, through hole 7 is arranged at the bottom, cone 6 is enclosed within seal 5 bottoms, on outer tube 8, be with slips 9 successively, centralizer 11, track body 12, garter spring 10 is arranged on slips 9, pin 13 connects track body 12, lower contact 14, commutation track body (12) and four commutation pins (13) of having four spirals to link up with.

Claims

1, a kind of packer, it is by top connection (1), central tube (2), hydraulic anchor (3), interior pipe (4), seal (5), cone (6), through hole (7), outer tube (8) slips (9), garter spring (10), centralizer (11), track body (12), pin (13), lower contact (14), relief valve (15) is formed, it is characterized in that: top connection (1) and central tube (2), interior pipe (4), lower contact (14) connects successively, on central tube (2), be with hydraulic anchor (3), on interior pipe (4), be with relief valve (15), seal (5), outer tube (8), between seal (5) and interior pipe (8), passage is arranged, through hole (7) is arranged at the bottom, cone (6) is enclosed within seal (5) bottom, on outer tube (8), be with slips (9) successively, centralizer (11), track body (12), garter spring (10) is arranged on slips (9), and pin (13) connects track body (12), lower contact (14).

2, a kind of packer according to claim 1 is characterized in that: commutation track body (12) and four commutation pins (13) that four spiral hooks are arranged.