CN2755274Y

CN2755274Y - Mechanical repeated fracture packer

Info

Publication number: CN2755274Y
Application number: CN 200420070302
Authority: CN
Inventors: 朱玉军; 李秀美
Original assignee: FUXIN PETROLEUM TOOL WORKS
Current assignee: FUXIN PETROLEUM TOOL WORKS
Priority date: 2004-08-13
Filing date: 2004-08-13
Publication date: 2006-02-01
Anticipated expiration: 2014-08-13

Abstract

The utility model belongs to a packer used for oil fields, which discloses a mechanical repeated fracturing technique of a packer. The utility model is provided with an anchoring device 12, a righting device 14, a locking device 13 and a seat seal guiding device 15. The inner side of an upper joint 1 in a discarding device is hitched with a fishing jaw 3 supported by a spring 2, and the lower end of the fishing jaw 3 is grooved to connected with a fishing head 5 in a screwed connection mode, wherein the upper end of the fishing head 5 is provided with a cam 4 and the outer side of the fishing jaw 3 is hitched with an upper press ring 6. The outer side of a connecting sleeve 8 in a seal device is hitched with a lower press ring 11 with a limit ring groove. Limit caulking rings 10 corresponding to corners are connected with rubber cylinders 9 in a compression joint mode, and the upper end of the rubber cylinders is connected with the upper press ring 6 with a limit ring groove. The connecting sleeve 8 is connected outside an unsealing jaw 16 of grooving screw threads connected with the outer side of a central shaft 7 of an unsealing device in a screwed connection mode. The seat seal load is 120 kN, the pressure difference of work is less than or equal to 70 MPa and the unsealing load is 60 to 80 kN. The utility model is suitable for the work of water blocking, oil extraction, fracturing and acidification for the oil fields and oil wells.

Description

Mechanical type refracturing packer

Affiliated technical field the utility model belongs to petroleum machinery, the mechanical type refracturing packer of particularly a kind of water blockoff, pressure break, acidification technique.

Background technology is present, and the employed mechanical packer in oily vapour field is connected use with tubing string, can not put use aside, and anti-high pressure is indifferent when reusing, and inside has locking device not reuse.

The summary of the invention the purpose of this utility model is to overcome above technical deficiency, provides a kind of and can put aside, reusable mechanical type refracturing packer.

Task of the present utility model is, the inside of mechanical type refracturing packer has anchoring device, erection device, locking device, set guiding device, also comprise and put device aside, sealing device, the deblocking device, the top connection inboard of putting inboard band keyway in the device aside articulates spring-supported bailer grab, the upper end fluting that is threaded of bailer grab lower end fluting is equipped with the fishing head of cam lower end fluting, the outside articulates upper press ring, the adapter sleeve outside articulates the following pressure ring of upper end inboard band limited ring groove in the sealing device, the spacing spacer ring crimping packing element that the turning is relative, the upper end connects the upper press ring of lower end band limited ring groove, the deblocking pawl outside is connected with adapter sleeve in the deblocking device, and the inside thread external recessing is connected with the central axis outside screw.

The utlity model has following characteristics: one, mechanical type refracturing packer inside is put device aside, can put use aside, gives up and can also salvage packer, and a tubing string can be finished and set, puts aside and deblocking; Its two, mechanical type refracturing packer inner sealing device can spacing compression packing element, pressure is crossed senior general's packing element and is weighed wounded when preventing work, improves packing element application life and sealing performance; Its three, there is the deblocking device mechanical type refracturing packer inside, packer is returned to original state during deblocking, and is reusable.

Description of drawings specifies with embodiment below in conjunction with accompanying drawing.

Fig. 1 shows mechanical type refracturing packer construction figure.

Among Fig. 1, the 1-top connection; The 2-spring; The 3-bailer grab; The 4-cam; The 5-fishing head; The 6-upper press ring; The 7-central axis; The 8-adapter sleeve; The 9-packing element; The 10-spacing ring every; Pressure ring under the 11-; The 12-anchoring device; The 13-locking device; The 14-erection device; 15-sets guiding device; 16-deblocking pawl; Nut under the 17-

The specific embodiment is with reference to accompanying drawing 1, top connection 1 inboard of putting inboard band keyway in the device aside of mechanical type refracturing packer articulates the bailer grab 3 that spring 2 supports, the upper end fluting that is threaded of bailer grab 3 lower ends fluting is equipped with the fishing head 5 of cam 4 lower ends fluting, adapter sleeve 8 outsides articulate the following pressure ring 11 of upper end inboard band limited ring groove in the sealing device, the spacing spacer ring 10 crimping packing elements 9 that the turning is relative, the upper end connects the upper press ring 8 of lower end band limited ring groove, deblocking pawl 16 outsides are connected with adapter sleeve 8 in the deblocking device, the inside thread external recessing is connected with central axis 7 outside screw, put aside and connect central axis 7 under the device, under connect down nut 17, articulate the adapter sleeve 8 that connects the deblocking pawl, articulate and set guiding device 15, erection device 14, locking device 13, anchoring device 12, sealing device, upper lifting pipe post when setting, following nut articulates adapter sleeve, the dextrorotation tubing string, set guiding device 15 and open, rely on the friction of erection device 14 and internal surface of sleeve pipe, anchoring device 12 grappling sleeve pipes, sealing device is finished sealing, locking device 13 is finished locking simultaneously, and the screw thread of deblocking pawl 16 flutings is threaded with central axis 7, and upper press ring 6 is pressed letter cam 4, set and finish, when putting aside, dextrorotation tubing string again, bailer grab 3 breaks away from fishing head 5, finish and put aside, during deblocking, transfer tubing string, the screw thread of bailer grab 3 lower ends fluting is connected with fishing head 5, when upper lifting force reaches the deblocking pulling force, deblocking pawl 16 breaks away from centre wheel 7 screw threads, and packer is returned to ortho states, finishes deblocking.

The technical performance parameter

Seating sealing load 120kN;

Pressure reduction≤70MPa in the work;

Deblocking load 60-80kN

Mechanical type separate stratum fracfturing packer is applicable to the oil recovery of oilfield water blockoff, pressure break, acidizing treatment.

Claims

1. a mechanical type refracturing packer has anchoring device (12), erection device (14), locking device (13), sets guiding device (15), it is characterized in that also comprising putting device, sealing device, deblocking device aside:

Put top connection in the device (1) inboard aside and articulate the bailer grab (3) that spring (2) supports, the fishing head (5) of cam (4) is housed on bailer grab (3) lower end fluting is threaded, the outside articulates upper press ring (6);

Adapter sleeve in the sealing device (8) outside articulates the following pressure ring (11) that has limited ring groove, spacing spacer ring (10) the crimping packing element (9) that the turning is relative, and the upper end connects the upper press ring (8) that has limited ring groove;

The central axis of deblocking device (7) outside screw connects the deblocking pawl (16) of fluting screw thread, external adapter sleeve (8).