CN2685552Y

CN2685552Y - Static hydraulic washable well packer

Info

Publication number: CN2685552Y
Application number: CN 200320124739
Authority: CN
Inventors: 李树菊; 吴海丰; 张惠; 李法成; 李世宏
Original assignee: Daqing Petroleum Administration Bureau
Current assignee: Daqing Petroleum Administration Bureau
Priority date: 2003-12-01
Filing date: 2003-12-01
Publication date: 2005-03-16
Anticipated expiration: 2013-12-01

Abstract

The utility model relates to a static hydraulic cleanable well packer, which is used for solving the problems that the existing packer needs high pressure for seat packing, the time and the labor can be saved, the work efficiency is low, and the producing cost is high. The utility model is characterized in that the inside of an upper joint (1) is provided with a groove (6); the inside of the groove (6) is provided with three to six pressing columns (3) and a pressing spring (2); a well cleaning piston is arranged under the pressing columns (3) between an upper connecting sleeve (5) and a central tube (4); a seat packing piston (16) and a fastening sleeve (15) with a step (14) are sequentially arranged between a lower connecting sleeve (17) and the central tube (4); a depacking ring (13) fixed on the central tube (4) by a depacking pin (12), a fastening ring (11), and the valve body (10) with a valve (9) and a valve spring (8) are sequentially arranged between the fastening sleeve (15) and the central tube (4). The utility model has the characteristics of the low seat packing pressure, time saving, labor saving, the high work efficiency, and the low producing cost.

Description

Hydrostatic washing well packer

Technical field:

The utility model relates to the used packer of oil field oil production engineering seperated layer water injection field of tool, belongs to a kind of hydrostatic washing well packer.

Background technology:

In the oil production engineering in oil field, often use packer, packer is exactly when seperated layer water injection multiple zone to be divided into some intervals, and the instrument of oil reservoir water absorption difference is regulated in oil reservoir control water filling.The kind of packer is a lot, the piston shutoff well-flushing channels result of the hydrostatic washing well packer that uses is poor at present, it is little to the lock sleeve compression pressure to inject liquid, can not make packer reach the packing effect, must make packer setting by impressed pressure, working procedure complexity and labor strength are big, waste time and energy, inefficiency, the cost of production height.

The utility model content:

Need in order to overcome existing packer that high pressure sets, wastes time and energy, inefficiency and the high deficiency of cost of production, the utility model provides a kind of hydrostatic washing well packer, has the characteristics that pressure is low, time saving and energy saving and the high efficiency cost of production is low that set.

The technical scheme that the utility model adopted is: a kind of hydrostatic washing well packer, last lower contact and central tube, be equipped with central tube inside and outside the last lower contact respectively and go up lower joint sleeve, have groove in the top connection, groove is built-in with 3～6 compression legs and stage clip, be equipped with the well-flushing piston below the compression leg between upper joint sleeve and the central tube, be equipped with successively between lower joint sleeve and the central tube and set piston and lock sleeve with the level, be equipped with successively between lock sleeve and the central tube by the deblocking dowel fixes and on central tube, separate seal ring, retaining ring and band valve, the valve body of valve spring.

The beneficial effects of the utility model are: this packer is owing to adopted and had groove in the top connection, and groove is built-in with 3 compression legs and stage clip, is equipped with the well-flushing piston below the compression leg between upper joint sleeve and the central tube, can better solve the secondary seal of piston; Be equipped with successively between lower joint sleeve and the central tube and set piston and lock sleeve with the level, step makes the area up and down of lock sleeve area difference occur, push away setting force under promoting to have increased when packing element sets setting piston, form and move upward a kind of making a concerted effort, compression packer sets packing element; Be equipped with successively between lock sleeve and the central tube by the valve body of separating seal ring, retaining ring and band valve, valve spring of deblocking dowel fixes on central tube, liquid, gas in the movable chamber are discharged by unidirectional valve, reach the effect that packer discharges that do not influence, it is low to set pressure, time saving and energy saving, high efficiency.

Description of drawings:

Fig. 1 is the utility model structure sectional view.

1-top connection among Fig. 1,2-stage clip, 3-compression leg, 4-central tube, 5-upper joint sleeve, 6-groove, the 7-plug, 8-valve spring, 9-valve, 10-valve body, 11-retaining ring, 12-deblocking pin, 13-separates seal ring, the 14-step, and the 15-lock sleeve, 16-sets piston, 17-lower joint sleeve, 18-lower contact.

The specific embodiment:

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

As shown in 1 figure, a kind of hydrostatic washing well packer, last lower contact (1,18) and central tube 4, last lower contact (1,18) be equipped with central tube 4 inside and outside respectively and go up lower joint sleeve (5,17), have groove in the top connection 1, groove 6 is built-in with 3～6 compression legs 3 and stage clip 2, be equipped with well-flushing piston 19 below the compression leg 3 between upper joint sleeve 5 and the central tube 4, stage clip 2 produces pressure by 3 pairs of well-flushing pistons of compression leg 19, can better guarantee the sealing of 19 pairs of well-flushing passages of well-flushing piston; Be equipped with the lock sleeve 15 that sets piston 16 and band step 14 between lower joint sleeve 17 and the central tube 4 successively, step 14 makes the area up and down of lock sleeve 15 area difference occur, push away setting force under promoting to have increased when packing elements set setting piston 16, form and move upward a kind of making a concerted effort, compression packer sets packing element, sets effective; Be equipped with successively between lock sleeve 15 and the central tube 4 by deblocking pin 12 and be fixed on the valve body 10 of separating seal ring 13, retaining ring 11 and band valve 9, valve spring 8 on the central tube 4, liquid, gas in the movable chamber are discharged by unidirectional valve 8, reach the effect that packer discharges that do not influence, be equipped with plug 7 on the valve spring 8, play the effect of shutoff valve spring 8.

In actual use, after injecting the down-hole completion tubular column, do not need to carry out separately the release process of packer, but can directly connect the ground injection device, normally inject, liquid enters respectively simultaneously through two holes up and down of central tube 4, the top that last hole enters well-flushing piston 19 makes well-flushing piston 19 descending, closes the well-flushing passage, and following hole enters the bottom that sets piston 16, make that to set piston 16 up promotion lock sleeves 15 also up, and lock sleeve 15 up and down between form a ring surface product moment, can increase thrust down, form and move upward a kind of making a concerted effort, the compression packer packing element makes packer in running order.

When the injection well needs well-flushing, change the injection flow process on ground, inject flushing fluid by the ring set space, reach the packing element top of packer, because packing element is in compressive state, the flushing fluid of injection can only enter in the well-flushing through hole of upper joint sleeve of packer, and it is up to promote well-flushing piston 16, open the well-flushing passage, finish the well-flushing function.

Owing to use this hydrostatic washing well packer, it is low, time saving and energy saving to set pressure, high efficiency.

Claims

1, a kind of hydrostatic washing well packer, comprise lower contact (1,18) and central tube (4), last lower contact (1,18) be equipped with central tube (4) inside and outside respectively and go up lower joint sleeve (5,17), it is characterized in that: hydrostatic washing well packer is by having groove (6) in the top connection (1), groove (6) is built-in with 3～6 compression legs (3) and stage clip (2), be equipped with well-flushing piston (19) below the compression leg (3) between upper joint sleeve (5) and the central tube (4), be equipped with the lock sleeve (15) that sets piston (16) and band step (14) between lower joint sleeve (17) and the central tube (4) successively, be equipped with successively between lock sleeve (15) and the central tube (4) to be fixed on and separate seal ring (13) on the central tube (4) by deblocking pin (12), retaining ring (11) and band valve (9), the valve body (10) of valve spring (8) constitutes.