CN2687320Y

CN2687320Y - Slips stripping packer

Info

Publication number: CN2687320Y
Application number: CN 200320129563
Authority: CN
Inventors: 尹婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-24
Filing date: 2003-12-24
Publication date: 2005-03-23
Anticipated expiration: 2013-12-24

Abstract

The utility model relates to a slips stripping packer, which mainly solves the problem that the existing packer needs to discharge pollution and a killing well. The inside and the outside of an upper joint (1) respectively pass through a stripping slide sleeve (5) whose lower end is provided with steps (18) and a removing sealing head (2). The lower end connected with the lower end of the removing sealing head (2) is connected with the cylinder sleeve (7) of the transferring force sleeve (13). The lower end of the transferring force sleeve (13) contacts a slips base (14) clamping 4-8 slips (15). 16-18 stripping spring tongues are arranged between the stripping slide sleeve (5) and the cylinder sleeve, and the lower ends of the stripping spring tongues are arranged in the flutes (19) at the upper ends of the step (18) and the center pipe (12). A lock ring base (21) with lock ring (8) connected with a piston (20) is arranged between the center pipe (12) and the cylinder sleeve. The lower end of the piston (20) is provided with a cone piston (10) with 10-12 DEG. A rubber cylinder (16) is arranged between the slips base (14) and a lower joint (17). The utility model is characterized in that the pollution discharge and the killing well are not required.

Description

The slips back-off 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 slips back-off 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.And the packer that uses at present needs blowdown not because of giving up unfreezing mechanism when removing the pump operation, can cause environment pollution like this, also needs kill job simultaneously, working procedure complexity not only, and well killing fluid again can polluted reservoir, and oil reservoir is suffered damage.

The utility model content:

When removing the pump operation, need blowdown and kill-job meeting to cause the deficiency of environment pollution in order to overcome existing packer; the utility model provides a kind of slips back-off packer; this packer cooperates bypass cock to form the tubing string of giving up that open flow not removes pump on machine-pumped oil well; when removing the pump operation, have the characteristics that the blowdown of not needing reaches does not need kill-job, can protect the effect of environment and oil reservoir.

The technical scheme that the utility model adopted is: the slips back-off packer, comprise lower contact and central tube, it is characterized in that: be connected with the lower end sliding sleeve and separate end socket of giving up with the level by give up pin and seat offset nail respectively inside and outside the top connection, separate the cylinder sleeve that the continuous lower end in end socket lower end is connected with the power transmission cover, the slip spider of 4～8 slips in power transmission cover lower end and clamping touches mutually; Give up and be equipped with lower end between sliding sleeve and the cylinder sleeve and place 16～18 lobes between the groove of step and the central tube upper end spring-latch of giving up; Be equipped with between central tube and the cylinder sleeve by the link to each other lock ring seat of ring with lock of piston of unfreezing pin, the lower end of piston is equipped with the lower end and puts 10～12 ° of taper pistons between slips and central tube; Be equipped with the packing element of spacer ring clamping between slip spider and the lower contact.

The beneficial effects of the utility model are: because this packer has giving up that give up sliding sleeve and the spring-latch of giving up constitute to separate sealing mechanism, it is effective to set deblocking, on machine-pumped oil well, cooperate bypass cock to form the tubing string of giving up that open flow not removes pump, make ground not blowdown when removing the pump operation, reach requirement on environmental protection, giving up tubing string can snubbing service, and the protection oil reservoir is not polluted the purpose that reaches the protection oil reservoir simultaneously by well killing fluid; The respective outer side edges of taper piston and lock ring makes the fastening effect firm stable more of slips and sleeve pipe, and slips has only radial motion there is no in sitting the card process to move axially, better guaranteed the effect that sets of packer simultaneously.

Description of drawings:

Fig. 1 is the utility model structure sectional view;

Fig. 2 is the partial enlarged drawing of a portion among Fig. 1.

1-top connection among the figure, 2-separates end socket, the 3-pin of giving up, 4-sets pin, the 5-sliding sleeve of giving up, the 6-spring-latch of giving up, 7-cylinder sleeve, 8-lock ring, 9-unfreezing pin, 10-taper piston, 11-are sat bayonet lock nail, 12-central tube, 13-power transmission cover, 14-slip spider, 15-slips, 16-packing element 16, the 17-lower contact, 18-step, 19-groove, the 20-piston, 21-lock ring seat, 22-spacer ring.

The specific embodiment:

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

As Fig. 1 in conjunction with shown in Figure 2, this slips back-off packer comprises lower contact (1,17) and central tube 12, be connected with the sliding sleeve 5 and separate end socket 2 of giving up of lower end band step 18 inside and outside the top connection 1 respectively by give up pin 3 and seat offset nail 4, separate the cylinder sleeve 7 that the continuous lower end in end socket 2 lower ends is connected with power transmission cover 13, the slip spider 14 that 4～8 slips 15 in 13 lower ends and clamping are overlapped in power transmission touches mutually, and slips 15 is the best with 6 fastening effects in actual the use; Giving up is equipped with lower end and places the spring-latch 6 of giving up between the groove 19 of step 18 and central tube 12 upper ends between sliding sleeve 5 and the cylinder sleeve 7, the spring-latch 6 of giving up can be 14～18 lobes, and The field is a preferred plan with 16 lobes; Be equipped with between central tube 12 and the cylinder sleeve 7 by the link to each other lock ring seat 21 of ring with lock 8 of piston 20 of unfreezing pin 9, lock ring 8 is reverse retaining mechanism, after slips 15 is stretched out promptly by locked, improved the quality that seat card, seat seal, piston 20 lower ends are equipped with 10～12 ° of taper pistons 10 between central tube 12 and cylinder sleeve 7 and the power transmission cover 13, put between slips 15 and central tube 12 the cone lower end of taper piston 10, and cone is optimum efficiency with 11 ° in actual the use, and the fastening effect that makes slips 15 is best; Taper piston 10 links to each other with power transmission cover 13 by setting pin 11, be equipped with the packing element 16 of spacer ring 22 clampings between slip spider 14 and the lower contact 17, packing element 16 is in the bottom of slips 15, it can bear the pressure reduction up to 20MPa from bottom to top, by firm being stuck on the internal surface of sleeve pipe, simultaneously slips 15 has only radial motion there is no in sitting the card process to move axially taper piston 10 at High Pressure Difference effect lower slips 15.

When setting, after tubing string is lowered to desired depth, in oil pipe, pressurize, cut off during at pressure and to set pin 4 greater than 4 ± 0.5MPa, this moment, taper piston 10 promoted slip spider 14 and slips 15 is descending under pressure, force packing element 16 spreadings, increasing diameter adds seals the oil jacket space, set pin 11 when above and cut off when pressure reaches 12MPa, taper piston 10 continues descending release slips 15 and blocks sleeve pipe, cylinder sleeve 7 moves down and causes lock ring 8 places at the same time, and taper piston 10 lockings can't be retreated, and seat card and the work of setting are finished when pressure reaches 20MPa.

The process of giving up, stop pressurizeing more than the 4MPa after pressure drops into a φ 30mm steel ball after finishing the seat card, cut off the pin 3 of giving up, make the sliding sleeve 5 of giving up descending, the spring-latch 6 of giving up leaves the undergauge position that step 18 and groove 19 places enter the sliding sleeve 5 of giving up, the upper lifting pipe post can top connection 1, give up sliding sleeve 5 and the spring-latch 6 of giving up trip out together with the top tubing string, finishes the process of giving up.

Unfreezing deblocking process, be lowered to special-purpose fisher, fisher is caught separate on end socket 2 backs and carried, when upper lifting force remove tubing string after weight greater than 5 ton hours, unfreezing pin 9 is cut off, and tubing string drive this moment is separated end socket 2, cylinder sleeve 7 and lock ring 8 and taper piston 10 can be proposed, and slips 15 is regained under spring action, packing element 16 also will return in the 124mm simultaneously, and the tubing string of giving up is tripped out.

Owing to use this slips back-off packer; there are giving up that give up sliding sleeve 5 and the spring-latch 6 of giving up constitute to separate sealing mechanism; simultaneously slips 15 has only radial motion there is no in setting the fastening process to move axially; it is effective to set deblocking; on machine-pumped oil well, cooperate bypass cock to form the tubing string of giving up that open flow not removes pump; make ground not blowdown when removing the pump operation; reach requirement on environmental protection; giving up tubing string can snubbing service, and the protection oil reservoir is not polluted the purpose that reaches the protection oil reservoir simultaneously by well killing fluid.

Claims

1, a kind of slips back-off packer, comprise lower contact (1,17) and central tube (12), it is characterized in that: be connected with the sliding sleeve of giving up (5) of lower end band step (18) and separate end socket (2) by pin of giving up (3) and seat offset nail (4) respectively inside and outside the top connection (1), separate the cylinder sleeve (7) that the continuous lower end in end socket (2) lower end is connected with power transmission cover (13), touch mutually with the slip spider (14) of 4～8 slips of clamping (15) power transmission cover (13) lower end; Give up and be equipped with lower end between sliding sleeve (5) and the cylinder sleeve (7) and place 16～18 lobes between the groove (19) of step (18) and central tube (12) the upper end spring-latch (6) of giving up; Be equipped with between central tube (12) and the cylinder sleeve (7) by the link to each other lock ring seat (21) of ring with lock (8) of piston (20) of unfreezing pin (9), the lower end of piston (20) is equipped with the lower end and puts 10～12 ° of taper pistons (10) between slips (15) and central tube (12); Be equipped with the packing element (16) of spacer ring (22) clamping between slip spider (14) and the lower contact (17).