CN201321836Y - Back-off packer of operation without open flow of water injection well - Google Patents

Abstract

The utility model relates to a back-off packer of operation without open flow of water injection well, which mainly solves the problem that an existing packer can not be used in operation of a water injection well. The packer is characterized in that the lower portion of an oil pipe centralizer (1) is connected with a tapping pin assembly (2), the lower portion of the tapping pin assembly (2) is connected with a plurality of elastic claws (20), the upper portion of a lower joint (19) is connected with a setting outer sleeve with a step (14) through threads, and the inner of the setting outer sleeve (14) is connected with a lower packing element seat (12), a setting pull-ring with a step (16) is arranged on the lower portion of the setting outer sleeve (14), the inner of the setting pull ring (16) is connected with a setting spring bolt (13) through the threads and then is arranged on the upper portion of the lower joint (19), a setting locking ring (5) whose inner and outer are respectively provided with the steps is matched inside the lower joint (19) in a sliding mode, and the lower portion of the setting locking ring (15) is connected with a locking limit ring (17) through the threads. The back-off packer of operation without open flow of water injection well has the characteristics that machines are sealed, and the whole process of operation and construction of a water injection well has no open flow.

Description

Water injection well is open flow operation back-off packer not

Technical field:

The utility model belongs to oil recovery field, oil field, relates in particular to not open flow operation back-off packer of a kind of water injection well.

Background technology:

Conventional waterflooding tubing string and implement can't be realized Operating Pressure at present, these construction well job execution requirements routinely, need first closing well step-down to treat to construct after the pressure stability before the operation, generally adopt uncovered operation in the operation process, oil-polluted water does not have control and effluxes and cause the bigger pollution of environment, and well liquid does not have control and effluxes and cause the strata pressure of water injection well near wellbore zone to descend, influence construction speed, particularly water injection well moment puts to be pressed in to a certain extent sleeve pipe is caused bigger infringement, and the well of winter construction simultaneously liquid does not have control and effluxes also and can bring potential safety hazard to work production.

The utility model content:

In order to overcome deficiency above-mentioned in the existing technology, the utility model provides not open flow operation back-off packer of a kind of water injection well, and this water injection well not open flow operation back-off packer has mechanical seal, realizes the not characteristics of open flow of water injection well job execution overall process.

The technical solution of the utility model is: a kind of water injection well is open flow operation back-off packer not, comprise tubing centrilizer, the lower rubber cylinder seat, lower contact, the tubing centrilizer bottom connects the tapping pin assembly, tapping pin assembly bottom connects several elastic claws, the be threaded overcoat that sets of step of lower contact top, and setting overcoat inside links to each other with the lower rubber cylinder seat, set the overcoat bottom and be equipped with the draw ring that sets that has step, setting the draw ring internal whorl connects and to set dead bolt and be placed on lower contact top, in the lower contact slides within cooperates, the outer lock ring that sets that step is all arranged, and set lock ring lower thread connection locking spacing ring.

The utlity model has following beneficial effect: owing to take such scheme, by on carry the tapping pin assembly, thereby the positioning step on the tapping pin assembly blocks the cone dead bolt and drives the up extruding slips of cone, thereby realize the grappling of slips, set, deblocking action also by on carry or be lowered to tapping pin and drive and set the overcoat upstream or downstream, thereby the extruding or unclamp packing element and finish, changed packer in the past by fluid pressure set, the problem of deblocking, make when this back-off packer can be realized the water injection well job execution not open flow, do not efflux.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model.

1-tubing centrilizer among the figure, 2-tapping pin assembly, the 3-slideway, 4-sets upright main body, the 5-wiper block, 6-slip spider, 7-slips, 8-cone, 9-seat card spacing ring, 10-central tube, 11-packing element, 12-lower rubber cylinder seat, 13-sets dead bolt, and 14-sets overcoat, 15-sets lock ring, and 16-sets draw ring, and 17-locks spacing ring, the 18-stop collar, 19-lower contact, 20-elastic claw.

The specific embodiment:

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

By shown in Figure 1, a kind of water injection well is open flow operation back-off packer not, comprise tubing centrilizer 1, lower rubber cylinder seat 12, lower contact 19, tubing centrilizer 1 bottom connects tapping pin assembly 2, there is slideway 3 tapping pin assembly 2 outsides, set upright main body 4 downwards successively, wiper block 5, when carrying on the packer or transferring, 5 pairs of packer integral body of wiper block play centralizing function, set upright main body 4 bottoms and are connected with slip spider 6, slip spider 6 bottoms are slips 7, during the seat card, slips 7 is by cone 8 distendings of bottom, and cone 8 is connected with central tube 10, thereby slips 7 is anchored on the sleeve pipe, and seat card spacing ring 9 can prevent slips 7 parectasises and damage; Tapping pin assembly 2 bottoms connect several elastic claws 20, and protrude elastic claw 20 bottoms, can be stuck in to set on the lock ring 15 when it is upspring, and it is up thereby drive; What lower contact 19 tops were threaded step sets overcoat 14, guarantees that the two (14,19) outside is a plane, sets overcoat 14 inside and links to each other with lower rubber cylinder seat 12, and lower rubber cylinder seat 12 tops and packing element 11 are stuck, and limit packing element 11 axial displacements; Set overcoat 14 bottoms be equipped with have a step set draw ring 16, setting draw ring 16 internal whorls connects and to set dead bolt 13 and be placed on lower contact 19 tops, in lower contact 19 slides within cooperate, outer step all arranged set lock ring 15, and set lock ring 15 lower thread and connect locking spacing ring 17, when tapping pin assembly 2 is up, the step that sets lock ring 15 middle inside can block with the elastic claw 20 of tapping pin assembly 2 bottoms, set simultaneously lock ring 15 tops again can with set dead bolt 13 and block, thereby drive sets dead bolt 13 and moves upward, set lock ring 15 bottom outside screw and connect locking spacing ring 17, locking spacing ring 17 outsides are stop collar 18, when tapping pin assembly 2 is up to certain position, stop collar 18 is stuck in lower contact 19 bottoms, plays spacing effect.

During operation, trip out tubing string earlier, with pressurizing frame main body is pressed in the well after with elevator the oil layer switch main body being sitting in well head then, being lowered to tapping pin assembly 2 and water injection string is pressed in the well, can put into production to projected depth down, this instrument is in and does not set and do not sit the card state when normal seperated layer water injection.Carry this instrument to perforated interval top on when closing well operations, transfer tubing string again above 400 millimeters, slideway pin on the tapping pin assembly 2 changes the slideway of giving up over to, tapping pin assembly 2 was pressed the cone dead bolt, the positioning step of carrying oil pipe tapping pin assembly 2 again withstands the cone dead bolt, and it is up to promote cone 8, because the effect of slips cone 8, slips 7 is opened, and is anchored on the grappling process of the instrument of finishing on the internal surface of sleeve pipe.Carry in the continuation, it is up that elastic claw 20 pullings of tapping pin assembly 2 lower ends set lock ring 15, drive sets dead bolt 13, it is up to set draw ring 16 and set overcoat 14, it is up to set overcoat 14 drive lower rubber cylinder seats 12, lower rubber cylinder seat 12 compression packing elements 11 make packing element 11 radial dilatation, the sealing oil sets annular space sets dead bolt 13 simultaneously and snaps in the packing element stopper slot and make packing element 11 not resiliences, and packing element 11 sets to be finished.Carry in the continuation, tapping pin slideway pin proposes to give up slideway 3, gives up and finishes.During deblocking, the lower tubular column butt joint tubing string of giving up, the slideway pin on the tapping pin 2 enters and sets slideway .3, and to promote to set lock ring 15 descending for the dead bolt 13 that sets of tapping pin 2 lower ends, drive sets draw ring 16 and sets overcoat 14 descending, lower rubber cylinder seat 12 resets, and packing element 11 deblockings continue to transfer, tapping pin 2 positioning steps withstand taper locks hypogloeeis row, it is descending to promote slips cone 8, and slips 7 is regained, and continues lower tubular column to putting into production below the perforated interval.

This back-off packer has changed the mode that packer is in the past sat card, set by fluid pressure, adopts mechanical forces to realize sealing, makes under well head band pressure situation, realize water injection well job execution overall process not open flow, do not efflux.

Claims (1)

1, a kind of water injection well is open flow operation back-off packer not, comprise tubing centrilizer (1), lower rubber cylinder seat (12), lower contact (19), it is characterized in that: tubing centrilizer (1) bottom connects tapping pin assembly (2), tapping pin assembly (2) bottom connects several elastic claws (20), what lower contact (19) top was threaded step sets overcoat (14), and setting overcoat (14) inside links to each other with lower rubber cylinder seat (12), set overcoat (14) bottom be equipped with have a step set draw ring (16), setting draw ring (16) internal whorl connects and to set dead bolt (13) and be placed on lower contact (19) top, in lower contact (19) slides within cooperates, outer step all arranged set lock ring (15), and set lock ring (15) lower thread and connect locking spacing ring (17).