CN200971766Y

CN200971766Y - Flushing packer

Info

Publication number: CN200971766Y
Application number: CN 200620133317
Authority: CN
Inventors: 杨东城
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-02
Filing date: 2006-10-02
Publication date: 2007-11-07
Anticipated expiration: 2016-10-02

Abstract

The utility model discloses a cleanable wells packer, which relates to a watering packer for oil extraction in oil field. The compression type packer has the advantages of an expansion type seal seat with the capability of repeated setting and unsetting, and good sealing performance of the compression type packer. The utility model is characterized in that the packer is provided with a plurality of multiple orders of hydraulic pressure cylinders, thus the differential pressure of the setting is small, and the utility model is further provided with a set of hydraulic lock mechanism which can be repeated locked and unlocked, therefore solves the problem of unreliable sealing of the prior expansion type packer and prevents the disadvantage of unreliable unsetting of the prior expansion type packer.

Description

A kind of washing well packer

Technical field

The utility model belongs to the used water injection packer in oil recovery field, oil field, especially a kind of washing well compression packer.

Background technology

The washing well packer of oil field use at present is divided into two kinds, a kind of is inflatable packer, the advantage of this packer is that deblocking is easy, shortcoming is when each interval water absorbing properties differs greatly, the relatively poor layer sealing that absorb water is bad, another kind is the washing well compression packer, this kind packer sealing performance is good, but on carry could deblocking, carry on sometimes load surpass 40 tons can not deblocking with upper packer, particularly at interval more for a long time, at this moment the load that surpasses common working rig, overhaul on the needs, a workover cost is more than 200,000 yuan, annual each oil field all has tens mouthfuls of intact wells of such sleeve pipe need go up " overhaul ", brings very big economic loss to the oil field.

The utility model content:

In order to overcome the deficiency of existing water injection packer, the utility model provides a kind of washing well compression packer, this kind compression packer utilizes multistage hydraulic cylinder to realize packer set, seat envelope pressure reduction is little, can realize seat envelope, deblocking repeatedly in the down-hole, need only anti-flushing well during deblocking, lock piston returns, lock ball falls, but just deblocking of packer.

The technical scheme that the utility model is taked is: this water injection packer, comprise top connection, lower contact, outer tube, central tube, packing element, multi-level piston cylinder sleeve, multi-level piston, lock piston, lock ball, pressure ring, seat offset nail, shelves rings, top connection and the central tube that has a plurality of flowing holes and the outer tube that has a plurality of flowing holes and lockhole are respectively to be threaded, and the space between central tube and the outer tube is separated into 5 piston rods by the multi-level piston cylinder sleeve, piston-cylinder is threaded with central tube respectively, first to third level piston-cylinder be convex, between these 5 piston rods, the multi-level piston that has sealed packing is arranged, middle three grades of pistons are spill, first order piston is the ⊥ font, mobilizable lock ball is arranged thereon, the lock piston that has shoulder is arranged between first order piston and the central tube, multi-level piston is at least by forming more than two, the first order has the part gap to the mating part of fourth stage piston and outer tube, and the first order to the projection of fourth stage piston is non-level and smooth end face.

The beneficial effect that the utlity model has is: owing to take such scheme, this packer promptly has the envelope of seat repeatedly, the deblocking of inflatable packer, need not take to carry deblocking, the advantage that has the compression packer good seal performance again, and can be very little at following envelope of the more situation of hydraulic cylinder number pressure reduction.

Description of drawings:

Accompanying drawing is the utility model structure diagram.

1-top connection among the figure, 2-lower contact, 3-outer tube, 4-central tube, the 5-packing element, 6-first order piston, 7-second level piston, 8-third level piston, 9-fourth stage piston, 10-level V piston, 11-seat offset nail, 12-lock piston, the 13-lock ball, 14-lockhole, 15-pressure ring, 16-shelves ring, 17-central tube flowing hole, 18-central tube flowing hole, 19-central tube flowing hole, 20-central tube flowing hole, 21-central tube flowing hole, 22-central tube flowing hole, 23-fourth stage piston-cylinder, 24-third level piston-cylinder, 25-second level piston-cylinder, 26-first order piston-cylinder, 27-outer tube flowing hole, 28-outer tube flowing hole, 29-outer tube flowing hole, 30-outer tube flowing hole, the 31-pore channel, 32-pore channel, 33-pore channel, the 34-pore channel, the non-level and smooth end face of 35-, the non-level and smooth end face of 36-, the non-level and smooth end face of 37-, the non-level and smooth end face of 38-, 39-cavity, the 40-cavity, 41-cavity, 42-cavity, the non-level and smooth end face of 43-, 44-lock piston shoulder, 45-cavity.

The specific embodiment:

Below in conjunction with accompanying drawing will the utility model is described in further detail:

Shown in figure, this water injection packer comprises top connection 1, lower contact 2, outer tube 3, central tube 4, packing element 5, multi-level

piston cylinder sleeve

23,24,25,26,

piston

10,9,8,7,6, lock piston 12, lock ball 13, pressure ring 15, seat offset nail 11, shelves ring 16 formations such as grade.

The top connection 1 of described washing well water injection packer with have flowing hole 17,18,19,20,21,22 central tube and have a flowing hole 27,28,29,30 and the outer tube 3 of lockhole 14 respectively to be threaded, space between central tube 4 and the outer tube 3 is by multi-level piston cylinder sleeve 23,24,25,26 are separated into 5 piston rods, piston-cylinder is threaded with central tube 4 respectively, piston-cylinder 26,25,24 is convex, piston-cylinder 23 is common annular, between these 5 piston rods, the multi-level piston 10 that has sealed packing is arranged, 9,8,7,6, piston 9,8,7 is spill, piston 10 is common annular, piston 6 is the ⊥ font, mobilizable lock ball 13 is arranged on it, the lock piston 12 that has shoulder 44 is arranged between piston 6 and the central tube 4, multi-level piston is at least by forming more than two, piston 6,7,8,9 have part gap 31 with the mating part of outer tube 3,32,33,34, piston 9,8,7, the non-level and smooth end face 35 of 6 projection, 36,37,38, when packer set, inject the flowing hole 17 of water from the central tube 3,18,19,20,21 enter, because cavity 39,40,41,42 by piston 9,8,7, the non-level and smooth end face 35 of the projection on 6,36,37,38 and piston 6,7,8,9 with the mating part gap 31 of outer tube 3,32,33,34 with the packer external communications, cavity 39,40,41, pressure in 42 is outside consistent with packer, piston 10,9,8,7, promotion pressure ring 15 is united after producing pressure reduction in 6 two ends, cut off the seat offset nail 11 on the pressure ring 15, promoting packing element 5 distortion again seals until seat, when the lock ball 13 on the piston 6 arrives the position of the lockhole 14 on the outer tube, lock piston 12 arrives the position of central tube flowing hole 22, lock piston 12 1 ends are by flowing hole 22 and central tube 4 internal communication, other end cavity 45 is by piston 6 non-level and smooth end faces 44 and packer external communications, lock piston 12 two ends produce pressure reduction, promoting lock piston 12 travels forward, until the shoulder 44 of lock piston 12 lock ball 13 jack-up, make 14 li of the lockhole of a part on outer tube 3 of lock ball 13, another part is in the aperture the inside of piston 6, piston 6 just is lockable with outer tube 3 like this, packing element 5 can not restore under the effect that is subjected to external force, packer set, at this moment need only the pressure of the pressure of packer outside smaller or equal to the central tube the inside, lock piston 12 just can not move, lock ball 13 just can not got back in the hole of piston 6, piston 6 can not produce relative motion with outer tube 3, and packer just can not deblocking; As long as the pressure of packer outside is greater than the pressure in the central tube, lock piston 12 will move backward, and the lock ball 13 on the piston 6 will be withdrawn in the hole, and piston 6 just produces relative motion with outer tube 3, and packing element 5 resets into uncompressed state, the packer deblocking.

Claims

1. water injection packer, comprise top connection (1), lower contact (2), outer tube (3), central tube (4), packing element (5), piston (10), (9), (8), (7), (6), lock piston (12), lock ball (13), pressure ring (15), seat offset nail (11), shelves rings (16), multi-level piston cylinder sleeve (23), (24), (25), (26), it is characterized in that, top connection (1) with have a flowing hole (17), (18), (19), (20), (21), (22) central tube (4) and have flowing hole (27), (28), (29), (30) and the outer tube (3) of lockhole (14) respectively to be threaded, space between central tube (4) and the outer tube (3) is by piston-cylinder (23), (24), (25), (26) be separated into 5 piston rods, piston-cylinder (23), (24), (25), (26) be threaded with central tube (4), piston-cylinder (23) is an annular, piston-cylinder (24), (25), (26) be convex, the piston (10) that has sealed packing is arranged between these 5 piston rods, (9), (8), (7), (6), piston (9), (8), (7) be spill, piston (10) is an annular, piston (6) Wei Shang font, mobilizable lock ball (13) is arranged on it, the lock piston (12) that has shoulder (44) is arranged between piston (6) and the central tube (4).

2. a kind of water injection packer according to claim 1 is characterized in that, described multi-level piston (10), (9), (8), (7), (6) are by forming more than two.

3. a kind of water injection packer according to claim 2 is characterized in that, there are part gap (31), (32), (33), (34) in described multi-level piston (9), (8), (7), (6) with the mating part of outer tube (3).

4. a kind of water injection packer according to claim 2 is characterized in that, the projection of described multi-level piston (9), (8), (7), (6) is non-level and smooth end face (35), (36), (37), (38), (43).