CN2658386Y

CN2658386Y - Closed high pressure washable well packer

Info

Publication number: CN2658386Y
Application number: CN 200320102469
Authority: CN
Inventors: 尹旭东; 尹丽春
Original assignee: YIN XUDON
Current assignee: YIN XUDON
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2004-11-24
Anticipated expiration: 2013-10-31

Abstract

The utility model relates to a seal-type high-pressure-bearing washable well packer, mainly resolves the problem that the prior well packer has a bad packing and unpacking effect, and is characterized in that a lower connector (22) is externally and internally provided with a central pipe(21) and a lower operating cylinder (10)having a hole(24); a spring sleeve(17), a position-limited sleeve(18) fixed by a position-limited pin, a plurality of unpacking grabs (19) hinged with a pin(20) are successively arranged between the central pipe(21) and the lower operating cylinder (10); the unpacking grabs(19) are clamped with an end surface of a casing (28); an unpacking sleeve (14) with a lug boss (23) is positioned between the spring sleeve(17) and the lower operating cylinder (10). A fixing seat (15) connected with the central pipe (21) through an unpacking pin (25) and a spring plate (16) are respectively arranged on and under the lug boss (23). A L-shaped seal sleeve (11) and a seal sleeve seat (13) provided with a channel (12) is clamped and positioned between the lower operating cylinder (10), the top of the unpacking sleeve(14) and the central pipe(21). The utility model has the advantages of a good packing and unpacking effect with a high packing and unpacking success rate.

Description

Closed is held high pressure 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 closed and holds high pressure 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 great majority of institute's use packer are to adopt the deblocking pin to carry out deblocking at present, and such packer complex structure not only, and the deblocking effect is bad, the pressure reduction that bears is little, packer can occur and move down phenomenon, when not needing deblocking, be subjected to simultaneously the automatic deblocking of effect deblocking pin meeting of down-hole wave force sometimes, make the packing element of packer obtain in advance discharging, lost the effect that sets of packer, can not normally cut off pin and during deblocking, will break packing element and force deblocking when packer, cause the cost of production height.

The utility model content:

In order to overcome the deficiency of existing packer setting, deblocking weak effect, the utility model provides a kind of closed to hold high pressure washing well packer, this packer have set, the deblocking good effectiveness.

The technical scheme that the utility model adopted is: a kind of closed is held high pressure washing well packer and is comprised central tube, lower contact and sleeve pipe, sleeve pipe links to each other by box cupling, be equipped with central tube and following seating nipple with holes inside and outside the lower contact, be equipped with spring housing successively between central tube and the following seating nipple, by the fixing stop collar of position-limitting pin and sell several hinged deblocking pawls, the deblocking pawl blocks mutually with box face, be equipped with the big envelope of separating of band boss between spring housing and the following seating nipple, be equipped with anti-" 7 " shape sealing shroud of card mutually between being equipped with respectively up and down of boss, following seating nipple and deblocking cover top and central tube and have the sealing block set of passage by deblocking pin the link to each other holder and the spring leaf of central tube.

Above-mentioned deblocking pawl can be 2～8 and can be by spherical, shaft-like and block substitute.

The beneficial effects of the utility model are: this packer is equipped with spring housing successively owing to having adopted between central tube and the following seating nipple, by the fixing stop collar of position-limitting pin and several deblocking pawls of swivel pin, the deblocking pawl blocks mutually with box face, be equipped with the big envelope of separating of band boss between spring housing and the following seating nipple, being equipped with respectively up and down of boss by deblocking pin the link to each other holder and the spring leaf of central tube, during deblocking, during the upper lifting pipe post, selling hinged deblocking pawl warp enters sleeve pipe and slides in sleeve pipe in the hole of seating nipple down under the effect of spring leaf elastic force, central tube is carried the annular space that can make the deblocking pawl enter two sleeve pipe junctions on continuing, the deblocking pawl is stuck in box face, play the fastening effect, connect and straighten one out and ease out his anxiety big envelope and expose relief hole, realize the packer deblocking, carry out deblocking, deblocking is effective, and is time saving and energy saving, high efficiency.

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-piston bush among Fig. 1,2-piston body, 3-piston ectosome, 4-well-flushing inlet opening, 5-bearing, the 6-packing element, 7-compression ring, the last seating nipple of 8-, 9-joint, seating nipple under the 10-, the 11-sealing shroud, the 12-passage, 13-seals block set, and 14-separates big envelope, the 15-holder, the 16-spring leaf, 17-spring housing, 18-stop collar, 19-deblocking pawl, 20-pin, the 21-central tube, 22-lower contact, 23-boss, 24-hole, 25-deblocking pin, the 26-inlet opening, 27-inlet opening, 28-sleeve pipe, 29-box cupling.

The specific embodiment:

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

As shown in FIG., closed is held high pressure washing well packer and is comprised central tube 21, lower contact 22 and sleeve pipe 28, sleeve pipe 28 links to each other by box cupling 29, be equipped with the following seating nipple 10 of central tube 21 and with holes 24 inside and outside the lower contact 22, be equipped with spring housing 17 successively between central tube 21 and the following seating nipple 10, by the fixing stop collar 18 of position-limitting pin and sell 20 a hinged deblocking pawl 19 of doing, deblocking pawl 19 blocks mutually with sleeve pipe 28 end faces, deblocking pawl 19 can rotate around pin 20, when deblocking pawl 19 enters the annular space of two sleeve pipes, 28 junctions and box cupling 29 formation, deblocking pawl 19 and the end face of sleeve pipe 28 block mutually and play fastening and firmly act on, can also use simultaneously and can finish the spherical of same function, shaft-like and block deblocking pawl, deblocking pawl 19 can select 2～8 can finish decapsulation functions, but see that from the field experiment situation 4 of selections are preferred plan, what be equipped with band boss 23 between spring housing 17 and the following seating nipple 10 separates big envelope 14, being equipped with respectively up and down of boss 23 by deblocking pin the link to each other holder 15 and the spring leaf 16 of central tube 21, following seating nipple 10 and separate between big envelope 14 tops and the central tube 21 and be equipped with the sealing block set 13 of blocking anti-7 shape sealing shrouds 11 mutually and having passage, sealing shroud 11 plays the effect of shutoff access opening 12, makes central tube 21, joint 9, looping closed cavity between following seating nipple 10 and the sealing shroud 11.

When setting, when the inlet opening 26 of liquid through central tube 21 upper ends enters the annular space of central tube 21 and 1 formation of packed-piston cover, under the effect of fluid pressure, promote packed-piston body 2, piston ectosome 3 moves downward, when the lower surface of piston ectosome 3 is walked to when separating mutually with the upper surface of bearing 6, piston body 2 shutoff well-flushing inlet opening 4, simultaneously with the well-flushing channel seal on the bearing 6, promote bearing 5 compression packing elements 6 and make packer setting; Hydraulic pressure enters the annular space of central tube 21 and 10 formation of following seating nipple by anti-" 7 " shape one way valve sealing shroud 11 upper ends through the inlet opening 27 of central tube 21 lower ends simultaneously, it is up to promote joint 9, set pin and cut off, promote the up and compression packing element 6 of compression ring 7 and realize setting; Setting at present, the last simultaneously enforcement deblocking of seating nipple 10 pawl 19 ejects to internal surface of sleeve pipe under the effect of spring leaf 16.

During well-flushing, when injection water is injected by oil sets annular space, up from the upper surface promotion packed-piston body 2 and the piston ectosome 3 of bearing 5, open well-flushing inlet opening 4 and enter the well-flushing passage, at this moment, can well-flushing, do not need the deblocking of packer just can finish washing well process.

When the needs deblocking, the upper lifting pipe post, it is up to drive central tube 21 and lower contact 22, deblocking pawl 19 is positioned to separate in the big envelope 14, deblocking pawl 19 is stuck in sleeve pipe 28 inwalls again, so it is descending that deblocking pawl 19 is conciliate big envelope 14 simultaneously relative central tubes 21 when the upper lifting pipe post, deblocking pawl 19 enters the annular space of sleeve pipe 28 junctions and box cupling 29 formation under the effect of spring leaf 16 elastic force, deblocking pawl 19 is stuck in the end face of two sleeve pipes 28 at this moment, play the fastening effect, deblocking pawl 19 draws back separates big envelope 14, and opens the relief hole 12 on the sealing block set 13, central tube 21 is communicated with the oil jacket ring cavity with the hydraulic cavities of 10 of following seating nipples, and packer is by the pressure release deblocking.

Owing to used this packer, can bear high pressure and set, simultaneously can also be when packer setting well-flushing, set, deblocking is effective, time saving and energy saving, high efficiency.

Claims

1, a kind of closed is held high pressure washing well packer, comprise central tube (21), lower contact (22) and sleeve pipe (28), sleeve pipe (28) links to each other by box cupling (29), it is characterized in that: the following seating nipple (10) that is equipped with central tube (21) and (24) with holes inside and outside the lower contact (22), be equipped with spring housing (17) successively between central tube (21) and the following seating nipple (10), the stop collar (18) that position-limitting pin is fixing and pin several hinged deblocking pawls (19) of (20), deblocking pawl (19) blocks mutually with sleeve pipe (28) end face, what be equipped with band boss (23) between spring housing (17) and the following seating nipple (10) separates big envelope (14), being equipped with respectively up and down by deblocking pin (25) the link to each other holder (15) and the spring leaf (16) of central tube (21) of boss (23), following seating nipple (10) and separating are equipped with instead " 7 " shape sealing shroud (11) and have the sealing block set (13) of passage (12) of card mutually between big envelope (14) top and the central tube (21).

2, closed according to claim 1 is held high pressure washing well packer, it is characterized in that: deblocking pawl (19) can be 2～8 and can be by spherical, shaft-like and block substitute.