CN201190550Y

CN201190550Y - Self-strengthening balancing water-shutoff packer for horizontal well

Info

Publication number: CN201190550Y
Application number: CNU2008200898787U
Authority: CN
Inventors: 魏金辉; 王群; 李立东
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2009-02-04
Anticipated expiration: 2018-04-30

Abstract

The utility model discloses a self-centralizing balance water shutoff packer for a horizontal well, which relates to a packer. The utility model solves the problems of the prior packer of difficult water shutoff pipe column snubbing, water shutoff pipe column and bushing damage as well as poor sealing effect of the packer after being released. A center pipe (4) is connected with an upper joint (1) and a lower joint (26) in a threaded way, an upper shell body (7) is connected with the upper joint (1) in the threaded way, a lining pipe (8) is sleeved on the center pipe (4) which is arranged at the lower part of a spring lock seat (3), a centralizing mechanism (11) is fixed at the lower part of a cone (10) by an inside lock block (12) and an outside lock block (13), a packer rubber component (14) is sleeved on the lining pipe (8) which is arranged at the lower part of the centralizing mechanism (11), and the lower end of a lower shell body (20) is connected with the lower joint (26) in the threaded way. The utility model reduces the needed seat sealing pressure, ensures that the packer is not deblocked in the work state, and fulfills the functions of protecting the packer rubber and reducing the snubbing friction resistance of the pipe column. When the packer is released, an upper centralizing ball can expand the diameter outward to cause the packer to be placed in the middle, thereby ensuring the sealing effect.

Description

Horizontal well is from setting upright the balance Packer for blocking water

Technical field

The utility model relates to a kind of packer.

Background technology

Packer application can realize the layering extraction after the annular space separation with oil pipe and sleeve pipe, thereby realize the interlayer adjustment of oil well in the oil well down-hole.In water plugging of horizontal well tubing string rountrip, because the friction of tubing string and casing wall and water plugging string must be crossed bending section, water plugging string removes difficulty, and damage water plugging string and sleeve pipe, behind horizontal segment, packer will be attached to the casing wall downside under the tubing string action of gravity, it is relatively poor to discharge back packer sealing effect, the requirement that therefore conventional packer at all can not the adaptation level well.

The utility model content

The utility model provides a kind of horizontal well from setting upright the balance Packer for blocking water, the problem of the requirement that bending section makes water plugging string remove difficulty, damages water plugging string and sleeve pipe because the friction of tubing string and casing wall and water plugging string must be crossed to solve existing packer, packer sealing weak effect after the release, conventional packer can not the adaptation level wells.The utility model comprises top connection, deblocking pin, clip spring seat, central tube, jump ring, jump ring lower pressing cap, goes up shell body, bushing pipe, connector, cone, righting mechanism, interior lock dog, outer lock dog, packing element assembly, sets pin, on set piston, down dummy piston, spacing jump ring, isolation seat, lower casing body, pin, bottom balance auxiliary piston, down set piston, down set upright ball cap, set upright ball and lower contact down; Central tube is threaded with top connection and lower contact, the upper end of last shell body is sleeved in the top connection and with the upper shoulder end face of top connection and leans on mutually, last shell body is threaded with top connection, clip spring seat is enclosed within on the central tube and passes through the deblocking dowel fixes in top connection, jump ring is installed in the jump ring groove of clip spring seat, the jump ring lower pressing cap places between clip spring seat and the last shell body and with the lower thread of clip spring seat and is connected, liner sleeve is contained on the central tube of clip spring seat bottom, cone is sleeved on the bushing pipe, connector places between shell body and the cone, connector is threaded with last shell body and cone, righting mechanism is fixed on the bottom of cone by interior lock dog and outer lock dog, the packing element assembly is sleeved on the bushing pipe of righting mechanism bottom, the upper surface of lower casing body is leaned on mutually with the lower surface of packing element assembly, the lower end of lower casing body is threaded with lower contact, on set piston and place between lower casing body and the bushing pipe and by setting dowel fixes on the lower casing body, the upper end of following dummy piston with on set piston interior shoulder end face mutually by and be sleeved on the central tube of bushing pipe bottom, isolation seat places down the dummy piston bottom and is positioned at the last inlet opening place of central tube, the top of isolation seat is fixed on the central tube by spacing jump ring, the following inlet opening place of the bottom centering pipe of isolation seat, bottom balance auxiliary piston be enclosed within on the isolation seat and by dowel fixes in the last lower part of piston that sets, set piston down and place the bottom of bottom balance auxiliary piston and be sleeved on the isolation seat, set upright ball down and be embedded in the annular groove in the lower contact by setting upright ball cap down.

The utlity model has following beneficial effect: the utility model adopts twin-stage to set plunger designs, has increased to set area under the situation that does not increase the instrument outside dimension, has reduced the pressure that sets that needs; Adopt two-stage balanced plunger designs, the deblocking pin is not sheared when packing element has pressure reduction up and down, protection deblocking pin guarantees under the packer duty not deblocking; The packer two ends have been designed and have been set upright ball, play the protection packing element and reduce the effect that tubing string removes frictional resistance, when discharging packer, on set upright outwards hole enlargement of ball, make packer placed in the middle, guaranteed sealing effectiveness.

Description of drawings

Fig. 1 is an overall structure half sectional view of the present utility model, and Fig. 2 is the A portion enlarged drawing of Fig. 1, and Fig. 3 is the B portion enlarged drawing of Fig. 1, and Fig. 4 is the C portion enlarged drawing of Fig. 1, and Fig. 5 is the D portion enlarged drawing of Fig. 1.

The specific embodiment

The specific embodiment one: in conjunction with Fig. 1-5 explanation present embodiment, present embodiment comprises top connection 1, deblocking pin 2, clip spring seat 3, central tube 4, jump ring 5, jump ring lower pressing cap 6, goes up shell body 7, bushing pipe 8, connector 9, cone 10, righting mechanism 11, interior lock dog 12, outer lock dog 13, packing element assembly 14, sets pin 15, on set piston 16, down dummy piston 17, spacing jump ring 18, isolation seat 19, lower casing body 20, pin 21, bottom balance auxiliary piston 22, down set piston 23, down set upright ball cap 24, set upright ball 25 and lower contact 26 down; Central tube 4 is threaded with top connection 1 and lower contact 26, the upper end of last shell body 7 is sleeved in the top connection 1 and with the upper shoulder end face 1-1 of top connection 1 and leans on mutually, last shell body 7 is threaded with top connection 1, clip spring seat 3 is enclosed within on the central tube 4 and by deblocking pin 2 and is fixed in the top connection 1, jump ring 5 is installed in the jump ring groove 3-1 of clip spring seat 3, jump ring lower pressing cap 6 places between clip spring seat 3 and the last shell body 7 and with the lower thread of clip spring seat 3 and is connected, bushing pipe 8 is sleeved on the central tube 4 of clip spring seat 3 bottoms, cone 10 is sleeved on the bushing pipe 8, connector 9 places between shell body 7 and the cone 10, connector 9 is threaded with last shell body 7 and cone 10, righting mechanism 11 is fixed on the bottom of cone 10 by interior lock dog 12 and outer lock dog 13, packing element assembly 14 is sleeved on the bushing pipe 8 of righting mechanism 11 bottoms, the upper surface of lower casing body 20 is leaned on mutually with the lower surface of packing element assembly 14, the lower end of lower casing body 20 is threaded with lower contact 26, on set piston 16 and place between lower casing body 20 and the bushing pipe 8 and and be fixed on the lower casing body 20 by setting pin 15, the upper end of following dummy piston 17 with on set piston 16 interior shoulder end face 16-1 mutually by and be sleeved on the central tube 4 of bushing pipe 8 bottoms, isolation seat 19 places down dummy piston 17 bottoms and is positioned at the last inlet opening 4-1 place of central tube 4, the top of isolation seat 19 is fixed on the central tube 4 by spacing jump ring 18, the following inlet opening 4-2 place of the bottom centering pipe 4 of isolation seat 19, bottom balance auxiliary piston 22 is enclosed within on the isolation seat 19 and is fixed on the bottom that sets piston 16 by pin 21, set piston 23 down and place the bottom of bottom balance auxiliary piston 22 and be sleeved on the isolation seat 19, set upright ball 25 down and be embedded in the annular groove 26-1 in the lower contact 26 by setting upright ball cap 24 down.Packer steel body diameter φ 106mm; set upright steel ball maximum outside diameter φ 110mm; when setting; liquid is on the central tube bottom; following inlet opening enter down respectively dummy piston and under set the piston bottom; setting piston in the promotion cuts off and sets pin; up compression protection packing element and cartridge; make their radially hole enlargement packing oil sets annular spaces; in this process; bushing pipe is also up thereupon, and breach on bushing pipe and interior lock dog position are at once, and interior lock dog and outer lock dog lose inner support and inwardly receive; after the screw thread of exercising its upper end on the bushing pipe and jump ring hang up; set and finish, after the central tube internal pressure released, protection packing element and cartridge can not reclaim; upper lifting pipe post during deblocking; central tube is up, and protection packing element and cartridge can not be up under the effect of sleeve friction power, thus disconnected deblocking pin; protection packing element and cartridge are regained under self elastic force effect, finish deblocking.

The specific embodiment two: in conjunction with Fig. 1 and Fig. 3 present embodiment is described, in the present embodiment righting mechanism 11 by set upright ball seat upper casing 11-1, on set upright ball 11-2, on set upright ball cap 11-3 and set upright ball seat main body 11-4 and form; On set upright ball 11-2 by on set upright ball cap 11-3 and be fixed on and set upright in the ball seat main body 11-4, set upright ball seat upper casing 11-1 and set upright ball seat main body 11-4 and be threaded.Can play certain effect of setting upright and reducing to rub when going into the well, set upright when setting the ball seat main body be pushed up, on to set upright ball up along the conical surface of cone, outwards hole enlargement makes packer placed in the middle, guarantees sealing effectiveness.

The specific embodiment three: in conjunction with Fig. 1 present embodiment is described, packing element assembly 14 is made up of protection packing element 14-1, spacer ring 14-2 and cartridge 14-3 in the present embodiment; Protection packing element 14-1 and cartridge 14-3 from top to bottom are arranged alternately, and between protection packing element 14-1 and the cartridge 14-3 and the outer end of protection packing element 14-1 and cartridge 14-3 is equipped with spacer ring 14-2.Upper lifting pipe post during deblocking, protection packing element and cartridge can not be up under the effect of sleeve friction power, thus disconnected deblocking pin, protection packing element and cartridge are regained under self elastic force effect, finish deblocking.

The specific embodiment four: present embodiment is described in conjunction with Fig. 1, what present embodiment and the specific embodiment one were different is: present embodiment also increases a plurality of sealing rings 27, between top connection 1 and central tube 4, between top connection 1 and the last shell body 7, between clip spring seat 3 and the central tube 4, between clip spring seat 3 and the last shell body 7, bushing pipe 8 and on set between the piston 16, between central tube 4 and the following dummy piston 17, on set between piston 16 and the following dummy piston 17, isolation seat 19 and on set between the piston 16, between bottom balance auxiliary piston 22 and the isolation seat 19, bottom balance auxiliary piston 22 and on set between the piston 16, under set between piston 23 and the isolation seat 19, under set between piston 23 and the lower casing body 20, be equipped with sealing ring 27 between lower contact 26 and the lower casing body 20.So being provided with is in order to realize the excellent sealing of whole device.

Claims

1, horizontal well is from setting upright the balance Packer for blocking water, and it comprises top connection (1), deblocking pin (2), clip spring seat (3), central tube (4), jump ring (5), jump ring lower pressing cap (6), last shell body (7), bushing pipe (8), connector (9), cone (10), righting mechanism (11), interior lock dog (12), outer lock dog (13), packing element assembly (14), set pin (15), on set piston (16), following dummy piston (17), spacing jump ring (18), isolation seat (19), lower casing body (20), pin (21), bottom balance auxiliary piston (22), under set piston (23), under set upright ball cap (24), under set upright ball (25) and lower contact (26); It is characterized in that central tube (4) is threaded with top connection (1) and lower contact (26), the upper end of last shell body (7) is sleeved on top connection (1) and goes up and lean on mutually with the upper shoulder end face (1-1) of top connection (1), last shell body (7) is threaded with top connection (1), clip spring seat (3) is enclosed within central tube (4) and goes up and be fixed in the top connection (1) by deblocking pin (2), jump ring (5) is installed in the jump ring groove (3-1) of clip spring seat (3), jump ring lower pressing cap (6) places between clip spring seat (3) and the last shell body (7) and with the lower thread of clip spring seat (3) and is connected, bushing pipe (8) is sleeved on the central tube (4) of clip spring seat (3) bottom, cone (10) is sleeved on the bushing pipe (8), connector (9) places between shell body (7) and the cone (10), connector (9) is threaded with last shell body (7) and cone (10), righting mechanism (11) is fixed on the bottom of cone (10) by interior lock dog (12) and outer lock dog (13), packing element assembly (14) is sleeved on the bushing pipe (8) of righting mechanism (11) bottom, the upper surface of lower casing body (20) is leaned on mutually with the lower surface of packing element assembly (14), the lower end of lower casing body (20) is threaded with lower contact (26), on set piston (16) and place between lower casing body (20) and the bushing pipe (8) and and be fixed on the lower casing body (20) by setting pin (15), the upper end of following dummy piston (17) with on set piston (16) interior shoulder end face (16-1) mutually by and be sleeved on the central tube (4) of bushing pipe (8) bottom, the last inlet opening (4-1) that isolation seat (19) places down dummy piston (17) bottom and is positioned at central tube (4) is located, the top of isolation seat (19) is fixed on the central tube (4) by spacing jump ring (18), the following inlet opening (4-2) of the bottom centering pipe (4) of isolation seat (19) is located, bottom balance auxiliary piston (22) is enclosed within isolation seat (19) and upward and by pin (21) is fixed on the bottom that sets piston (16), set piston (23) down and place the bottom of bottom balance auxiliary piston (22) and be sleeved on the isolation seat (19), set upright ball (25) down and be embedded in the annular groove (26-1) in the lower contact (26) by setting upright ball cap (24) down.

2, horizontal well according to claim 1 is from setting upright the balance Packer for blocking water, it is characterized in that righting mechanism (11) by set upright ball seat upper casing (11-1), on set upright ball (11-2), on set upright ball cap (11-3) and set upright ball seat main body (11-4) and form; On set upright ball (11-2) by on set upright ball cap (11-3) and be fixed on and set upright in the ball seat main body (11-4), set upright ball seat upper casing (11-1) and set upright ball seat main body (11-4) and be threaded.

3, horizontal well according to claim 1 is characterized in that from setting upright the balance Packer for blocking water packing element assembly (14) is by protecting packing element (14-1), spacer ring (14-2) and cartridge (14-3) to form; Protection packing element (14-1) and cartridge (14-3) from top to bottom are arranged alternately, and between protection packing element (14-1) and the cartridge (14-3) and the outer end of protection packing element (14-1) and cartridge (14-3) is equipped with spacer ring (14-2).

4, horizontal well according to claim 1 is from setting upright the balance Packer for blocking water, it is characterized in that the utility model also comprises a plurality of sealing rings (27), between top connection (1) and central tube (4), between top connection (1) and the last shell body (7), between clip spring seat (3) and the central tube (4), between clip spring seat (3) and the last shell body (7), bushing pipe (8) and on set between the piston (16), between central tube (4) and the following dummy piston (17), on set between piston (16) and the following dummy piston (17), isolation seat (19) and on set between the piston (16), between bottom balance auxiliary piston (22) and the isolation seat (19), bottom balance auxiliary piston (22) and on set between the piston (16), under set between piston (23) and the isolation seat (19), under set between piston (23) and the lower casing body (20), be equipped with sealing ring (27) between lower contact (26) and the lower casing body (20).