CN2559781Y

CN2559781Y - Balance pressure packer

Info

Publication number: CN2559781Y
Application number: CN 02274276
Authority: CN
Inventors: 刘春雨; 隋薇; 杨福军
Original assignee: FUXIN PETROLEUM TOOL WORKS
Current assignee: FUXIN PETROLEUM TOOL WORKS
Priority date: 2002-07-18
Filing date: 2002-07-18
Publication date: 2003-07-09
Anticipated expiration: 2012-07-18

Abstract

The utility model particularly relates to a balance pressure packer, which is provided with a central pipe 15 and a rubber cylinder shaft 14 which are locked by an upper fixture block 17; a main piston 21 and an auxiliary piston 21 arranged between the central pipe 15 and a cylinder 30 are locked and connected by a lower fixture block 24 and hang to be connected with a rubber cylinder 16 by a pressing-down ring 18; the lower internal side of an upper joint 1 of the balance device is hermetically screwed with the central pipe 15; the outside is screwed with the upper internal end of a sealing sleeve 3; the upper internal side and the lower internal side of the sealing sleeve 3 are provided with a rubber sealing ring 2 and a rubber sealing ring 9; the upper end of the rubber cylinder shaft 14 is provided with a balance piston 6 which constitutes a balance ring chamber 7 with the sealing sleeve 3; the outside of the sealing ring 3 is provided with a balance hole 8 which is communicated with the balance ring chamber 7; the internal side and the external side of the balance piston 6 are provided with a rubber sealing ring 4 and a rubber sealing ring 5. The balance pressure packer of the utility model has the advantages of automatically balancing pressure difference, reducing the shearing force of a pin when releasing the sealing, easy unsealing, and reliable work.

Description

The equilibrium pressure packer

Affiliated technical field the utility model belongs to petroleum machinery, the equilibrium pressure packer of particularly a kind of water blockoff, water injection technology.

Background technology is present, the employed no support hydraulic pressure base sealed packer in oil vapour field, high pressure liquid stream acts on packer accessory during work, be delivered to the deblocking pin by sealing device, the easy deblocking of the packer that deblocking power is little causes packing to lose efficacy, the packer deblocking difficulty that deblocking power is big serious causes overhaul.

The summary of the invention the purpose of this utility model is to overcome above technical deficiency, autobalance pressure reduction when a kind of work is provided, reduce deblocking pin shearing force, deblocking easily, the equilibrium pressure packer of reliable operation.

Task of the present utility model is, the equilibrium pressure packer, have central tube and packing element axle by last fixture block interlocking, the master who between central tube and cylinder barrel, installs, auxiliary piston is by following fixture block interlocking, warp pressure ring down articulates packing element, the top connection lower end of bascule is inboard to be connected with the central tube thread seal, the outside connects with sealing shroud upper end inside thread, on the sealing shroud, following installed inside rubber seal, balanced plug is installed in packing element axle upper end and sealing shroud constitutes the balance ring cavity, the sealing shroud outside has balance pipe and communicates with the balance ring cavity, in the balanced plug, rubber seal is installed in the outside, packing element axle outside screw connects upper press ring and connects sealing shroud by the deblocking pin, in the upper press ring, rubber seal is installed in the outside, and the padlock ring is threaded with main piston in the lock ring seat that packing element axle lower end is threaded.

The utlity model has following characteristics, one, the packing element axle of equilibrium pressure packer, main piston are respectively by upper and lower fixture block interlocking central tube, the packer seat envelope that is hampered not, its two, the packing element axle of equilibrium pressure packer connects the sealing shroud Compositional balance ring cavity that balanced plug is connected with top connection, reduce the active force of high pressure liquid stream during work to packing element, alleviate deblocking pin shearing force, deblocking pin deblocking power is little, can not lose efficacy during work.

Description of drawings specifies with embodiment below in conjunction with accompanying drawing.

Fig. 1 shows equilibrium pressure packer construction figure.

Among Fig. 1,1-top connection; 2-rubber seal; 3-sealing shroud; 4-rubber seal; 5-rubber seal; 6-balanced plug; 7-balance ring cavity; 8-balance pipe; 9-rubber seal; 10-rubber seal; 11-rubber seal; 12-upper press ring; 13-deblocking pin; 14-packing element axle; 15-central tube; 16-packing element; 17-upward fixture blocks; 18-following pressure ring; 19-lock ring seat; 20-lock ring; 21-main piston; 22-rubber seal; 23-rubber seal; 24-following fixture block; 25-seat offset nail; 26-seat sealing of hole; 27-auxiliary piston; 28-rubber seal; 29-rubber seal; 30-cylinder barrel

The specific embodiment is with reference to accompanying drawing 1, the packing element axle 14 of equilibrium pressure packer, main piston 21 are respectively by upper and

lower fixture block

17,24 interlockings pressure ring 18 under central tube 15, interlocking, top connection 1, cylinder barrel 30 are threaded with central tube 15, sealing shroud 3 is threaded with top connection 1, the packer seat envelope that is hampered not; During the seat envelope, high pressure liquid stream enters the balance ring cavity 7 that major and

minor piston

21,27, cylinder barrel 30 and central tube 15 are formed by seat sealing of hole 26, cuts off an offset nail 25, auxiliary piston 27 is descending, open down lock dog 24, main piston 21 connects pressure ring 18 up compression packing elements 16 down, lock ring 20 lockings simultaneously; During work, the upper end high pressure liquid stream presses down packing element 16, by following pressure ring 18, main piston 21, lock ring 20, lock ring seat 19, packing element axle 14, be delivered to upper press ring 12, simultaneously the upper end high pressure liquid stream enters balance ring cavity 7 by balance pipe 8 and acts on balanced plug 6, on carry packing element axle 14, be delivered to upper press ring 12, reduce the active force of operating pressure, reduce to shear deblocking pin 13 suffered shearing forces upper press ring 12; During deblocking, the upper lifting pipe post is cut off deblocking pin 13, discharges lock ring seat 19 and is threaded with packing element axle 14, unlocks, and removes packing.

Claims

1. equilibrium pressure packer, have central tube (15) and packing element axle (14) by last fixture block (17) interlocking, the main piston of between central tube (15) and cylinder barrel (30), installing (21), auxiliary piston (21) is by following fixture block (24) interlocking, warp pressure ring (18) down articulates packing element (16), the inboard, top connection (1) lower end that it is characterized in that upper end connection bascule is connected with central tube (15) thread seal, the outside connects with sealing shroud (3) upper end inside thread, on the sealing shroud (3), following installed inside rubber seal (2), (9), balanced plug (6) is installed in packing element axle (14) upper end, constitute balance ring cavity (7) with sealing shroud (3), sealing shroud (3) outside has balance pipe (8) and communicates with balance ring cavity (7), in the balanced plug (6), rubber seal (4) is installed in the outside, (5).

2. equilibrium pressure packer according to claim 1 is characterized in that the deblocking pin (13) that packing element axle (14) outside screw connects on the upper press ring (12) connects sealing shroud (3), and rubber seal (11), (13) are installed in upper press ring (12) medial and lateral.