CN204344060U - The packer that fluid pressure type can repeatedly set - Google Patents

Abstract

The utility model discloses a kind of for the hydraulic packer in oil and gas exploitation field, solves existing packer and can not realize repeatedly setting problem.Its technical scheme: top connection lower end inside and central tube are threaded connection, outside and piston are threaded connection, and piston bush lower end and glue tube base are threaded connection; Packing element and spacer ring a are alternately assemblied on glue tube base from top to bottom successively, and end in spacer ring b; Neck bush upper end and glue tube base are threaded connection, and lower end and jump ring are threaded connection; Clip spring seat is placed between jump ring and transition joint, and transition joint upper end and central tube lower end are threaded connection; Transition joint lower end is connected with lower contact, and outer shell is placed between urceolus and transition joint; Sleeve, throttle valve element, spring, baffle ring are stuck between transition joint and lower contact successively.The utility model can realize repeatedly setting, and can not lose efficacy or potential safety hazard because of carrying out repeatedly setting generation packer.

Description

Hydraulic multi-setting packer

technical field

The utility model relates to a hydraulic packer used in the field of oil and natural gas exploitation.

Background technique

In oil production operations in oil fields, it is an effective method to control the rise of water cut in oil wells by using layered plugging water recovery technology for oil and gas resources in different oil layers to seal off high aquifers. Layered fracturing oil recovery technology needs to use packers. The existing types of packers usually cannot be set multiple times during oil recovery. Generally, during the process of setting seals, the sealing material expands, seals the annulus of the pipe string, and unsealing , lift the string to unlock the lock ring. In order to prevent midway sealing before setting, it needs to be fixed with pins. When setting, use the gravity of the pipe string to cut the pins, but this operation is irreversible. Some packers can be sealed multiple times, but there are also hidden dangers in operation.

Contents of the invention

The purpose of the utility model is to provide a hydraulic packer which can be set multiple times in order to solve the problem that the existing packer cannot be set multiple times, and even if it can be set, there are hidden dangers in operation.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a hydraulic packer that can be set multiple times, consisting of an upper joint, a piston sleeve, a piston, a rubber cylinder seat, a spacer a, a spacer b, an outer cylinder, Circlip, inner bushing, circlip seat, central tube, end gasket, outer cylinder, intermediate joint, lower joint, sleeve, throttle valve, spring, retaining ring, characterized in that the inner side of the lower end of the upper joint and the center The tube is threaded, the outer side is threaded with the piston, the lower end of the piston sleeve is threaded with the rubber cartridge seat, and the piston is assembled between the upper joint and the piston sleeve. The piston sleeve has multiple uniformly distributed through holes in the circumferential direction; The barrel and the spacer ring a are alternately assembled on the rubber barrel seat from top to bottom, and stop at the spacer ring b; the upper end of the inner bushing is connected with the rubber barrel seat through threads, and the lower end is connected with the circlip through threads, and the upper part of the inner bushing has There are multiple evenly distributed through holes in the circumferential direction, and there are multiple "U"-shaped grooves in the circumferential direction of the circlip; there are multiple uniform through holes in the circumferential direction of the outer cylinder, the circlip seat is placed between the circlip and the intermediate joint, and the upper end of the intermediate joint It is connected with the lower end of the center pipe through threads; the lower end of the middle joint is connected with the lower joint, and the outer cylinder is placed between the outer cylinder and the middle joint; the sleeve, throttle valve, spring, and retaining ring are sequentially stuck between the middle joint and the lower joint .

The beneficial effect of the utility model is that multiple setting seals can be realized, and packer failure or potential safety hazard will not occur due to multiple setting seals.

Description of drawings

Fig. 1 is a structural schematic diagram of a hydraulic packer capable of multiple setting of the utility model.

In the figure: 1. Upper joint, 2. Piston, 3. Piston sleeve, 4. Rubber cartridge seat, 5. Center tube, 6. Rubber cartridge, 7. Spacer ring a, 8. Spacer ring b, 9. Inner bushing , 10. Outer cylinder, 11. Circlip, 12. Circlip seat, 13. Outer cylinder, 14. Intermediate joint, 15. Lower joint, 16. Throttle valve, 17. Sleeve, 18. Spring, 19. retaining ring.

Detailed ways

According to the drawings, the hydraulic packer that can be set multiple times is composed of an upper joint, a piston sleeve, a piston, a rubber cylinder seat, a spacer a, a spacer b, an outer cylinder, a circlip, an inner bushing, a caliper Spring seat, central tube, end gasket, outer cylinder, intermediate joint, lower joint, sleeve, throttle valve, spring, retaining ring, characterized in that the inner side of the lower end of the upper joint 1 is connected with the central tube 5 through threads, and the outer It is threadedly connected with the piston 3, the lower end of the piston sleeve 2 is threaded with the rubber cartridge seat 4, and the piston 3 is assembled between the upper joint 1 and the piston sleeve 2, and the piston sleeve 2 has a plurality of evenly distributed through holes in the circumferential direction; The rubber cartridge 6 and the spacer ring a7 are alternately assembled on the rubber cartridge seat 4 from top to bottom, and stop at the spacer ring b8; the upper end of the inner bush 9 is threaded with the rubber cartridge seat 4, and the lower end is threaded with the circlip 11 , the upper part of the inner bushing has a plurality of evenly distributed through holes in the circumferential direction, and the circlip 11 has a plurality of "U"-shaped grooves in the circumferential direction; the outer cylinder 10 has a plurality of evenly distributed through holes in the circumferential direction, and the circlip seat 12 is placed on the circlip 11 and the intermediate joint 14, the upper end of the intermediate joint 14 is threadedly connected to the lower end of the center pipe 5; the lower end of the intermediate joint 14 is connected to the lower joint 15, and the outer cylinder 13 is placed between the outer cylinder 10 and the intermediate joint 14; the sleeve 17, The throttle valve element 16 , the spring 18 and the retaining ring 19 are sequentially stuck between the middle joint 14 and the lower joint 15 .

When working, high-pressure fluid is passed through the circumferential through hole of the piston sleeve 2, and the fluid passes through the gap between the piston 3, the rubber cylinder seat 4, and the central tube 5, and then flows into the circlip 11 and the outer cylinder through the circumferential through hole of the inner bushing 9 10, and finally flow out through the circumferential passage of the outer cylinder 10; the high-pressure fluid introduced will push the rubber cylinder seat 4 to move downward, and push the inner bush 9 and the circlip 11 to move downward, and finally to the circlip 11 is stuck together with the outer cylinder 10 to release the tubing pressure. Since the spacer ring 8 and the outer cylinder 10 are not moving, the rubber sleeve 6 will be compressed and expanded, and it will be pressed against the outer wall of the wellbore to play the role of isolation. When unsealing, lift up the string to separate the retaining spring 11 from the outer cylinder 10 to realize unsealing.

Claims (1)

1. The hydraulic packer can be set multiple times, which consists of upper joint, piston sleeve, piston, rubber cylinder seat, spacer ring a, spacer ring b, outer cylinder, retaining spring, inner bushing, retaining spring seat, center Pipe, end gasket, outer cylinder, intermediate joint, lower joint, sleeve, throttle valve, spring, retaining ring, characterized in that the inner side of the lower end of the upper joint (1) is connected with the central pipe (5) through threads, and the outer It is threadedly connected with the piston (3), the lower end of the piston bushing (2) is threaded with the rubber cartridge seat (4), and the piston (3) is assembled between the upper joint (1) and the piston bushing (2), and the piston bushing (2) There are multiple evenly distributed through holes in the circumferential direction; the rubber tube (6) and the spacer ring a (7) are assembled alternately on the rubber tube seat (4) from top to bottom, and stop at the spacer ring b (8 ); the upper end of the inner bushing (9) is threadedly connected with the rubber cartridge seat (4), and the lower end is threadedly connected with the circlip (11). 11) There are multiple "U"-shaped grooves in the circumferential direction; the outer cylinder (10) has multiple evenly distributed through holes in the circumferential direction, and the spring seat (12) is placed between the spring (11) and the intermediate joint (14) , the upper end of the middle joint (14) is threadedly connected to the lower end of the center pipe (5); the lower end of the middle joint (14) is connected to the lower joint (15), and the outer cylinder (13) is placed on the outer cylinder (10) and the middle joint (14) Between; Sleeve (17), throttle valve part (16), spring (18), stop ring (19) are stuck between middle joint (14) and lower joint (15) successively.