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Pressure balancing inclined plane locking-type gradually deblocking packer

A packer and slope technology, which is applied in the field of pressure balanced slope lock-type step-by-step unpacking packers, can solve the problem that the pin is small and easy to unpack, and cannot be adapted to the pipe strings and pins above the fifth-stage packer with subdivision water injection. It is difficult to unpack and other problems, so as to reduce the lifting force of the pipe string, increase the number of connections on the water injection pipe string, and improve the safety and reliability.

Active Publication Date: 2012-12-19
大庆市亚盛油田技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of the existing packer setting pin and unsealing pin integrated structure, the small pin is easy to unsealing and the large pin is not easy to unsealing, and it cannot adapt to the subdivision of the water injection five-stage packer and above the technical problem

Method used

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  • Pressure balancing inclined plane locking-type gradually deblocking packer
  • Pressure balancing inclined plane locking-type gradually deblocking packer
  • Pressure balancing inclined plane locking-type gradually deblocking packer

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] As shown in the accompanying drawings, the pressure-balanced slope locking type step-by-step unpacking packer includes a well-flushing mechanism, an unsealing mechanism and a setting mechanism, and is characterized in that:

[0021] The above-mentioned setting mechanism includes a lower outer tube 2 , a lower joint 1 , an outer central tube 8 , a central tube 3 , a setting piston 4 , a push sleeve 5 , a lower push ring 6 , a rubber tube and a lock sleeve 7 .

[0022] Described lower outer pipe 2 is tubular, and the lower end has tapered pipe internal thread.

[0023] The upper and lower ends of the lower joint 1 have external threads respectively, and the upper end external thread is connected with the lower outer pipe 2, the lower end external thread is connected with the tubing string, and the upper end also has internal thread and is connected with the center pipe...

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Abstract

The invention relates to a pressure balancing inclined plane locking-type gradually deblocking packer, mainly aiming at solving the problems of poor safety, less packer connecting number and difficult deblocking of the existing packer. The pressure balancing inclined plane locking-type gradually deblocking packer is characterized in that the upper end of a central pipe (3) is connected with a central pipe joint (16); a reversed L-shaped opening (17) is arranged under an upper joint (13); a boss (19) arranged outside the central pipe joint (16) is arranged inside the opening (17) of the upper joint (13), and is connected by a pin (23); a right inclined plane (20) under the boss (19) is inosculated with a lower guide inclined plane (18) of the opening (17); a locking block (21) on a balancepiston (14) is positioned inside opening (17); the right of the upper end of the locking block (21) is provided with a guide inclined plane (27) inosculated with a left inclined plane (22) under the boss; and the wall of the central pipe (3) at the lower end of the balance piston (14) is provided with a through hole (24). The pressure balancing inclined plane locking-type gradually deblocking packer has the characteristics of safety, reliability, more connecting number and easy deblocking.

Description

Technical field: [0001] The invention relates to a packer used in a water injection well in the field of oil production in an oil field, in particular to a pressure-balanced inclined plane locking type step-by-step unpacking packer. Background technique: [0002] As the field develops, more reservoirs are injected with water in the same well to increase recovery. This is the subdivision water injection in the oil field. Subdivision water injection requires a large number of packers to be connected to the water injection string to seal off the oil layer through the packers. The technical structure of the current packer is generally that the unsealing pin is also the setting pin, which is used to lock the entire setting mechanism during setting to keep the rubber tube compressed, and the rubber tube is released by cutting this pin during unsealing. This problem has always existed in practice for many years; if the pin is smaller, when the external pressure rises during the wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127E21B21/00
Inventor 何富全
Owner 大庆市亚盛油田技术开发有限公司
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