Hydraulic unsealing oil pipe anchor

A technology for hydraulic unsealing and tubing anchors, which can be used in wellbore/well components, earth-moving drilling, etc., and can solve the problem of high operating costs

Active Publication Date: 2019-10-18
大庆华油石油科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, it is necessary to anchor the tubing string at different positions through the tubing anchor twice in a set of processes. In order to meet this requirement, it is currently necessary to use the tubing anchor and lift the tubing string twice, and the operating cost is relatively high.

Method used

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  • Hydraulic unsealing oil pipe anchor
  • Hydraulic unsealing oil pipe anchor

Examples

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] This embodiment includes an upper joint 23, a central pipe 1, slips 2 and a seating and unsealing mechanism. The above are common structures in the prior art, and will not be repeated here.

[0016] The upper joint 23 is connected to the upper end of the central tube 1 through threads, and the setting and unsealing mechanism includes a cone 3, a setting piston, a piston sleeve 5, a locking sleeve 9, a setting sleeve 10, a locking spring hanger 7, a lower joint 12 and a setting pin 11. The cone 3 is connected to the upper end of the piston sleeve 5 through threads, the setting piston is arranged in the piston sleeve 5, the piston sleeve 5 and the setting sleeve 10 are integrally connected through threads, and the locking sleeve 9 is connected to the setting sleeve 10 through threads, The lower joint 12 is screwed to the lower end of the central pipe 1, the setting sl...

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PUM

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Abstract

The invention discloses a hydraulic unsealing oil pipe anchor, and relates to the technical field of oil field downhole tools. The hydraulic unsealing oil pipe anchor includes an upper joint, a central pipe, a slip and a setting and unsealing mechanism. The upper joint is threadedly connected to the upper end of the central pipe. The setting and unsealing mechanism includes a cone, a setting piston, a piston sleeve, a lock sleeve, a setting sleeve, a lock spring hook, a lower joint and a setting pin. The cone is threadedly connected to the upper end of the piston sleeve. The setting piston isarranged in the piston sleeve. The piston sleeve and the setting sleeve are threadedly connected into one body. The lock sleeve is threadedly connected to the setting sleeve. The lower joint is threadedly connected to the lower end of the central pipe. The setting sleeve is connected to the lower joint through the setting pin. The lock spring hook is threadedly connected to the central pipe. The side wall of the central pipe is provided with an internal liquid passing hole. The side surface of the cone is provided with an external liquid passing hole. Through the arrangement of the combined setting piston composed of a main piston and an auxiliary piston, the piston sleeve and the setting sleeve are forced to be completely reset.

Description

technical field [0001] The invention belongs to the technical field of oil field downhole tools, in particular to a hydraulic unsealing oil pipe anchor. Background technique [0002] In the oilfield production process, the tubing anchor is an essential downhole tool. During construction, the tubing anchor is connected to the tubing string and lowered into the casing, and then pressurized into the tubing, the setting piston in the tubing anchor moves under the pressure and pushes the cone to move, and then the clamp on the tubing anchor The shoe (anchor fluke) is supported, and the supported slip is against the inner wall of the casing to anchor the tubing string on the casing. In actual production, the tubing anchor needs to be anchored at different positions twice in a set of processes. In order to meet this requirement, it is currently necessary to use the tubing anchor and lift the tubing string twice, and the operating cost is relatively high. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/04
CPCE21B23/04
Inventor 常江吴杰
Owner 大庆华油石油科技开发有限公司
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