Compensator for water injection pipe

A compensator and water injection pipe technology, which can be used in the production of fluids, wellbore/well components, and earth-moving drilling, etc., can solve problems such as packer leakage, and achieve the effects of reducing leakage, reducing production costs, and improving operational reliability.

Active Publication Date: 2013-05-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide a water injection pipe compensator to solve the problem of packer leakage caused by pipe string expansion and contraction

Method used

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  • Compensator for water injection pipe

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Experimental program
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Effect test

Embodiment Construction

[0022] A water injection pipe compensator of the present invention, the water injection pipe compensator includes: a backstop part, including a backstop ring and a thrust sleeve; a locking part, including a lock tube core, a lock tube, a lock collar and a lock claw spring; and The control part includes a lock tube pin and a shear pin; the inner side and the outer side of the lower end of an upper joint are respectively connected to the lock tube core and the thrust sleeve, the thrust sleeve is fixedly connected to the lock tube, and the lock tube core and the thrust sleeve are respectively connected. The locking tube is respectively connected to the inner side and the outer side of the locking collar; the locking tube presses the locking claw spring onto the locking collar, and the bottom of the locking collar is fixedly connected to a central tube, so that The central tube is slidably sleeved with a suspension short, and the bottom end of the central tube is fixed with a bevel...

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Abstract

The invention provides a compensator for a water injection pipe. The compensator for the water injection pipe comprises a retreat stopping part, a locking part and a control part, wherein the retreat stopping part comprises a retreat stopping ring and a thrusting cover; the locking part comprises a locking pipe core, a locking pipe, a locking coupling and a locking pawl spring; the control part comprises a locking pipe dowel and a shearing-off dowel; the inner side and the outer side of the lower end of an upper joint are respectively connected with the pipe locking core and the thrusting cover, the thrusting cover is fixedly connected with the locking pipe, and the locking pipe core and the locking pipe are respectively connected with the inner side and the outer side of the locking coupling; the locking pipe compacts the locking pawl spring onto the locking coupling, the bottom of the locking coupling is fixedly connected with a center pipe, the center pipe can be in externally sliding cover with a suspension short joint, and the bottom end of the center pipe is fixedly provided with an inclination guiding joint; and the upper end of the suspension short joint is fixedly connected with the locking pawl spring, the lower end of the suspension short joint is fixedly connected with an outer pipe, and the bottom of the outer pipe is connected with a lower joint.

Description

technical field [0001] The invention belongs to a tool applied to the layered water injection technology in the field of oil and gas field development. Injection pipe compensator for column reliability. Background technique [0002] Many oilfields are complex fault-block oilfields, for example, with oil layers buried deep (2200-3700m), high-temperature (88°C-135°C), many layers (the average number of layers per well is 30 layers), long well intervals (average The well interval is 400 meters), and the oil field is characterized by strong reservoir heterogeneity. The development of layered water injection has significantly improved the water injection effect of the oilfield, but due to the influence of factors such as pressure fluctuations and temperature changes in the pipe string caused by water injection or stop injection, the pipe string will be elongated or shortened, making the unsupported hydraulic compression The packer creeps up and down, which reduces the sealabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20
Inventor 马文天王立军蔡勤增李辉袁武段美宇
Owner PETROCHINA CO LTD
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