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A power-assisted expansion sealing system for liner hanger

A technology of expanding sealing and boosting spring, applied in the directions of sealing/isolation, wellbore/well components, earth-moving drilling, etc., can solve the problems of loss of compaction force, loss of sealing ability, and decreased sealing ability.

Active Publication Date: 2019-10-25
TAICANG UNION TECH PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After swelling, the sealing rubber will gradually become stable due to deformation as time goes by, but at the same time, part of the compression force will be lost due to deformation, resulting in a decrease in sealing ability, or even loss of sealing ability

Method used

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  • A power-assisted expansion sealing system for liner hanger
  • A power-assisted expansion sealing system for liner hanger
  • A power-assisted expansion sealing system for liner hanger

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] Such as figure 1 As shown, a liner hanger provided by the embodiment of the present application may include: a sealing liner 1 , a mandrel tube 2 pierced in the sealing liner 1 , and an O-shaped joint sleeved on the mandrel tube 2 . Ring 3, the mandrel tenon 4 arranged adjacent to the O-ring, is located on the opposite side of the mandrel tenon 4 relative to the O-ring and is connected to the packer main body locking ring seat 5 fitted on the mandrel tube 2, opposite to the O-ring The tenon 4 of the mandrel is located on the opposite side of the locking ring seat 5 of the main body of the packer and is seq...

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Abstract

The invention provides a cone auxiliary spring for a drilling liner hanger. The cone auxiliary spring is connected to a core shaft pipe arranged in the drilling liner hanger in a sleeved mode so as to be used for compensating for pressing force, lost in the deformation stabilization tending period, of an expanding sealing rubber combination under the situation that a packer main body locking short ring and the core shaft pipe (2) are locked in one way. The cone auxiliary spring has the advantages that after expanding sealing, pressing force is further increased, and the situations that the sealing capacity is reduced and even the isolation capacity is lost are prevented.

Description

technical field [0001] The invention belongs to the field of power-assisted expansion sealing in liner pipe hangers, and more particularly relates to a power-assisted expansion sealing system for liner pipe hangers. Background technique [0002] In the petroleum industry, it is very convenient and efficient to use the liner hanger to complete the well completion operation. The expansion seal is a crucial link in setting the liner hanger, which will directly affect the success of the well completion operation. After swelling, the sealing rubber will gradually become stable due to deformation as time goes by, but at the same time, part of the compression force will be lost due to deformation, resulting in a decrease in sealing ability, or even loss of sealing ability. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a power-assisted expansion sealing system for a liner hanger, which c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/10E21B33/12
CPCE21B33/10E21B33/12
Inventor 陈琦陈敬涛汤晓冬曹强王成
Owner TAICANG UNION TECH PRECISION MACHINERY