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Constant pressure staged unpacking packer

A packer, constant pressure technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve problems such as early unpacking

Active Publication Date: 2016-08-24
大庆康盛石油节能科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of step-by-step unpacking packer, which solves the problem that the step-by-step unpacking packers of oil field layered water injection wells are prone to early unsealing, and realizes that the multi-stage packers are sequentially arranged from top to bottom. To achieve the purpose of hierarchical unblocking

Method used

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  • Constant pressure staged unpacking packer

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Embodiment Construction

[0011] see figure 1 , a new type of graded unsealing packer of the present invention, including an upper joint 1, an upper connecting sleeve 2, a booster piston 3, an unsealing pin 4, a central tube 5, a spring 6, a well flushing piston 7, a pressure cap 8, a sealing Ring 9, base 10, outer central tube 11, upper rubber cylinder 12, upper retaining ring 13, middle rubber cylinder 14, lower retaining ring 15, lower rubber cylinder 16, lower connecting sleeve 17, setting piston 18, snap ring sleeve 19 , Circlip seat 20, circlip 21, setting pin 22 and lower joint 23 are formed. Firstly, after installing 4 booster pistons 3 into the upper joint 1 (four hollow holes are evenly distributed along the circumference on the wall of the upper joint 1, and a booster piston 3 is installed in each hollow hole), set the upper joint 1 in the center On the tube 5, install the unsealing pin 4, insert the spring 6 into the central tube 5, and make the upper end of the spring 6 push against the l...

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Abstract

A novel classified deblocking packer is characterized by comprising an upper joint, an upper connecting sleeve, a boosting piston, a deblocking pin, a center tube, a spring, a well washing piston, a pressing cap, a sealing ring, a base, an outer center tube, an upper rubber cylinder, an upper retaining ring, a middle rubber cylinder, a lower retaining ring, a lower rubber cylinder, a lower connecting sleeve, a set packing piston, a clamp spring sleeve, a clamp spring seat, a clamp spring, a set packing pin and a lower joint. The novel classified deblocking packer has the advantages that temperature-resistant and pressure-bearing performances are excellent, the novel classified deblocking packer can be successfully tripped in an oil well, deblocking can be realized step by step from top to bottom in the oil well, and the novel classified deblocking packer can solve the problem that a conventional step-by-step deblocking packer is deblocked in advance as a deblocking pin 4 is sheared in advance due to excessive load during set packing.

Description

technical field [0001] The invention relates to a novel staged release packer, in particular to a constant pressure staged release packer. Background technique [0002] At present, the Y341 washable well packer can basically only meet the requirements of two to three layered water injection strings in the oil field, and multi-stage packers are used for multi-layer injection. In the multi-stage separate injection inspection series operation, multiple packers need to be unsealed at one time, and the unsealing force of each packer is 5-6 tons, and the unsealed force of more than three packers needs to be more than 18 tons. In addition to the gravity of the pipe string itself, it will be close to the 30-ton ultimate pulling force of the workover rig, and the on-site construction risk is relatively high. However, because the unsealing pins of conventional step-by-step unsealing packers will bear a large load during setting, the unsealing pins of the packer are likely to be cut o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/126
CPCE21B33/122
Inventor 康庆刚
Owner 大庆康盛石油节能科技开发有限公司
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