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Packer

A packer and hydraulic cylinder technology, applied in the directions of sealing/packing, wellbore/well components, earth-moving drilling, etc. Simple, easy-to-use effects

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though some packers can achieve multiple setting seals, the setting force is not easy to control, which often causes casing deformation or well wall damage, burying hidden dangers for the next operation

Method used

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Experimental program
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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing.

[0031] figure 1 A packer 10 according to the invention is shown schematically. The packer 10 includes a hydraulic cylinder 11, an inner cylinder liner 12 arranged inside the hydraulic cylinder 11, and an outer cylinder liner 13 arranged outside the hydraulic cylinder 11, and a liquid containing space 14 is formed inside the inner cylinder liner 12 for accommodating hydraulic fluid. An expanding and retracting sealing cylinder 20 is provided outside the outer cylinder liner 13 , and an expansion space 21 is formed between the outer cylinder liner 13 and the sealing cylinder 20 . The fixing method of the sealing cylinder 20 will be described below. In one embodiment, the sealing cylinder 20 is a rubber sealing cylinder.

[0032] On the circumferential side walls of the hydraulic cylinder 11, the inner cylinder liner 12 and the outer cylinder liner 13, through holes 15, 16,...

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PUM

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Abstract

The invention relates to a packer, which includes a hydraulic cylinder. An inner cylinder liner and an outer cylinder liner are respectively arranged on the inner side and the outer side of the hydraulic cylinder. A liquid containing space is formed inside the inner cylinder liner. There is an inflatable and retractable seating cylinder for setting and unsealing of the packer. The upstream end of the hydraulic cylinder is provided with a force tank for bearing hydraulic pressure, and the downstream end of the hydraulic cylinder is provided with an elastic member so that the hydraulic cylinder can move up and down. A wave-shaped guide rail is set on the inner cylinder liner, and a guide rod used in conjunction with the wave-shaped guide rail is set on the hydraulic cylinder, so that the hydraulic cylinder can move up and down while also rotating in the circumferential direction, so that the packer can automatically set and seal And unblock. This kind of packer can not only realize multiple sealing, but also the sealing force is controllable, and it is more convenient to use.

Description

technical field [0001] The present invention relates to an oilfield development tool, more particularly to a packer. Background technique [0002] In the process of oil field development, especially in horizontal wells, it is usually necessary to use one string to achieve multiple times of sealing and unsealing. The packer is the most commonly used tool for sealing and unsealing. Generally, the packer can be divided into self-sealing type, compression type, wedging type, expansion type, combined type, etc. according to the sealing principle. : Lifting column type, rotating column type, self-sealing type, thermal expansion type, etc. [0003] Generally, packers cannot be set multiple times in oil wells. For example, hydraulic packers use hydraulic cylinders to squeeze sealing materials to achieve set seals. During setting, the seal material expands; during desealing, the lifting string unlocks the lock ring. In order to prevent midway sealing before setting, it is necessar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12
Inventor 王连生李颖阚淑华任家萍王元庆林长志李孟涛孙建芳曹丽丽宋文芳
Owner CHINA PETROLEUM & CHEM CORP
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