Unlock instant, AI-driven research and patent intelligence for your innovation.

Packer

A technology of packer and hydraulic cylinder, which is applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as casing deformation, difficult control of setting force, and well wall damage, etc., and achieve long-term The effect of long service life, simple manufacturing process, and reduced production cost

Active Publication Date: 2017-07-07
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though some packers can achieve multiple setting, 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Packer
  • Packer
  • Packer

Examples

Experimental program
Comparison scheme
Effect test

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. The inner cylinder liner 12 and the outer cylinder liner 13 are fixedly arranged, and the hydraulic cylinder 11 can slide relative to the inner cylinder liner 12 and the outer cylinder liner 13 . An expandable and retractable setting cylinder 20 is also provided on the outer side of the outer cylinder liner 13 , and in one embodiment, the setting cylinder 20 is a rubber sealing cylinder. An expansion space 21 is formed between the outer cylinder liner 13 and the setting cylinder 20, and the fi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 are setting cylinders that can expand and retract to enable 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 circumferentially, so that the packer can automatically set And unblock. This kind of packer can not only realize multiple setting, but also has controllable setting force and 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 oilfield development, especially in horizontal wells, it is usually necessary to use one string to achieve multiple setting and multiple unsealing. The packer is the most commonly used tool for setting and unsealing. Generally, packers can be divided into self-sealing type, compression type, wedge type, expansion type, combined type, etc. according to the structure; according to the setting principle, they can be divided into : 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 setting. During setting, the seal material expands; during desealing, the lifting string unlocks the lock ring. In order to prevent ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/126
Inventor 王连生李颖任家萍孙建芳徐婷王元庆林长志阚淑华宋传真曹立迎杨森邹敏
Owner CHINA PETROLEUM & CHEM CORP