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Permanent packer capable of being released

A packer, permanent technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of production operation limitations, the packer cannot rotate the pipe string, etc., to prevent premature setting , Avoid the risk of setting land ahead of time, and the effect of setting and anchoring will continue to be effective.

Active Publication Date: 2016-11-09
荆州市赛瑞能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Packers are an indispensable isolation tool for oil and gas well development operations. Conventional hydraulic removable packers are not suitable for large-aperture well completions and multi-layer composite packer completions due to their small internal diameters. However, the packer with a large internal diameter often cannot rotate the pipe string, and the production operation is limited

Method used

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  • Permanent packer capable of being released
  • Permanent packer capable of being released

Examples

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Effect test

Embodiment Construction

[0023] The disposable permanent packer includes a center pipe 1 , a setting sleeve 2 , a locking ring 3 , a bushing 4 , a connecting sleeve 5 , a rubber sleeve 6 and slips 7 . One end of the center pipe 1 is threadedly provided with a lower joint 8 , and the center pipe 1 and the lower joint 8 are fixed by a hexagon socket set screw 9 . An upper vertebral body 10 and a lower vertebral body 11 are symmetrically arranged on the central tube 1 on one side of the lower joint 8 . The lower vertebral body 11 is screwed to the central pipe 1 . Slips 7 are installed between the upper vertebral body 10 and the lower vertebral body 11 through the slip sheath 12 and the leaf spring 13 . The slips 7 are bi-directional slips, the tooth direction of which is that the tooth shape of the left end faces downward, and the tooth shape of the right end faces upward; there is a leaf spring 13 between each slip 7 and the slip sheath 12, and is embedded as a whole. Go to the window of the slip she...

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Abstract

The invention relates to a permanent packer capable of being released and belongs to the field of underground operation tools for oil and gas wells. The permanent packer comprises a central pipe, a setting sleeve, a lock ring, a lining, a connecting sleeve, a rubber cylinder and a slip. A lower connector is installed at one end of the central pipe in a threaded mode. An upper conical body and a lower conical body are symmetrically arranged on the portion, on one side of the lower connector, of the central pipe. The slip is installed between the upper conical body and the lower conical body through a slip protection sleeve and a leaf spring. The other end of the central pipe is sleeved with the setting sleeve. The portion, on one side of the setting sleeve, of the central pipe is provided with the lining. The lining is in threaded connection with the setting sleeve. The slip of the packer is pressed by the leaf spring when entering a well and only stretches out when being pressed by the conical bodies under the action of hydraulic pressure, and the advanced setting risk of a conventional packer is effectively avoided. Firm anchorage can be guaranteed through the slip of the packer, the downward tooth shape can bear loads from the upper portion of the packer, and the upward tooth shape can bear loads from the lower portion of the packer. The slip is specially designed to be located below the rubber cylinder and used for blocking scraps, and the situation that the slip is jammed by the scraps during operation is avoided.

Description

technical field [0001] The invention relates to a disposable permanent packer, which belongs to the field of downhole operation tools for oil and gas wells. Background technique [0002] Packers are an indispensable isolation tool for oil and gas well development operations. Conventional hydraulic removable packers are not suitable for large-aperture well completions and multi-layer composite packer completions due to their small internal diameters. However, the packer with a large internal diameter often cannot rotate the pipe string, and the production operation is limited. Contents of the invention [0003] The purpose of the present invention is to provide a well structure suitable for deep wells, ultra-deep wells, highly inclined wells, etc., which has the advantages of high pressure bearing capacity, large internal diameter, and anti-setting in the middle. Disposable permanent packer for tubing pressure release. [0004] Technical scheme of the present invention is...

Claims

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Application Information

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IPC IPC(8): E21B33/126E21B23/01
CPCE21B23/01E21B33/1265
Inventor 张健陶风王琼马小平李荆州程市君王鲜周颖
Owner 荆州市赛瑞能源技术有限公司
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