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A Rapidly Retractable Expansion Packer Rubber Cartridge

A packer and rubber cartridge technology, which is applied in the field of expanding packer rubber cartridges, can solve problems such as damage to the rubber cartridge, seal failure, and the coil spring does not have radial deformation, and achieves the ability to avoid self-setting and pressure-bearing sealing. strong effect

Active Publication Date: 2021-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above published patent is a compression packer rubber sleeve. During the field implementation, the sealing process of the compression type rubber sleeve is to complete the sealing of the oil sleeve annulus by the combined deformation of the rubber sleeve’s axial shortening and radial outward expansion, but the patent’s The helical spring obviously does not have the function of radial deformation, and it is easy to cause the rubber tube body and the helical spring to peel off when it is implemented in the field, and the damage to the rubber tube leads to the failure of the seal, which has obvious technical defects in field application

Method used

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  • A Rapidly Retractable Expansion Packer Rubber Cartridge
  • A Rapidly Retractable Expansion Packer Rubber Cartridge
  • A Rapidly Retractable Expansion Packer Rubber Cartridge

Examples

Experimental program
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Effect test

Embodiment 1

[0030] according to Figure 6 As shown, the present invention can implement a hydraulically controlled expansion packer. The rubber cartridge 3 of the present invention is installed on the central pipe 10, and a sealing joint 12 is installed on the upper and lower sides. The sealing joint 12 is provided with a connecting hydraulic control pipeline. The threaded thread and the hydraulic hole 11 are connected to the pipe string through the threaded thread of the upper joint 9 on the hydraulically controlled expansion packer and the threaded thread at the lower end of the central pipe 10 and lowered into the well implementation section. . Then hydraulic pressure is applied to the hydraulic control pipeline on the ground, and the hydraulic pressure impels the upper piston 4 and the lower piston 6 to move upward and downward, and the rubber sleeve 3 expands outward to realize the annular air seal of the oil sleeve. When the hydraulic pressure is removed, the upper piston 4 and the...

Embodiment 2

[0032] according to Figure 7 As shown, a hydraulic expansion packer for fracturing wells implemented by the present invention, the rubber cartridge of the present invention is installed on the central pipe 10, and a sealing joint 12 is installed on the upper and lower sides, and the middle of the central pipe 10 is provided with a pressure transmission hole 1001 , when it is implemented on the oil-water well site, the threaded buckle of the upper joint 9 on the hydraulic expansion packer and the threaded buckle at the lower end of the center pipe 10 are connected to the pipe string and lowered into the well implementation section. Then pump hydraulic pressure in the oil pipe on the ground, and the hydraulic pressure impels the upper piston 4 and the lower piston 6 to move up and down, and the rubber tube 3 expands outward to realize the oil sleeve annulus seal. When the hydraulic pressure is removed, the upper piston 4 and the lower piston 6 move under the action of the upper...

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Abstract

The invention discloses a rapidly retractable expansion packer rubber sleeve, which includes a rubber sleeve, a bracket assembly, and a bracket return drive mechanism, the upper end of the rubber sleeve is connected to a vulcanized upper joint, and the lower end is connected to a vulcanized lower joint. The bracket return drive mechanism includes an upper bracket return drive mechanism and a lower bracket return drive mechanism. The bracket assembly includes at least three brackets that are arranged inside the rubber tube at an even angle. The brackets include a skeleton plate, a base rod 1. An oblique rod, the skeleton plate is vulcanized and inlaid in the rubber tube, the oblique rod is located in the inner cavity of the rubber tube, the oblique rod includes a symmetrical upper slope section and a lower slope section, and the middle part of the oblique rod is connected to the skeleton plate through the base rod . The rubber cartridge rebounds and recovers under its own restoring force, and at the same time, the piston in the closed chamber pushes the piston under the pressure in the chamber and the action of the spring, which assists and accelerates the retraction of the rubber cartridge, which improves the unsealing ability of the packer, protects the rubber cartridge, and improves the sealing performance of the rubber cartridge. cartridge reuse reliability.

Description

technical field [0001] The invention relates to the field of oil well production, in particular to a rapidly retractable expansion packer rubber sleeve. Background technique [0002] With the demand for fine reservoir development, higher requirements are put forward for the downhole interlayer isolation and operation technology of oil and water wells. At present, due to the needs of well washing and downhole supporting equipment maintenance, the average annual setting and unsealing operations are 3 to 4 times The above, and because of the downhole oil-casing pressure difference and the interlayer pressure difference, the rubber sleeve of the expansion packer failed to unseal, or the rubber sleeve retracted slowly, or the outer wall of the rubber sleeve scraped against the casing due to incomplete unsealing. The possibility of reusing the rubber cartridge is destroyed. [0003] Application number: 201610287713.X, publication date 2016-07-20 discloses a packer rubber cartridg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/128E21B33/127
CPCE21B33/127E21B33/128
Inventor 李德忠钱钦张雷任从坤张剑车传睿田俊刘艳霞张福涛丛娟
Owner CHINA PETROLEUM & CHEM CORP