Hydraulic expansion packer

An expansion packer technology, applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of poor groundwater layer effect, prone to blowout, equipment scrapping, etc., to reduce wear and tear, Prevent severe expansion and deformation, prevent blowout effect

Active Publication Date: 2020-07-28
大庆市地油石油机械有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a hydraulically expandable packer, which has the advantages that the expansion chambers of the rubber sleeve do not affect each other, improves the service life, and ensures the use effect in the harsh oil well environment. In the event of a blowout, the effect is poor and easily damaged when sealing the groundwater layer

Method used

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] see Figure 1-5 , a hydraulic expandable packer, comprising a collar 1, the lower part of the inner surface of the collar 1 is fixedly fitted with a central tube 2, the lower part of the outer surface of the central tube 2 is fixedly fitted with a valve joint 3, and the outer surface of the central tube 2 The middle part and the same as the valve joint 3 are fixed with a rubber sleeve 4, and the middle part of the outer surface of the rubber sleeve 4 is...

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Abstract

The invention relates to the technical field of oilfield cementing equipment, and discloses a hydraulic expansion packer. The hydraulic expansion packer comprises a coupling, and a center tube is fixedly sleeved on the lower portion of the inner surface of the coupling. According to the hydraulic expansion packer, T-shaped grooves and T-shaped keys are formed to be matched for installation, the T-shaped keys are installed to plug sections of a first rubber sleeve into the T-shaped grooves, one expansion cavity between the first rubber sleeve and a rubber cylinder is separated, and each partition expansion cavity is provided with a communication hole in a matched manner; liquid injected from a pressure injection channel is injected into each expansion cavity through a hole plugging channeland the communication holes, when the hydraulic pressure reaches a certain degree, the pressure injection channel is sealed to stop injecting the liquid, at this time, the liquid is injected into thehole plugging channel, and the pressure is greater than the pressure at the pressure injection channel, so that a rubber partition plate deforms to the communication holes and blocks the communicationholes, and the first rubber sleeve expand in sections after liquid injection to avoid mutual influence. After one abrasion, the whole equipment still has a good sealing effect, and the well sprayingof petroleum at the bottom of a well is prevented.

Description

technical field [0001] The invention relates to the technical field of oil field cementing equipment, in particular to a hydraulic expansion packer. Background technique [0002] The hydraulically expandable packer adopts a hydraulically expandable structure and is mainly used in complex oil, gas, and water well completion projects to achieve downhole isolation and bridge plugging for various purposes. It has a significant effect on the quality of well cementing and completion. It is proved by practical application that this tool is easy to operate and has wide adaptability. It is an important completion tool. [0003] The hydraulic expandable packer is mainly composed of a valve system assembly, a rubber cartridge assembly, a center pipe, and a short connection. When the displacing rubber plug runs to the spoiler, a seal is formed in the casing, and the liquid enters the locking valve through the liquid inlet hole of the valve system. When the pressure reaches the set valu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127
CPCE21B33/127E21B33/1277
Inventor 刘超
Owner 大庆市地油石油机械有限公司
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