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A four-stage compression packer suitable for high temperature and high pressure construction conditions

A compression packer, high temperature and high pressure technology, applied in sealing/isolation, wellbore/well components, earthwork drilling and production, etc., can solve the problem that the packer cannot meet the construction requirements, and achieve strong shear resistance , Strong practicability, and the effect of large seat sealing force

Active Publication Date: 2016-08-17
SICHUAN WELDON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a four-stage compression packer suitable for high temperature and high pressure construction conditions, mainly to solve the problem that existing packers cannot meet the construction requirements under high temperature and high pressure conditions

Method used

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  • A four-stage compression packer suitable for high temperature and high pressure construction conditions
  • A four-stage compression packer suitable for high temperature and high pressure construction conditions
  • A four-stage compression packer suitable for high temperature and high pressure construction conditions

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Embodiment

[0025] Such as Figure 1~3 As shown, the present invention includes a packer main body 1, a rubber cartridge protection mechanism and an auxiliary sealing device. The main body 1 of the packer is the same as the existing packer, and mainly consists of an upper joint 2, a rubber cylinder 6, a central pipe 7, a cylinder liner 11, a first-stage piston 15, a second-stage piston 16, and a third-stage piston. 17. The fourth-stage piston 18, the shear pin 19, the lower joint 20 and at least two sealing rings 13 are formed, such as figure 1 shown. When the central pressure is applied, the four-stage piston simultaneously pushes up the compression rubber cylinder 6 to realize the seat seal, and since there is no locking mechanism, the packer can realize automatic unsealing under the action of the elastic force of the rubber cylinder 6 after the pressure is released .

[0026] The rubber cartridge 6 is used to seal the packer when it is compressed, so as to ensure the pressure differ...

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Abstract

The invention discloses a four-stage compression type packer applicable to high-temperature and high-pressure construction conditions, and solves the problem that the existing packer is difficult to meet the construction requirements under the high-temperature and high-pressure condition. The four-stage compression type packer comprises a packer main body provided with a center pipe, a rubber tube, a cylinder sleeve and at least two sealing rings, wherein the rubber tube and the cylinder sleeve are respectively covered outside the center pipe, all sealing rings are respectively arranged in the cylinder sleeve, the four-stage compression type packer also comprises a rubber tube protection mechanism and an auxiliary sealing device, the rubber tube protection mechanism is covered outside the center pipe and is used for ensuring the sealing performance of the rubber tube when the packer is compressed, and the auxiliary sealing device is arranged in the cylinder sleeve and is used for assisting the sealing rings for realizing the complete sealing on the cylinder sleeve under the high-temperature and high-pressure construction condition. The four-stage compression type packer has the advantages that the structure is reasonable, the rubber tube can be protected, in addition, the sealing performance of the rubber tube and the sealing rings can be protected, the high-temperature and high-pressure construction requirements can be met, and in addition, the service life of the packer can be prolonged, so the four-stage compression type packer is suitable for being popularized and applied.

Description

technical field [0001] The invention relates to a packer, in particular to a four-stage compression packer suitable for high temperature and high pressure construction conditions. Background technique [0002] Packer is a key tool for downhole oil production in oilfields, and is widely used in oilfield separate injection, layered reconstruction, fracturing, layered oil recovery, mechanical pipeline water plugging and other operational purposes. [0003] Rubber cartridge and sealing ring are the main components of the packer, and their sealing performance directly affects the normal use effect and service life of the packer, so they play a decisive role in the packer. When the rubber cartridge bears a high pressure difference in a high temperature environment, the shoulder of the rubber cartridge is easily crushed, making the seal of the rubber cartridge invalid; the sealing ring is easily deformed under high temperature and high pressure, and cannot fill the gap between the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127
Inventor 何伟卿显君易建国
Owner SICHUAN WELDON CHEM
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