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An expandable packer capable of pressurization and setting and its application method

A packer and expansion technology, applied in the direction of sealing/isolation, earthwork drilling, wellbore/well components, etc., can solve the problems of ineffective setting and inability to meet the requirements of delamination, so as to prevent interlayer fluid Interference with pressure, good expansion effect, and pressure increase effect

Active Publication Date: 2020-02-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional expandable packer cannot be effectively set under low choke pressure difference, and cannot meet the requirement of delamination

Method used

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  • An expandable packer capable of pressurization and setting and its application method
  • An expandable packer capable of pressurization and setting and its application method
  • An expandable packer capable of pressurization and setting and its application method

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Embodiment Construction

[0028] 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 creative efforts fall within the protection scope of the present invention.

[0029] Such as Figure 1-2 As shown, an expandable packer that can be pressurized and set according to the present invention includes an upper connector 1 of the packer, an upper retaining bowl 2 is screwed under the upper connector 1, and the inside of the upper retaining bowl 2 is connected with glue The upper end of the barrel 3 is screwed, and the inside of the rubber barrel 3 is sleeved with an outer central tube 4, and a number of pressure guide holes are eve...

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Abstract

The invention discloses a pressurized set expansion packer and an application method of the pressurized set expansion packer, and belongs to the field of expansion packers. The expansion packer includes an upper connector which is connected with an upper block bowl. The upper block bowl is connected with a rubber barrel, and the rubber barrel is internally sleeved with an outer central tube. The lower end of the rubber barrel is connected with a lower block bowl, and the lower end of the lower block bowl is connected with an outer barrel, and the lower part of the outer barrel is connected with a lower connector. An inner center tube is arranged between the upper connector and the lower connector. Setting fluid is arranged between the outer center tube and the inner center tube. A drain hole is arranged on the inner center tube. A pressurizing part is arranged between the outer barrel and the inner center tube. Since the expansion packer is provided with the pressurizing part, the pressure intensity of the setting fluid can be increased by several times compared with that in the internal center tube, and the problem that an existing expansion packer can not set effectively under low throttle pressure difference is solved. So the pressurized set expansion packer can meet the setting requirement under low throttle pressure difference to achieve a better layering effect, prevent interlayer fluid and pressure interference, and improve the efficiency of oil well production.

Description

technical field [0001] The invention relates to the field of expandable packers, in particular to an expandable packer that can be pressurized and set and a method for using the same. Background technique [0002] The implementation of polymer flooding and water injection well profile control in oilfield development is an effective means to solve the development contradiction between water flooding reservoirs and improve the effect of water flooding development. It has been widely used in the development of major water flooding oilfields. However, during the implementation process, the polymer solution and profile control and plugging agent injected into the well are mostly high-viscosity solution systems prepared by high-molecular polymers. If the throttling pressure difference is too large during the injection process, the long-chain structure of the polymer molecules will be destroyed. As a result, the viscosity of the solution system is greatly reduced, which affects the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/128
CPCE21B33/1285
Inventor 孙德旭王增林孙金峰罗杨隋旭强姜忠新毛福生王鹏飞张凯谭云贤
Owner CHINA PETROLEUM & CHEM CORP
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