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Packer and well completion structure

A technology of packer and isolation piston, which is applied in the directions of sealing/packing, wellbore/well components, wellbore/well valve device, etc. Diameter and other issues

Active Publication Date: 2021-08-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent can connect multiple downhole packers through one cable. The inner diameter of the packer is large, and the cable can pass through; but the control accuracy and movement stability are poor, and forced unsealing cannot be performed.

Method used

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  • Packer and well completion structure
  • Packer and well completion structure
  • Packer and well completion structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The present invention provides a packer, such as figure 1As shown, the packer includes: a pipe body 10, a rubber sleeve 30 and an electric control valve 40; the rubber sleeve 30 is sleeved outside the pipe body 10; the pipe body 10 is provided with a piston cavity 20; the electric control valve 40 is arranged on the pipe body 10. The electric control valve 40 communicates with the piston cavity 20 and the tube cavity 11 of the tube body respectively, and is used to control the on-off between the piston cavity 20 and the tube cavity 11 of the tube body; the piston cavity 20 is provided with an isolation piston 21, The pressure liquid in the lumen 11 of the tube body can enter the piston chamber 20 through the electric control valve 40 to push the isolation piston 21 to move, and the isolation piston 21 drives the outer diameter of the rubber cartridge 30 to expand outward. The electric control valve 40 can be a normally open valve or a normally closed valve. Preferably,...

Embodiment 2

[0075] The present invention provides a well completion structure, such as Figure 5 As shown, the well completion structure includes: tubing 2; at least one above-mentioned packer 1 arranged along the tubing 2; production distribution device 3, and distribution devices 3 are provided on both sides of the packer 1 respectively.

[0076] In this well completion structure, the surface pump truck is used to pressurize the oil pipe 2, and the pressure liquid in the oil pipe 2 is used to provide the driving force for setting, and the electric control valve 40 is used to control the setting, and the packer is omitted The motor and other power components are installed in the main body of the packer 1, which simplifies the structure of the packer 1, helps to reduce the space occupied by the mechanical parts in the packer 1, facilitates the realization of a larger inner diameter, and helps to improve the reliability of the control .

[0077] In one embodiment, as Figure 5 As shown, ...

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Abstract

The invention provides a packer and a well completion structure. The packer comprises a pipe body, a rubber sleeve and an electric control valve; the pipe body is sleeved with the rubber sleeve; the pipe body is provided with a piston cavity; the electric control valve is arranged on the pipe body, communicates with the piston cavity and a pipe cavity of the pipe body and is used for controlling connection and disconnection between the piston cavity and the pipe cavity of the pipe body; and an isolation piston is arranged in the piston cavity, pressure liquid in the pipe cavity of the pipe body can enter the piston cavity through the electric control valve to push the isolation piston to move, and the isolation piston drives the outer diameter of the rubber sleeve to expand outwards. The packer has a large inner drift diameter, a plurality of packers can be conveniently used in a matched mode, the control structure is simple, and the control reliability is improved.

Description

technical field [0001] The invention relates to downhole flow control tools, in particular to a packer and well completion structure. Background technique [0002] The packer is an important tool for oil and gas field exploitation. Its main function is to isolate the stratum and carry out layering operation technology to increase the production of the oil field. Compared with conventional packers, electronically controlled packers can control the setting and unsealing of packers from the ground through electric control, and can be used repeatedly. etc. have great advantages. [0003] Patent CN201510607804.2 introduces an electric packer. The setting method uses a microcontroller to control the rotation of the executive motor, so that the hydraulic oil pushes the setting piston to squeeze the packer rubber tube to achieve setting; unsealing also uses control The reverse rotation of the motor is implemented to make the hydraulic oil flow in the opposite direction, and the se...

Claims

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Application Information

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IPC IPC(8): E21B33/126E21B34/06E21B34/16
CPCE21B33/126E21B34/066E21B34/16Y02E10/10
Inventor 张卫平沈泽俊钱杰张国文廖成龙
Owner PETROCHINA CO LTD
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