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Annular packing valve and completion pipe string

An annulus and isolation valve technology, applied in sealing/isolation, wellbore/well components, wellbore/well valve devices, etc., can solve problems such as failure to open oil production channels

Pending Publication Date: 2020-12-18
东营市瑞丰石油技术发展有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the first aspect of the present invention is to provide an annulus isolation valve, which can solve the technical problems provided by the prior art that the isolation packer cannot be set and the oil production channel can be opened by pressure only by running the pipe string once

Method used

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  • Annular packing valve and completion pipe string
  • Annular packing valve and completion pipe string
  • Annular packing valve and completion pipe string

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Such as Figure 1-Figure 4 As shown, the annulus isolation valve 200 provided in this embodiment includes a first central pipe 202, a first sealing seat 209, a first sealing body 210 and a first piston, and the first sealing seat 209 is fixed to the first central pipe 202 connection, the first piston is connected to the first central tube 202 in a destructible manner through a seal maintaining member, the first piston and the first sealing seat 209 are located on the outside of the first central tube 202, and the first piston is located on the first sealing seat 209 Above, the first sealing body 210 is located below the first sealing seat 209, and the first piston is also provided with a suction part 205;

[0083] When the first piston and the first central tube 202 are fixedly arranged, the first piston is used to receive the first upward force of the first liquid located below the first sealing seat 209, and the suction part 205 applies an upward force to the first se...

Embodiment 2

[0108] Such as Figure 5 As shown, the completion string provided in this embodiment includes the annulus isolation valve 200 in the first embodiment described above.

[0109] Since the completion string provided in this aspect includes any one of the above-mentioned annulus isolation valves 200 , it has the technical effect of any one of the above-mentioned annulus isolation valves 200 , which will not be repeated here.

[0110] The completion string also includes a first outer sheath 213, a screen unit 100 and a water control unit 300. The screen unit 100 is connected to the first central pipe 202 through the first upper joint 201, and the water control unit 300 is connected to the first central pipe. 202 is connected to the external thread at the lower end, and the first outer sheath 213 is arranged on the outside of the annulus isolation valve 200 .

[0111] Specifically, refer to Figure 1-Figure 5 , the action principle of this embodiment is as follows:

[0112] Conne...

Embodiment 3

[0116] Such as Figure 6-Figure 10 As shown, the differences between this embodiment and Embodiment 1 are:

[0117] The annulus isolation valve of this embodiment includes a second central pipe 402, and the sealing member includes a second piston 403. The second piston 403 is fixedly connected to the second central pipe 402 through a seal maintaining member in a destructible manner. The second piston 403 Located on the outside of the second central tube 402, when the second piston 403 and the second central tube 402 are fixedly arranged, the second piston 403 isolates the space above the second piston 403 from the space below the second piston 403, and the second piston 403 for receiving the first upward force from the first liquid located below the second piston 403;

[0118] The sealing control assembly includes an unlocking assembly, the unlocking assembly includes a locking body 405 and an unlocking driver 406, the locking body 405 is connected to the second piston 403 in...

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Abstract

The invention belongs to the technical field of completion of oil exploitation, and relates to an annular packing valve and a completion pipe string. The annular packing valve comprises a sealing maintaining part, a sealing control assembly and a sealing part, wherein the sealing maintaining part is used for maintaining the sealing state of the sealing part, and the sealing control assembly is used for enabling the sealing part to be separated from an area sealed by the sealing part in the sealing state after the sealing maintaining part is damaged. The annular packing valve and the completionpipe string solve the technical problem that the action time efficiency of an isolation packer is poor in a horizontal well segmented water control completion pipe string, and achieve the technical effects that the isolation packer can be set and an oil production channel can be opened through pressure only by tripping in the pipe string once.

Description

technical field [0001] The invention belongs to the technical field of well completion in oil exploitation, and in particular relates to an annulus isolation valve and a well completion pipe string. Background technique [0002] Open-hole horizontal wells are completed with staged water control for oil production, and water control screens and oil-water-swellable packers are often used to achieve layered water control. Oil and water swellable packers are expensive and have poor timeliness. However, if ordinary open-hole isolation packers are used instead of oil-water-swellable packers, the entire pipe string needs to be sealed, and the channel needs to be opened during later production. [0003] Therefore, it is urgent to design an annulus spacer ring valve to connect with the water control screen. When the open hole packer needs to be set, the annulus spacer valve can seal off the water control valve hole of the water control screen to achieve isolation. When oil producti...

Claims

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Application Information

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IPC IPC(8): E21B33/12E21B34/06
CPCE21B33/12E21B34/06
Inventor 梁作愿武洪鑫孔洋张玉涛
Owner 东营市瑞丰石油技术发展有限责任公司
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