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Packer capable of releasing negative pressure control deblocking in air cavity

A negative pressure control, air cavity technology, applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems of high construction cost and complex process, and achieve the goal of reducing construction cost and simplifying construction process. Effect

Pending Publication Date: 2021-02-02
大庆泰泽机械加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing construction technology, when the packer is set, it is necessary to use a large pump truck to apply high pressure to the center pipe to achieve the setting pressure required to cut the setting pin. The disadvantage of this technology is that the process is complicated and the construction cost is high

Method used

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  • Packer capable of releasing negative pressure control deblocking in air cavity
  • Packer capable of releasing negative pressure control deblocking in air cavity
  • Packer capable of releasing negative pressure control deblocking in air cavity

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the present invention includes a rubber cartridge 2, a central pipe 1 and a setting piston 9, the rubber cartridge 2 and the setting piston 9 are all set on the outside of the central pipe 1, and the side wall of the central pipe 1 is processed with a liquid hole 10, The position of the setting piston 9 on the central pipe 1 is between the rubber cartridge 2 and the liquid passage hole 10 . The above is a conventional structure in the prior art, and will not be repeated here.

[0021] The innovation of the present invention lies in that it also includes a sealing seat 6 , a push ring 3 and a push sleeve 12 , and both the sealing seat 6 and the push ring 3 are sleeved on the outside of the central tube 1 .

[0022] The sealing seat 6 is fixedly connected to the central tube 1, and the push sleeve 12 is installed on the outside of the sealing seat 6 and is in sliding and sealing cooperation with the sealing seat 6. The upper end of the push sle...

Embodiment 2

[0031] This embodiment adds the following technical features on the basis of Embodiment 1:

[0032] Such as figure 2 As shown, the sealing seat 6 is processed with another axial through hole 5 for communicating with the upper and lower sides of the sealing seat 6 , and a soluble sealing plug 11 is inserted in the axial through hole 5 .

Embodiment 3

[0034] This embodiment adds the following technical features on the basis of Embodiment 1:

[0035] Such as Figure 4 As shown, the electromagnetic coil 16 and the armature 14 are respectively provided with an engaging A portion 18 and an engaging B portion 17 that can be engaged with each other. After the armature 14 is attracted by electromagnetic force, the engaging A portion 18 and the engaging B portion 17, so that the armature 14 cannot press the sealing plug 7 into the axial through hole 5 again. With this design, after the packer is unsealed, the inner space of the air chamber 13 is always in communication with the outside world through the axial through hole 5, thereby preventing the packer from being unable to be disassembled.

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PUM

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Abstract

The invention discloses a packer capable of releasing negative pressure control deblocking in an air cavity, and relates to the technical field of oil field downhole tools. The packer comprises a rubber sleeve, a central pipe and a setting piston, wherein the rubber sleeve and the setting piston sleeve the outer side of the central pipe, a liquid passing hole is machined in the side wall of the central pipe, the position of the setting piston on the central pipe is positioned between the rubber sleeve and the liquid passing hole, the packer further comprises a sealing base, a push ring and a push sleeve, the sealing base and the push ring are arranged on the outer side of the central pipe in a sleeving mode, the push ring is located between the rubber sleeve and the sealing base, the pushsleeve is installed on the outer side of the sealing base and is in sliding sealing fit with the sealing base, the upper end of the push sleeve abuts against the push ring, and the lower end of the push sleeve sleeves the outer side of the upper end of the setting piston and is sealed with the setting piston through a sealing ring. Compared with the prior art, the setting pressure required for shearing off a setting pin can be achieved without using a large pump truck during underground installation, so that the construction process is simplified, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of downhole tools in oil fields, and in particular relates to a packer for releasing negative pressure in an air cavity and controlling unsealing. Background technique [0002] In oil production engineering, a packer refers to an elastic sealing element (rubber cartridge), which uses the elastic sealing element to seal off the annular space between various sizes of pipe strings and wellbore and between pipe strings, and isolate the production layer. Downhole tools to control production (injection) fluid and protect casing. The structure of a common packer includes a central tube, a rubber tube and a setting piston. Both the rubber tube and the setting piston are set on the outside of the central tube. When setting, the pressure from the central tube passes through the liquid hole on the central tube to reach the One end of the setting piston, under the action of the pressure difference between the upper and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/128
CPCE21B33/1285
Inventor 王添跃王文龙
Owner 大庆泰泽机械加工有限公司