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Efficient gas extraction device based on hydraulic fracturing

A technology of gas drainage and hydraulic fracturing, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc. It can solve problems such as reduced drainage efforts, difficult gas extraction, and impact on gas drainage volume. To achieve the effect of increasing strength

Active Publication Date: 2022-04-01
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology

[0003] In the existing gas drainage device, the length of the drainage pipe is longer and the diameter of the borehole is larger when the gas drainage is performed, so that the drainage force in the drainage pipe is gradually reduced, so that the drainage pipe is separated from the drainage. It is difficult to extract the gas from the remote location of the equipment, which affects the amount of gas extraction

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  • Efficient gas extraction device based on hydraulic fracturing
  • Efficient gas extraction device based on hydraulic fracturing
  • Efficient gas extraction device based on hydraulic fracturing

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Embodiment Construction

[0042] refer to Figure 1~3 , the present invention provides a technical solution: a high-efficiency gas drainage device based on hydraulic fracturing, comprising:

[0043] The first extraction pipe 1 is preset in the borehole;

[0044] The sealing member 2 is configured in multiples and is fixed on the outer wall of the first extraction pipe 1 for sealing the fracturing position;

[0045] A drainage hole 3 is opened on the outer wall of the first drainage pipe 1 and located between the sealing members 2; and

[0046] The extraction component 4 is slidably arranged inside the first extraction pipe 1, and is used for secondary enhanced extraction of the fracturing position;

[0047] Moreover, when the first extraction pipe 1 is short, the gas is directly extracted from the extraction hole 3; Enhance extraction.

[0048] That is to say, when the first extraction pipe 1 is longer, the extraction pressure inside it decreases with the increase of the length, so it is necessary ...

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Abstract

The invention discloses an efficient gas extraction device based on hydraulic fracturing, and relates to the technical field of gas extraction, and the efficient gas extraction device comprises a first extraction pipe, a second extraction pipe and a third extraction pipe, the multiple sealing pieces are arranged, fixed to the outer wall of the first extraction pipe and used for sealing the fracturing position; the extraction hole is formed in the outer wall of the first extraction pipe and located between the sealing pieces; the extraction assembly is arranged in the first extraction pipe in a sliding mode and used for conducting secondary reinforced extraction on the cracking position; and moreover, when the first extraction pipe is short, the gas is directly extracted through the extraction hole, and when the first extraction pipe is long, the extraction assembly can be used for carrying out reinforced extraction on the fracturing position which is difficult to extract.

Description

technical field [0001] The invention relates to the technical field of gas extraction, in particular to a high-efficiency gas extraction device based on hydraulic fracturing. Background technique [0002] Hydraulic fracturing is to inject high-pressure water into the borehole, resulting in a group of longitudinal cracks passing through the borehole axis in the surrounding rock of the borehole, and then pump the gas in the borehole to the ground through the drainage equipment for utilization. [0003] In the existing gas drainage device, the length of the drainage pipe is longer and the diameter of the borehole is larger when the gas drainage is performed, so that the drainage force in the drainage pipe is gradually reduced, so that the drainage pipe is separated from the drainage. It is difficult to extract the gas located far away from the equipment, thus affecting the amount of gas extraction. [0004] In view of the above problems, the present invention provides a high-e...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B33/126
Inventor 李冲李洪涛籍志强董飞王育丰左飞闫晋峰
Owner CHINA UNIV OF MINING & TECH
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