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Gas extraction hole drilling hole sealing technology in manner of two-end self-blocking and under pressure

A technology of sealing holes under pressure and gas drainage, which is applied in earthwork drilling, sealing/isolation, wellbore/well components, etc., which can solve the problems of poor sealing effect, inability to carry pressure, complicated process, etc., and achieve sealing Improved pore efficiency, low cost, and ease of use

Inactive Publication Date: 2014-08-06
HENAN COAL CHEM IND GROUP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve technical problems such as the traditional sealing process itself cannot be under pressure, the sealing effect is poor, the efficiency is low, and the process is complicated, so as to provide a gas drainage drilling sealing process and a drilling internal sealing device

Method used

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  • Gas extraction hole drilling hole sealing technology in manner of two-end self-blocking and under pressure
  • Gas extraction hole drilling hole sealing technology in manner of two-end self-blocking and under pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: as figure 1 As shown, a kind of self-plugging and pressure-sealing process at both ends of a gas drainage borehole uses a hole-sealing device inside the borehole, adopts self-plugging at both ends of the pressure-sealing bag grouting and sealing method, and uses a sealing material Conduct drainage drilling and sealing. The length of the sealing section of bedding drilling is 5-8m.

[0018] The drilling inner hole sealing device is mainly composed of self-blocking pressure sealing bag 1 with both ends, sealing pipe for coal mine, grouting pipe 3, flower pipe and steel window screen.

[0019] Drill holes for gas drainage during construction; wrap the head of the first flower tube 10 with a steel window screen and tie it firmly with cable ties 5; Top; Insert the grouting pipe 3 to the middle of the sealing section of the self-plugging pressure-sealing pouch 1 at both ends; use cable ties, 12# iron wire or wide transparent tape to seal the hole The pouch 1,...

Embodiment 2

[0033] Embodiment 2: as figure 2 As shown, a kind of self-plugging and pressure-sealing process at both ends of a gas drainage borehole uses a hole-sealing device inside the borehole, adopts self-plugging at both ends of the pressure-sealing bag grouting and sealing method, and uses a sealing material Conduct drainage drilling and sealing. The length of the sealing section of drilling through layers shall not be less than 5m.

[0034] The hole sealing device and the hole sealing material are the same as those in Example 1.

[0035] Layer-through drilling and sealing process: a. Layer-through drilling and sealing adopts self-plugging at both ends, pressure sealing, bag-type grouting and sealing, and new sealing materials.

[0036] b. After the drilling construction is completed, confirm the drilling depth on the rock layer 7 and the length of the coal hole section on the coal seam 2, sweep the holes with compressed air, and seal the holes and pump them in time.

[0037] c. ...

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Abstract

The invention discloses a gas extraction hole drilling hole sealing technology in a manner of two-end self-blocking and under pressure. A hole drilling inner hole sealing device is utilized, the manner that a two-end self-blocking hole sealing bag grouts and seals a hole under pressure is adopted, and a hole sealing material is used for extracting gas, drilling the hole and sealing the hole; the length of a bedding hole drilling hole sealing section is 5-8 m, and the length of a perforative-layer hole drilling hole sealing section is not less than 5 m. With adoption of the technology, the hole sealing cost is low, the hole sealing air impermeability is high, the use is simple, convenient and rapid, positioning hole sealing can be realized, and the gas extraction hole drilling hole sealing efficiency is greatly improved; the traditional hole sealing technology is innovated in the terms of the hole sealing material, the hole sealing device and the hole sealing parameters.

Description

technical field [0001] The invention belongs to the technical field of underground gas drainage in coal mines, and in particular relates to a gas drainage drilling sealing process and a drilling inner sealing device. Background technique [0002] In recent years, mine mining has developed to the deep, and the mining depth of some mines has exceeded 1000 m. With the increase of mining depth, the gas content of coal seams gradually increases, and the gas pressure of coal seams increases. Some low-gas mines or high-gas mines are gradually upgraded to outburst mines, resulting in frequent gas accidents and has become a bottleneck restricting the improvement of coal mine safety. Therefore, gas control is the primary task of the current coal mine safety work, and this problem needs to be solved urgently. [0003] The twelve-character policy of my country's gas control "pumping first, monitoring and monitoring, and wind to determine production" reflects the objective laws and basi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
Inventor 李伍成陶云奇李宁杨程涛付毅李宗耀陈新建王峰
Owner HENAN COAL CHEM IND GROUP INST
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