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Coalbed drilling hole inside directional dissevering method

An internal orientation and coal seam technology, applied in safety devices, earthwork drilling, wellbore/well components, etc., can solve the problem of increasing the permeability of coal walls, the roof and floor cannot be sealed and drained, and the coal seam water injection area is large, etc. problems, to achieve the effects of not damaging the sealing effect, promoting the amount of gas gushing out, and convenient operation

Inactive Publication Date: 2008-02-13
杜志刚
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AI Technical Summary

Problems solved by technology

[0002] Through a comprehensive search at home and abroad, the latest technology for increasing the amount of gas drained from coal seam boreholes in coal mines is: "The method of increasing the amount of gas drained from coal seam boreholes in coal mines" patent application number 200710084545.0, and its disadvantage is that it uses compressed air to release gas instantly Due to the impact of high pressure, the range of increased permeability of the coal wall is small and the depth is shallow, so that the increased amount of gas drainage is small. In the past, the water injection area of ​​the coal seam was large, and the damage to the roof and floor caused the cracks to communicate with the main road space and could not be sealed for drainage.

Method used

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  • Coalbed drilling hole inside directional dissevering method

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Embodiment Construction

[0017] Now take accompanying drawing 1 as an example: put the drilled high-pressure pipe (3) with the end cut hole (4) into the final hole position of the drilled hole, then open the valve (7), and the high-pressure liquid (5) will rush to the The hole wall of the borehole is directionally split to form cracks (6), and the high-pressure pipeline is controlled to rotate and move, and the end cut hole (4) is also rotated and moved together, thereby realizing the directional split device inside the coal seam borehole.

[0018] Now take accompanying drawing 2 as an example: put the drilled high-pressure pipe (2) with the end cut hole (3) into the final hole position of the drilled hole, then open the valve (6), and the high-pressure liquid (4) will rush to the The hole wall of the borehole is directionally split to form a crack (5), and the high-pressure pipeline is controlled to rotate and move, and the end cut hole (3) is also rotated and moved together, thereby realizing the dir...

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Abstract

A directional separation method inside a drill hole of a coal seam is characterized in that a high-pressure pump is connected with an energy storage tank; after a switch of a high-pressure pipe of the drill hole is turned on, the liquid inside the energy storage tank will impact a coal (rock) wall of the drill hole via the high-pressure pipe and an end cutting hole, and cracks will be made by the impact; when the pressure pipe rotates and moves, and drives the end cutting hole to rotate and move together, so as to realize the directional cutting inside the drill hole of the coal seam.

Description

Technical field: [0001] The utility model relates to an internal directional splitting device for coal seam drilling, which belongs to the field of coal mining, and is especially suitable for increasing the amount of gas extracted from coal seam drilling in coal mines. Background technique: [0002] Through a comprehensive search at home and abroad, the latest technology for increasing the amount of gas drained from coal seam boreholes in coal mines is: "The method of increasing the amount of gas drained from coal seam boreholes in coal mines" patent application number 200710084545.0, and its disadvantage is that it uses compressed air to release gas instantly Due to the impact of high pressure, the range of increased permeability of the coal wall is small and the depth is shallow, so that the increased amount of gas drainage is small. In the past, the water injection area of ​​the coal seam was large, and the damage to the roof and floor caused the cracks to communicate with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/26
Inventor 杜志刚
Owner 杜志刚
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