Drilling hole inside directional dissevering method

A technology of internal orientation and drilling axis, which is applied in earthwork drilling, wellbore/well components, gas discharge, etc., and can solve the problem of increased permeability of coal walls, roof and floor that cannot be sealed and drained, and coal seam water injection area Large and other problems, to achieve the effect of not destroying the sealing effect, the effect is outstanding, and the effect of promoting the amount of gas gushing out

Inactive Publication Date: 2008-02-13
杜志刚
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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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  • Drilling hole inside directional dissevering method

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Embodiment Construction

[0014] Now take the accompanying drawings as an example: extend the high-pressure pipeline (1) with the end cut hole (2) into the final hole position of the drill hole (5), then open the valve, and the high-pressure liquid (3) rushes to the drill hole ( 5) of the hole wall, and directional split to form cracks (4), control the rotation and movement of the high-pressure pipeline (1), and the end cut hole (2) also rotates and moves together, thereby realizing the method of directional splitting inside the borehole.

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Abstract

A directional cutting method inside a drill hole is characterized in that a high-pressure pipe is arranged inside the drill hole; an end cutting-hole is arranged at the high-pressure pipe of the final drill hole position; when the high-pressure liquid ejects from the cutting-hole, cracks will be made by the liquid around the cutting hole to control the rotation and movement of the high-pressure pipe, and the cutting hole will rotate and move as well, so as to realize the directional cutting inside the drill hole.

Description

Technical field: [0001] The method for directional splitting inside a borehole belongs to the field of coal mining, and is particularly suitable for drilling coal seam holes in coal mines to increase the amount of gas extracted. 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 the main road space and could not be sea...

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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