Hole protecting and sealing method for gas extraction drill hole with one hole and one hole
The invention relates to a hole protecting and sealing method for a gas extraction drill hole in a one-hole one-strategy mode, and belongs to the field of gas control. The method mainly comprises the following steps that firstly, in the drill withdrawal process of a drill bit provided with a signal...
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Main Authors | , , , , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
07.03.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The invention relates to a hole protecting and sealing method for a gas extraction drill hole in a one-hole one-strategy mode, and belongs to the field of gas control. The method mainly comprises the following steps that firstly, in the drill withdrawal process of a drill bit provided with a signal collecting and transmitting device, stress and strain parameters of hole wall surrounding rock in a drill hole and other parameters reflecting the shape of the hole wall of the drill hole are fed back in real time; a digital signal-image conversion technology is used for forming a drilling hole-forming visual image including drilling hole wall integrity, drilling hole instability collapse distribution and the like, and the position of a drilling hole plugging section baffle, the position and the length of a grouting section, the length of a plugging section and the position and the length of a lower screen pipe are automatically designed according to the image; and secondly, targeted hole protection and hole sealin |
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Bibliography: | Application Number: CN202211556331 |