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High-pressure slurry wall-protection method and device

A kind of mud retaining wall and mud technology, which is applied in shaft equipment, earthwork drilling, wellbore lining, etc. It can solve problems such as locking, affecting the progress of drilling construction, and stuck drill, so as to prevent hole collapse and shrinkage, and save the supply of clean water and sewage discharge, to ensure the effect of normal drilling

Active Publication Date: 2018-01-12
HENAN POLYTECHNIC UNIV
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Problems solved by technology

However, when drilling in soft rock and soft coal formations, hole collapse and diameter shrinkage often occur, and various drilling accidents such as drill sticking, buried drilling, and locked drill pipes occur, which seriously affect the progress of drilling construction and are difficult to deal with. Improper drilling will also result in scrapped drilling, loss of drilling tools, and economic losses

Method used

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  • High-pressure slurry wall-protection method and device
  • High-pressure slurry wall-protection method and device
  • High-pressure slurry wall-protection method and device

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0017] Such as figure 1 with figure 2 As shown, a high-pressure mud wall protection device includes a pulping machine 1, a mud pump 2, a drilling rig 3, a hollow drill pipe 8, a drill pipe check valve 18, a screw motor 23, a drill bit 24, a blowout preventer 4, and a tee 5 , orifice pipe 6, mud settling tank 9, overflow valve 10, steel plate mud pool 11, filter screen 12; described pulp machine 1 is connected with described steel plate mud pool 11 by pipeline, is used for mud is transported to steel plate mud pool The mud pump 2 is connected to the steel plate mud pool 11 through the first pipeline 13, and one end of the first pipeline 13 is connected to the mud pump 2, and the other end is connected to the bottom of the steel plate mud pool 11. The mud is supplied through the first pipeline through the ...

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Abstract

The invention belongs to the field of mine drilling and relates to a high-pressure slurry wall-protection method and device. In order to solve the technical problems in the prior art, the downhole high-pressure slurry wall-protection method is designed, and the method is conducted based on utilizing the downhole high-pressure slurry wall-protection device. The downhole high-pressure slurry wall-protection comprises a slurry circulation system formed by a slurry making machine, a slurry pump, a drilling machine, a hollow drill rod, a drill rod check valve, a blowout preventer, a three-way joint, a hole opening pipe, a slurry depositing tank, an overflow valve, a steel plate slurry pool, a filter net and the like. Slurry can be supplied circularly through the downhole high-pressure slurry wall-protection device, and thus water is saved. The content of sand in the slurry can be decreased by 98% or above through settlement of the slurry depositing tank. According to the downhole high-pressure slurry wall-protection method, positive pressure can be generated on the hole wall of a drilled hole, and a layer of slurry film is formed on the hole wall, so that hole collapse and hole shrinkage of the drilled hole are prevented, and normal drilling is guaranteed.

Description

technical field [0001] The invention belongs to the field of mine drilling, and relates to a high-pressure mud wall protection device and method. Background technique [0002] As the mining depth of underground mines continues to increase, the country pays more and more attention to mine safety production, and requires advanced drilling and drilling in areas threatened by water hazards or mines with complex hydrogeological conditions, coal and gas outburst mines, and mining. Detection, grouting reinforcement or gas drainage to prevent water damage and gas accidents. Under normal circumstances, the existing drilling equipment can meet the construction requirements. However, when drilling in soft rock and soft coal formations, hole collapse and diameter shrinkage often occur, and various drilling accidents such as drill sticking, buried drilling, and locked drill pipes occur, which seriously affect the progress of drilling construction and are difficult to deal with. Imprope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
Inventor 陈新明韩晓龙李振华焦华喆韩振宇孙冠东刘子璐严少洋王树飞刘晨生
Owner HENAN POLYTECHNIC UNIV
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