Anti-sloughing hole reverse circulation sampling bit

A sampling drill bit and reverse circulation technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems of hindering the production efficiency of coal seam mining, restricting the development of productivity, and not being able to sample at fixed points, so as to improve the efficiency and safety of coal mine sampling , reduce gas disaster accidents, and save sampling time

Inactive Publication Date: 2015-03-25
CHINA COAL TECH ENG GRP CHONGQING RES INST
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AI Technical Summary

Problems solved by technology

The main reason lies in the drill bit. The use of this common drill bit has slow sampling speed and shallow sampling depth, which causes the problems of long sampling time and inability to sample at fixed points in the actual sampling work, which seriously hinders the production efficiency of coal seam mining and restricts the development of productivity.

Method used

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  • Anti-sloughing hole reverse circulation sampling bit
  • Anti-sloughing hole reverse circulation sampling bit

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Embodiment Construction

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] As shown in the figure, the anti-collapse hole reverse circulation sampling drill bit in this embodiment includes a drill body 1 with a cavity inside and a hollow annular injector 2 arranged in the drill body 1; To the outside, an inner layer 3, a middle layer 4 and an outer layer cutting head 5 are respectively provided. The inner layer cutting head 3 is provided with a sampling port 6, and the middle layer 4 and the outer layer cutting head 5 are provided with a The gap groove 7 of the slag, the annular injector 2 is fixedly arranged in the cavity of the drill bit body 1 and forms an annular inner cavity 8 with the inner wall of the drill bit body 1, and the sampling port 6 communicates with the hollow annular injector 2; The drill bit body 1 is correspondingly provided with an injection hole 9 , and the injection hole 9 communicat...

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Abstract

The invention discloses an anti-sloughing hole reverse circulation sampling bit comprising a bit body with an inner cavity and a hollow annular ejector arranged in the bit body. One end of the bit body is provided with inner, middle and outer cutter heads from interior to exterior, a sampling port is arranged on the inner cutter head, a clearance groove used for slagging is arranged between the middle and outer cutter heads, an annular ejector is fixedly arranged in the cavity of the bit body and forms an annular cavity with the inner wall of the bit body, and the sampling port is communicated with the hollow annular ejector; the bit body is provided with an ejecting hole correspondingly, and the ejecting hole is communicated with the annular inner cavity. The bit is easy to operate and is capable of sampling from soft and outburst seams rapidly and accurately, the sampling time is saved, the sampling depth is increased, the mine sampling efficiency and safety are improved, and the rate of gas accidents is decreased.

Description

technical field [0001] The invention belongs to the field of drill bits, in particular to an anti-collapse hole reverse circulation sampling drill bit. Background technique [0002] At present, the management of coal mine gas disasters is mainly based on regional prevention and control, supplemented by local measures. The rapid measurement technology of regional gas parameters has become an urgent problem to be solved. Therefore, deep hole sampling is the primary problem that needs to be solved. Existing deep gas sampling methods mainly include: core pipe sampling, auger drilling to connect pulverized coal, compressed air ejection sampling, etc. The sampling time of these sampling methods is generally about 30 minutes during the sampling process, and the sampling depth is about 30 minutes. About 30 meters. The main reason lies in the drill bit. The use of this common drill bit has slow sampling speed and shallow sampling depth, which causes the problems of long sampling tim...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B10/61
CPCE21B10/02E21B10/43E21B10/605E21B10/61
Inventor 文光才焦先军隆清明陈建张睿李明强王艺树吕贵春李建功张宪尚
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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