Drilling and hole-flushing integrated device for coal mine gas extraction

Abstract

The invention discloses a drilling and hole-flushing integrated device for coal mine gas extraction. Switching between drilling and hole flushing can be conveniently realized, when a high-pressure hole flushing pipe is connected with a hole flushing high-pressure jet liquid supply pump, and a high-pressure hole flushing medium can pass through an adjustment protection assembly to enable the frontend of a high-pressure nozzle to extend out of the front end of a drill bit, so that the high-pressure medium can be sprayed for hole flushing; when a drilling motor performs the drilling operation, the high-pressure nozzle can be hidden in the inner cavity of the drill bit through the adjustment protection assembly under the function of external pressure, so that the high-pressure nozzle is protected, the efficiency of drilling and hole flushing is effectively improved, and the drilling and hole flushing operations of coal mine gas extraction are facilitated; and drilling is carried out, a cooling liquid can be introduced into the drill bit to protect the drill bit, and the drilling capacity is improved, high-pressure hole flushing is simple and convenient, the operation can be completedonly need to connect the high-pressure hole flushing pipe in a threaded mode, switching is simple and fast, and fast drilling and hole flushing operations of a coal mine are realized.

Description

technical field [0001] The invention relates to the technical field of gas drainage, in particular to an integrated device for coal mine gas drainage using drilling and hole washing. Background technique [0002] Gas accidents are one of the most serious disasters in the safety production of coal mines in my country. When the amount of gas gushing out in coal mines is large and it is difficult to dilute and remove it by ventilation, the method of drilling and drainage must be adopted to remove the gas and reduce the burden of ventilation. And drilling must use drilling equipment. At this stage, the commonly used drilling equipment in my country first drills holes, then extends the extraction pipe into the borehole, and uses the extraction pipe to perform extraction operations. However, for some soft rocks, the problem of borehole blockage often occurs during drainage. Once the borehole is blocked, it is difficult to clean it only by using the drill bit. This requires the use...

AI Technical Summary

Problems solved by technology

However, for some soft rocks, the problem of borehole blockage often occurs during drainage. Once the borehole is blocked, it is difficult to clean it only by using the drill bit. This requires the use of hole washing equipment for hole washing

However, the current hole washing equipment and drilling equipment are generally installed separately, and there are many inconveniences in use. For example, in the hole washing process, when hard rock is blocked, the cleaning efficiency of the hole washing method is low, and It is difficult to clean soft rock or slag only by using drilling equipment, which leads to low efficiency of hole washing and drilling, and affects the efficiency of gas drainage

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