Cyclone type jetting drill bit

Abstract

The invention discloses a cyclone type jetting drill bit. The drill bit comprises a drill bit body with a hollow cavity, wherein the middle of the end part of the drill bit body is provided with a sampling port communicated with the hollow cavity, the end part of the drill bit body is provided with a cutting tool bit used for drilling and sampling, the position on the wall of the drill bit body, which is close to the cutting tool bit, is provided with an eddy-flow jetting hole communicated with the hollow cavity, and the central line of the eddy-flow jetting hole and the axis of the drill bit body are mutually staggered in the space. According to the cyclone type jetting drill bit disclosed by the invention, coal dust is pressed into a sampling passage by jetting out rotary compressed air so as to achieve the aim of quickly and accurately carrying out the operation of sampling; and moreover, the sampling time can be saved, the sampling time is reduced to about 2 to 5 minutes, the increase of the sampling depth reaches more than 100 meters, the working efficiency and the safety of the sampling of a coal mine are enhanced, and the disaster accident of gas is lowered.

Description

technical field [0001] The invention belongs to the field of drill bits, in particular to a cyclone jet 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 to be solved; the existing deep gas sampling methods mainly include: Core tube sampling, auger drilling into the orifice to receive pulverized coal, compressed air injection 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 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 time and inability to sample at fixed points in ...

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;

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