The drill bit is the main part of drilling equipment, and its main function is to break the rock and form the borehole. The drill bit is one of the main drilling equipment, and the size and shape of the drill bit should be different according to the working environment and regional environment. When drilling coal wells, the drill bit should be selected reasonably and scientifically based on specific needs and specific design plans. In the specific drilling work of scientific selection of drill bits, reasonable determination of drilling fluid, so as to improve the efficiency and quality of coal drilling, so that coal drilling can better play its own value, to promote the development of the coal industry to make certain contributions.

In the process of coal mine drilling, the drill bit is the main tool to break the rock, and the borehole is formed by breaking the rock with the drill bit. The formation of a borehole and the length of time it takes are not only related to the characteristics of the rocks in the formation being drilled and the performance of the drill bit itself, but also to the degree of mutual matching between the drill bit and the formation. The reasonable selection of drill bits plays an important role in improving the drilling speed and reducing the overall cost of drilling. It plays a very important role in the selection of drilling process, especially it has a great influence on the drilling quality, drilling speed and drilling cost.

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