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The working principle of an impregnated coring drill bit is mainly to use the hardness and wear resistance of diamond to break rocks. During the drilling process, the diamond particles continuously grind and break the rocks. At the same time, the matrix of the drill bit will gradually wear out, so that the diamond particles will continuously expose new cutting edges, thereby maintaining the drilling efficiency of the drill bit.
Specifically, the working principle of an impregnated coring drill bit can be divided into the following steps:
Drilling starts: Install the impregnated coring drill bit on the drill rod, and then insert the drill rod into the borehole to start drilling.
Diamond particles grind rocks: When the drill bit rotates, the diamond particles come into contact with the surface of the rock and produce a grinding effect. Since the hardness of diamond is very high, it can easily grind the rock and break the rock into small pieces.
Matrix wear: As drilling proceeds, the matrix of the drill bit will also gradually wear out. The matrix wears faster than the diamond particles, so the diamond particles will gradually expose new cutting edges.
Diamond grains come out: When the diamond grains reveal new cutting edges, they continue to grind the rock, thus maintaining the drilling efficiency of the drill bit.
Drilling end: When the drilling reaches the predetermined depth, the drilling is stopped and the impregnated coring drill bit is removed from the borehole.