Because of the reasons for the actual drilling conditions, or without the correct operation of the drill bits, the DTH Drill will often form a wear pattern. If the drill is not judged early and regrinding before its wear cycle, it will result in poor performance or early failure, and the effective maintenance of the DTH Drill can be in a certain range. Reduce the effect loss in degree.
The main forms of expression are as follows:
One, the tail pipe and the end of the impact
It is sure that the tail tube is fractured. It is usually caused by a straight line deviation caused by wear of pistons or cylinders. Lack of lubrication leads to extraction and water corrosion.
Two. The head of a bit
The wear of the bottom spline groove often occurs at the abrasive bottom.
In highly abrasive formations, the wear of drill bits is usually faster than that of alloy teeth.
The main failure mode of DTH bit is collapse and crack, while wear is a secondary failure form. The crackle and crack are mainly caused by unreasonable carburizing process, deep infiltration layer, high carbon concentration, large quenching tissue, low hardness of matrix and excessive austenite in the surface after quenching.