The rotary percussion drilling technology have the advantage to raise the hard rock well drilling speed effectively, prevent the borehole deviation in the hard rock or the complicated geologic strata.

The pneumatic percussion rotary drilling is mainly operated in the area where liquid is hardly or not permitted to be used as the circular medium.

Hydraulic rotary-percussion drilling is one of five important drilling techniques recently. Itstechnique nucleus is hydro-percussive tools.