Potter Drilling of California uses jets of superheated fluid to break through granite five times faster than traditional techniques, which don't do well against hardrock types.
The rotary percussion drilling technology have the advantage to raise the hardrock well drilling speed effectively, prevent the borehole deviation in the hardrock or the complicated geologic strata.
Hose bit can be divided into cutter teeth and cone teeth, cone teeth for weathering of soft rock strata, and permafrost, cutter teeth used for drillinghard bedrock.