The products will mainly be used to the vertical well drilling tools, self-activated oscillating-rotating impact drilling tools and MWD and LWD with the functions of flow diversion

The products will mainly be used to the vertical well drilling tools, self-activated oscillating-rotating impact drilling tools and MWD and LWD with the functions of flow diversion, flush and seal of the slurry and feed back of the slurry pressure and pulse signal in the adverse working conditions of high pressure, high speed flushing of sand and slurry, high temperature, fatigue wear, gas and liquid corrosion in oil and natural gas prospecting.