The paper systematically generalizes the present state of research and application of drilling fluids in CCSD,non-ferrous exploration,oil drilling,coal exploration,water well drilling and geothermal well,and progress of waste mud treatment.

Drilling fluids is one of the main factors influencing the yield of water well.

Testing method of the impacting force of drilling pump valve in the course of valve closing;

In view of the characteristic of severe erosion and abrasion in the drilling pump valve,the flow field of the play of it by FLUENT was simulated and computed in this paper.

According to the impact fatigue failure appeared in drilling pump valve,the mechanical characteristic and effect degree of the maximum stress concentration spot when the impact of pump valve happens were mainly studied,hence a non-impact working condition of drilling pump valve based on the effects of stress concentration was put forward.

Material Selection and processing of small gear shaft in drilling pump;

Application of demodulated resonance and fuzzy distinguishing technique to fault diagnosis of bearings in drilling pump;