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;

To meet test requirement for larger power and ultra-high pressure mud pump(52 MPa),a new AC VFD test stand is designed and developed to upgrade the testing capability.

After carefully researched the actual problem, we designed the power switch system for the mud pump electric power system of 70DS.

When using the mud pump in the oilfield,the high pressure mud often damages the valve covers due to erosion or stab action,such result in mud ejecting leakage,which makes the mud pump stop working for repairing.

A bimetal drill pump liner with outer layer of carbon steel and inner layer of high chromium cast iron 17CrMoCu was manufactured by centrifugal casting.