It is the key study how to make sure the pressure distribution of liquid in the pump barrel and to study the pump valve-ball's movement to improve the systematic efficiency.

The development and application of the closed negative pressure oil well pump;

Study of the method for calculating the clearance leakage between the plunger and the barrel of oil well pump;

The measurement of dynamic parameter of the oil well pump;

The development of oil pump thread twist moment measure and control system;

Research on intelligent saving technology of oil pump;

Determination of optimal jumping height of fixed valves of sucker rod pumps and its field application;

Optimization design method to determine submergence depth of sucker rod pump;

The present status of application and research and development prospects of sucker rod pumps;