The three element drive pump failure was the main reason to reduce inspection cycle of the pump. In this paper, a law of pump valve motion in one stroke was acquired through the establishment of the motion equations of the pump valve in the oil well pump, by making it as the pump valve boundary conditions and using ANSYS / LS-DYNA software, the stress state of the valve housing under the conditions of pump valve impact on the valve cover was analyzed, and as the calculation was shown, under the same conditions, the groove valve cover has the stronger impact than the extended grooved valve housing. The inspection cycle of groove valve housing was 457 days shorter than the extended grooved valve cover according to the theory of the fatigue life, therefore, the extended valve housing can effectively extend the check period.

Rational and efficient use of the sucker rod vibration energy is one of the effective ways of pumping unit energy saving. The vibration mechanics as the basis for establishing three-dimensional coupled vibration mathematical model of sucker rod-tubing-liquid column, and using difference solution to reproduce vibration process within one stroke of the sucker rod string, on this basis, analyzing the variable stiffness sucker rod string to the impact of the polished rod load and the pump stroke, and gaining reasonable parameters of the sucker rod string vibration energy, and combining with the working conditions of the sucker rod string to establish the match conditions of the sucker rod string liquid column incentive and polished rod incentive, and proposing the condition of pump to generate over-stroke to provide the theoretical basis for rational use of the sucker rod string vibration energy.