Analysis of Pump Efficiency and Feed Flow Under the Condition of Flexible Rate

Abstract

In this paper, a flexible method of optimizing the velocity of plunger is presented by selecting important oil well production parameters through orthogonal test and combining the oil well parameters and the structural parameters of the pump barrel. In order to explore the influence of the motion rate of the optimized flexible plunger on the pump efficiency, the motion law curves of the plunger before and after the optimization were compared, and the pump efficiency before and after the optimization was theoretically analyzed. The flow rate and pump efficiency of the pump before and after optimization were simulated by the model. Finally, the pumping unit experimental system is used to test the pumping pump fluid production before and after optimization. The results show that the pump efficiency under the optimized flexible rate is 3.7% higher than that before the optimization without considering other factors. The model simulation analysis shows that the mass flow rate of the pump in a single swabbing period under the condition of optimized flexible rate is increased, and the pump efficiency is increased by 4.9% compared with that before optimization. The experimental results of the pumping unit experimental system show that the fluid yield under the optimized flexible rate is higher than that before the optimization, and the maximum increase is 4.1%. The experimental results are consistent with the theoretical analysis results.