Study on the power saving effect of involute pumping unit

Power saving effect is a main standard to judge a pumping unit's performance. The paper shows the torque factor can be adjusted through changing pumping unit structure. The peak torque of gear box crank and its torque fluctuation are obviously decreased. The paper investigates the power saving principle and optimize the structure parameters. Theoretical analysis and computing for different oil wells has been compared with field experiments, showing that the involute pumping unit meets the design specifications. The pumping unit, with obvious power saving effect of 26.51%, holds a promising prospect in the marketplace.