Field application demonstrates that the management level and economic efficiency of the screw pump production system would be improved by using the control chart.
现场应用表明，根据螺杆泵油井工况宏观控制图，可提高螺杆泵采油系统管理水平及经济效益。
2
The regularity can be applied to optimize the design of screw pumps and improve its working efficiency.
利用此规律可对螺杆泵进行优化设计，提高其工作效率。
3
Usually, the fullest efficiency of screw propeller is 75% with the rest energy lost in the way of whirlpool.