Underground Pumping Range Research and Practice
This paper describes the extended-range device applications in the oil wells pumping relevant content to discuss the extended-range devices in the downhole process, the output rod and pump rod connecting relationship between the introduced pump barrel length of the selection method, extended range in the Underground to add a device later, washed away from the rod anti-extraction method and so on.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
J. Yang and L. J. Qiu, "Underground Pumping Range Research and Practice", Advanced Materials Research, Vols. 146-147, pp. 687-690, 2011