A coiled tubing string is generally used to apply the treatment, which involves running to depth while pumping high-pressure nitrogen gas.
挠性管柱一般用来实施处理作业，它包括下至一定深度并泵入高压氮气。
2
The control rod string which is consisted of pumping rod and controller is tripped into the release string.
抽油杆与控制器组成的控制杆柱下入到丢手管柱内，控制杆柱上部与杆式泵的进油孔相连。
3
Taking the rod string as the object of study, a method of computing pumping stroke and speed of walking beam pumping units for slant straight wells is also presented.