PCP drive system for oil pumping 1.Direct drive,Beltless,Reverse ... Stars Progressing cavity pumps(PCP) drive system for oil pumping ---NAS-B SeriesThis system contains Control cabinet, ... blocked by sand, and apply to general oil well, viscous oil well, and sand containing well, etc. ... ,low-noise, safety, especially applying to the oil wells nearby residential district.Starting steady, without impact ...