Progressing Cavity Pump Systems Our Progressing Cavity Pumping (PCP) Systems are designed for use in both oil production and dewatering applications where the economics of production demand efficiency, reliability and low life-cycle cost from the production equipment. The progressing cavity principle is ideally suited to the demands of pumping downhole fluids. At the heart of the downhole PC pump lay the pumping elements, consisting of a hard steel rotor, usually in the form of a single external helix of circular section, and a stator with the internal form of a two-start helix. The stator is manufactured from a resilient, abrasion-resistant elastomer bonded inside an alloy steel tube that is selected to be compatible with the specified well fluids. When the rotor is placed inside the stator a series of sealed cavities are formed.