Downhole Screw PCP Progressive Cavity Pump Surface Drive OHANG TECH

Cavity Pump

Progressive cavity pump system (PC pump) consists of down-hole screw pump / surface drive assembly and electric control assembly. As a new technology of oil extraction PC pump has such advantages as broad adaptability / high efficiency / energy conservation and investment saving. PC pump is especially advantageous when using for crude oil of high viscosity / high sandiness / high gassy and other special features.

Rotary motion is transmitted to down-hole by the sucker rod from surface drive assembly, to drive the screw pump operation. The screw pump consists of two parts: rotor and stator. The high strength, anticorrosion coated rotor is the only moving part of screw pump. Stator is a kind of tube with elastic synthetic rubber molded inside. A variety of elastomeric is available for different applications.

When rotor rotates in the stator, a series of sealed cavities are formed and these cavities move axially from the intake end to the displacement side. When one cavity disappears at the displacement side, a new cavity is formed at the intake side. Trough continuous formation, motion and disappearance of these cavities, fluid is then brought to the surface. Owing to the unique features, the surface drive and PC pump finds wide applications in oil fields.

Surface drive assembly parameter

Down-hole Progressive Cavity Pump Specification

Remark: Hollow rotor is available for all above types, and the parameters of pump as flow rate and head can be customized.