Progressive Cavity Pumps

Subsurface progressing-cavity pumps run on a string of sucker rods and turned from surface, used as an artificial-lift method to produce oil from the wellbore. The rotor is rod-string driven while the stator is anchored in the production tubing.

Configurations that place the prime mover downhole near the pump, eliminating the rod string and surface drive. They suit deviated, horizontal, or deep wells where rod-string rotation would cause excessive wear or torque loss.

Wellhead-mounted drive assemblies that transmit rotary torque to the rod string and carry the axial load of the rod and fluid column. They incorporate a thrust bearing, stuffing box, and braking or backspin-control system.

Above-ground PCP units used to move heavy oil, emulsions, and gas-liquid multiphase streams through gathering and processing systems. Their sealed progressing cavities handle high viscosity and entrained gas with low pulsation.

Continuous or coupled rod strings that connect the surface or downhole drive to the pump rotor. High-torque designs are specified to withstand the rotational and tensile loads of deep heavy-oil PCP installations.

The two core hydraulic elements: a precision-machined helical metal rotor and an elastomer-lined stator whose internal double-helix forms the sealing cavities. Geometry, lobe ratio, and elastomer compound are matched to fluid, temperature, and aromatics content.

Variable-speed drive packages, including permanent-magnet motors, that regulate pump rotational speed to match well inflow. Speed control optimizes volumetric efficiency and reduces stator wear over the pump life.