Hydraulic Lift Systems require surface equipment to clean, condition and pressurize power fluid to operate the downhole jet or reciprocating piston pump. The well produced oil or water is used as the power fluid.

Cleaning the power fluid is accomplished by the used of cyclone separators, properly sized to remove all solids over 25 microns. The fluid is pressurized by a multiplex pump to typical injection pressure of 2,000 to 4,000 psig. The pump can be driven by electric motor, multicylinder diesel or natural gas engine.

Return well fluid and exhaust power fluid is typically brought to a vessel unit for conditioning to allow an acceptable division of gas, oil and water. Vessel design pressure is dependent on flowline pressure to the processing unit, typically in the 150 to 300 psig range. All Weatherford vessels are built to the latest ASME pressure codes and carry the ASME code stamp. In addition, the vessels are all internally coated for protection from corrosive well fluids.

Weatherford offers a complete line of Oilmaster Unidraulic® Surface Units. These systems are oilfield skid mounted and specifically engineered and designed to provide optimum performance under the most rigorous conditions. Most Unidraulic systems are a two-skid package, to be installed in a side-by-side arrangement at single well locations. One skid contains the multiplex pump, its prime mover and various controls. The second skid contains the vessel unit. A range of horsepower, commonly 60 to 300, is computer selected to match the required lift conditions of the well. Larger units, up to 625 horsepower, can be supplied for large volume wells.