Hydraulically actuated double-acting positive displacement pump system for producing fluids from a wellbore

Abstract

A submersible downhole pumping system is provided. The pumping system is designed so that all fluid conduits and electrical signal conduits are internalized within a pumping assembly. This design provides a substantially constant and slim profile to the pumping assembly. The pumping assembly comprises a housing that houses a power assembly, a powered actuator assembly that is operatively linked to a production fluid assembly and a central bore that extends through the pumping assembly to provide fluid communication between the power assembly and a first end of the pumping assembly. The pumping system further includes a flow distributor/connector at the first end or pump head for providing fluids' communication between the pump head and a conducting system that extends from surface to the pumping system. The communication fluids include high pressure power hydraulic fluid, low pressure exhaust hydraulic fluid and pressurized produced wellbore fluid.