Plunger actuated pumping system

A submersible pump comprising:

• a pump body operable to be disposed within tubing within a well;
• a pump chamber disposed within the pump body and having an inlet and an outlet, wherein the inlet is in fluid communication with the well;
• a diaphragm disposed within said pump chamber, wherein said diaphragm forms a boundary between said pump chamber and a diaphragm chamber;
• a piston moveably disposed within the diaphragm chamber;
• and
• a relief valve in fluid communication with the diaphragm chamber, wherein said relief valve limits the differential pressure between the diaphragm chamber and the pump chamber.

A well pumping system comprising:

• a hydraulic fluid supply located at the surface and operable to provide a first fluid pressure differential;
• hydraulic tubing extending into the well from the hydraulic fluid supply to a submersible pump disposed within the well;
• a pressure intensifier coupled to said hydraulic tubing and operable to apply the first fluid pressure differential to a piston;
• a diaphragm chamber containing a volume of hydraulic fluid, wherein a portion of the piston is disposed within said diaphragm chamber;
• and
• a diaphragm forming a flexible barrier between said diaphragm chamber and a pump chamber in fluid communication with the well.

A well pumping method comprising:

• disposing a hydraulic submersible pump within the well, wherein said hydraulic submersible pump comprises a diaphragm pump comprising a piston moveably disposed within a diaphragm chamber;
• connecting hydraulic tubing from the hydraulic submersible pump to a fluid supply at the surface;
• and
• supplying hydraulic fluid from the surface to move the piston relative to the diaphragm chamber.