SUBMERSIBLE PUMP SYSTEM (VERSIONS), AND PUMPING METHOD Russian patent published in 2011 - IPC F04B43/06 

FIELD: engines and pumps.

SUBSTANCE: submersible pump system includes piston movable in axial direction relative to the housing, the position of which changes between the extended and retracted position. Pump valve connected to the housing can be in the first position in which the pump valve supplies the working fluid so that piston moves to extended position, and in the second position in which the pump valve supplied the working fluid so that the piston moves to retracted position. Pump system also includes upper stop that is connected to pump valve so that pump valve moves to the first position when upper stop contacts with the piston in retracted position. Pump system also includes lower stop that is connected to pump valve so that pump valve moves to the second position when lower stop contacts with the piston in extended position.

EFFECT: reducing the cost of the plant and increasing the operating reliability.

27 cl, 7 dwg