STAGE OF SUBMERSIBLE SCREW OIL WELL PUMP WITH SUBMERSIBLE DRIVE Russian patent published in 2018 - IPC F04B17/00 F04B53/14 F04B53/18 E21B43/12 

FIELD: engines and pumps; oil and gas industry.

SUBSTANCE: invention relates to a submersible oil well pump assembly and, in particular, to a pump unit equipped with a downhole reverse torque converter. Device contains a control cabinet with a switching system, an immersion motor, a torque converter. There is also a downhole oil piston pump. Control cabinet is arranged to be located at the wellhead and to connect its switching system to the submersible motor. In this case, the torque converter is designed to be reciprocated with the switching system of the control cabinet. This system is designed for automatic switching in accordance with specified load values. Engine is a submersible synchronous motor with a permanent magnet with an asynchronous start. Said torque converter is provided with a compression spring disposed at the ends of the drive bar during downward travel and with a compression spring in the upward direction. Housing of the lower oil storage chamber at the lower end of the torque converter is made in the form of an elastomer cylinder. Both ends of the lower oil storage chamber are hermetically connected to the body of the torque converter to form the outer and inner cavities.

EFFECT: higher reliability.

6 cl, 2 dwg