SUBMERSIBLE OIL EXTRACTION UNIT WITH PLUNGER PUMP Russian patent published in 2018 - IPC F04B47/06 

FIELD: oil and gas industry.

SUBSTANCE: submersible oil extraction unit with a plunger pump comprises a reducer, a hydro-protected electric motor, a drive shaft of which is connected to a screw of ball-screw pair located in reducer body and connected with a rod of the pump drive, which is sealed in the body and connected to the nut by means of a hollow rod embracing the screw, dampers installed in lower part of reducer body, and a control station. In the upper part of the reducer body, there is a jamming chamber, which allows to avoid pulsations of pressure when the plunger moves, before which damping devices are installed. The control station is equipped with a control unit of the stroke of the ball-screw pair nut, which ensures the unstressed reverse of the nut.

EFFECT: increased reliability of the unit operation.

2 cl, 1 dwg