SUBMERSIBLE OIL PRODUCTION UNIT Russian patent published in 2021 - IPC F04B47/00 

FIELD: oil production equipment.

SUBSTANCE: invention relates to oil production equipment, can be used to lift well fluid and improve the reliability of the submersible oil production unit, by increasing the oil-filled volume of the hydromechanical drive, reducing the pulsations of the elastic membrane, as well as reducing the cyclic load on the dynamic units of the roller-screw drive. The submersible oil production unit consists of a plunger pump, the rod of which is sealed in its housing, and a hydromechanical drive, including an oil-filled housing, a roller-screw drive of the "screw-nut" type, a perforated hollow rod covering the screw of the roller-screw drive, connected to the piston pump rod, and placed during its working stroke in the plunger pump housing, a hydraulic unit including a hydraulic motor connected through a hydraulic distributor to an oil pump, on the input shaft of which an elastic membrane is installed, as well as hydromechanical dampers, one of which is rigidly attached to the lower end surface of the roller screw nut , and the other is installed between the oil-filled housing and the hollow rod of the drive with possibility of contacting the nut of the roller-screw drive in its extreme upper position.

EFFECT: invention performs its functions effectively.

3 cl, 5 dwg