HYDRAULIC PUMP UNIT Russian patent published in 2018 - IPC F04B47/08 

FIELD: motors and pumps.

SUBSTANCE: invention relates to the field of pump construction and can be used for the extraction of oil, water and other liquids from wells. Installation contains a double-acting pump, hydraulic system and an electric motor. Double-acting pump is designed as two consecutive sections with rodless hydraulic cylinders equipped with movable transverse partitions separating the well fluid from the working fluid. Entrance to each cylinder is provided with a channel made in the form of a labyrinth, and the transverse partitions are made in the form of elastic diaphragms or in the form of twin pistons with a spring-loaded seal and a leakage compensator.

EFFECT: increased reliability and productivity of the pumping unit.

7 cl, 11 dwg