HYDRAULIC OIL PUMP DRIVE UNIT AND ASSOCIATED HYDRAULIC OIL PUMP Russian patent published in 2018 - IPC F04B47/04 F15B13/02 

FIELD: machine building.

SUBSTANCE: invention relates to oil producing equipment, namely to a hydraulic pump drive unit for oil production and the pump itself. Hydraulic actuator comprises engine, at least one first secondary hydraulic control unit and at least one second secondary hydraulic control assembly mechanically coupled to each other and driven by the engine. First volumetric flow divider is hydraulically connected to the first secondary hydraulic control unit, and also hydraulically connected to the drives of the first group of pumping rods, including at least two pumping rods, with the possibility of synchronously bringing the first group of pumping rods into reciprocating motion. Second volumetric flow divider is hydraulically connected to the second secondary hydraulic control unit, and also hydraulically connected to the drives of the second group of pump rods, including at least two pumping rods, with the possibility of synchronously bringing the second group of pumping rods into reciprocating motion. Contains the first sensor system, adapted to set the stroke length of the first group of pumping rods, second sensor system adapted to define the stroke length of the second group of pumping rods. Control valve is adapted to control the operating modes of each of the first secondary hydraulic control units and each of the second secondary hydraulic control units based on signals coming from the first and second sensor systems, respectively. Control valve is configured such that for at least a portion of the operating period of the first and second secondary hydraulic control units one of these units operates in the mode of the hydraulic motor and, together with the engine, drives another secondary hydraulic control unit operating in the pump mode.

EFFECT: hydraulic drive unit can be used with several oil wells.

11 cl, 1 dwg