FIELD: oil industry.
SUBSTANCE: invention can be used in borehole oil production as a drive of a sucker-rod pumping unit. Hydraulic drive of sucker-rod pumping unit comprises two volumetric irreversible hydraulic machines of rotary type, power hydraulic cylinder and hydraulic tank connected by means of pipelines connected to hydraulic control valve and interconnected with overflow and safety valves. One of the pipelines includes a filter and a check valve. Electric motor controlled by an intelligent control system including a frequency converter and an inverter has a double-sided shaft output. Volumetric irreversible hydraulic machine of rotary type is kinematically connected to each of the ends of the shaft of the electric motor; at that, one of the above hydraulic machines is a hydraulic pump, and the hydraulic machine connected to the opposite end of the double-sided shaft of the electric motor is a hydraulic motor.
EFFECT: increasing the reliability and time between failures of the hydraulic drive of the sucker-rod pumping unit.
1 cl, 1 dwg
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