SUCKER ROD PUMP HYDRAULIC DRIVE CONTROL SYSTEM Russian patent published in 2022 - IPC F04B47/02 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, namely to control systems of hydraulic drives of rod pumps for control over redundancy of electrohydraulic equipment. Sucker rod pump hydraulic drive control system comprises a programmable logic controller, connected through discrete outputs to at least two intermediate relays connected to at least two electromagnets, discrete inputs of programmable logic controller are connected to outputs of at least two sensors of level of working fluid (for example, oil) in hydraulic tank (hydraulic tank), analogue inputs of the programmable logic controller are connected to analogue outputs of at least two temperature sensors and at least two pressure sensors. Signals on failure of said sensors are transmitted to the programmable logic controller through discrete and analogue inputs, based on these signals, switching to the corresponding standby sensor takes place. Corresponding discrete and analogue outputs of programmable logic controller are connected to corresponding inputs of two frequency converters of each of two asynchronous electric motors, connected, in turn, with corresponding hydraulic motors of pressure lines of the pumping station. Based on operator settings or upon detection of malfunction of electrohydraulic equipment of one of pressure lines, programmable logic controller controls frequency of asynchronous electric motors through discrete and analogue outputs and controls their switching on or off to ensure operation of downhole equipment with a given number of double strokes of the hydraulic cylinder rod.

EFFECT: providing automatic increase in the range of adjustment of parameters of operation of the sucker rod pump and ensuring the safety of operation of the hydraulic drive of the sucker rod pump due to the automatic drive.

1 cl, 1 dwg