PUMPING PLANT Russian patent published in 1995 - IPC

FIELD: petroleum industry. SUBSTANCE: starting-shut-off valve having a controllable drive is mounted in the pump main of the centrifugal pump with the drive from the regulated electric motor. The input of the control unit is electrically connected with measuring equipment, the output is connected with the drives of the pump and the valve. A nozzle cap with the converging tube and diffuser sections is mounted in the pipeline, a shunting valve is mounted in the pump main. The smallest cross-section of the cap is communicated by an additional pipeline with the input main of the pump. An additional starting-shut-off valve is mounted in the additional pipeline. The valve drive is electrically connected with the output of the control unit. The measuring equipment is made as a flow transducer and a rotational speed transducer of the electric motor rotor. EFFECT: enhanced efficiency during the utilization of wells. 1 dwg