METHOD OF MULTIPHASE PUMP OPERATION AND ITS ARRANGEMENT Russian patent published in 2017 - IPC F04C2/16 F04C13/00 F04C15/06 

FIELD: engines and pumps.

SUBSTANCE: pump comprises an inlet (10) located on the suction side and an outlet (20) located on the pressure side. A multiphase mixture enriched with solid particles is pumped by the pump. The method of its operation comprises the following stages: pumping the multiphase mixture into the separator chamber located on the pressure side (45), separating gaseous phase from liquid phase and solid phase in the separator chamber (45), separating liquid phase from solid phase in separator chamber (45), supplying a portion of liquid phase purified from solid phase to the suction side. The supply of liquid phase to the suction side is carried out by means of recirculation line (50) in which a valve is located (55). After start-up and after reaching stable operation, the valve (55) is shutoff to begin pumping and increase the pressure of the multiphase mixture.

EFFECT: reduced wear of screws and the body.

22 cl, 7 dwg