STAGE OF SUBMERSIBLE MULTISTAGE CENTRIFUGAL PUMP Russian patent published in 2017 - IPC F04D13/10 F04D29/44 F04D29/02 

FIELD: engine devices and pumps.

SUBSTANCE: stage of a submersible multistage centrifugal pump contains an impeller and a guide device, which consists of a housing, a top disc, a metal bushing, a bottom disc and blades. The guide vanes are located only on the top disc, which is connected to the metal housing. The metal bushing is connected to the bottom disc. The disks and blades of the impeller and the discs and vanes of the guide device are made of a polymer material including a glass-filler and a thermoplastic material.

EFFECT: increase in efficiency, maintainability, resistance to abrasive wear and precipitation of mechanical impurities, including salts, in the channels of the guide device and stage impeller, reduction in the pump supply drop with increasing viscosity of the formation fluid.

6 cl, 10 dwg