SUBMERSIBLE MULTISTAGE CENTRIFUGAL PUMP Russian patent published in 2020 - IPC F04D13/08 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: device relates to oil machine building, namely to multi-stage centrifugal pumps with compression assembly circuit. Submersible multistage centrifugal pump comprises a vertical cylindrical housing, on the ends of which there is a fishing head and an input module with holes for collecting formation fluid, set of stages consisting of impellers and guiding devices assembled on shaft installed along housing axis. Walls of the fishing head and the inlet module have through channels. Pump is equipped with located inside input module between holes for intake of formation fluid and through channel in its wall unit of hydrostatic support in form of thrust disc rigidly fixed on housing, located under axial support plate, rigidly fixed on shaft, and labyrinth-screw shaft seal installed under disk of axial bearing, forming under it discharge chamber. Through channels in the wall of the fishing head and in the wall of the chamber of the inlet module are connected by a pipeline, with the possibility of supplying part of high-pressure formation liquid to the pressure chamber.

EFFECT: higher operating life of pump.

1 cl, 1 dwg