CENTRIFUGAL MULTISTAGE PUMP Russian patent published in 2005 - IPC

FIELD: oil producing industry; production of centrifugal multistage pumps.

SUBSTANCE: the invention is dealt with centrifugal multistage pumps, that may be used in the systems of artificial maintenance of a seam pressure at oil fields, and also for pumping-out from holes of stratum liquids and gas-containing mixtures with an increased share of a gas. Each stage of the pump hasa runner and a guiding apparatus with a fixed guiding bladed lattice. The lattice is made in the form of the radial plates and is mounted on section in the front cavity of the runner with a clearance in respect to a covering disc. On the main disk there are impellers fixed with a clearance in respect to the internal wall of the guiding apparatus. On the butt surfaces of the runner there are grooves, in which stopper rings are placed. The cartridge of the guiding apparatus also has a stopper ring. The invention is aimed at an increase of pressure and profitability of the pump, increased reliability and service life of the pumping equipment.

EFFECT: the invention ensures increased pressure, profitability, reliability and service life of the pumping equipment.

4 cl, 2 dwg