STAGE OF MULTISTAGE CENTRIFUGAL OIL-WELL PUMP Russian patent published in 2006 - IPC F04D13/10 

FIELD: oil producing industry.

SUBSTANCE: invention relates to centrifugal pumps designed for producing oil with high content of gas. Proposed stage of centrifugal multistage oil-well pump contains guide-vane assembly with vanes and impeller which, in its turn, contains driving disk with blades. Cells open from outer side are made on periphery of upper surface of impeller driving disk. Ring groove is made on upper surface of impeller driving disk between its axle of rotation and cells. Single cells or groups of adjacent cells consisting of at least two cells alternate over periphery of upper surface of impeller driving disk with single through channels communicating ring groove with periphery of impeller or groups of like adjacent through channels consisting of at least two through channels.

EFFECT: increase head of stages with prevention of formation of gas bubbles in space between driving disk of impeller of preceding stage and guide vane assembly of following stage, prevention of impeller floating up and, as a result, increased wear of metal of contact surfaces of impeller and guide-vane assembly.

5 cl, 7 dwg