OPTIMISATION METHOD OF GEOMETRICAL PARAMETERS OF FLOW PASSAGES OF STAGES OF SUBMERSIBLE CENTRIFUGAL PUMP WITH LOW FLOW RATE Russian patent published in 2013 - IPC F04D13/10 F04D29/22 F04D29/44 

FIELD: oil and gas industry.

SUBSTANCE: optimisation method of geometrical parameters of flow passages of stages of centrifugal pump with low flow rate consists in increase of distances between two discs of the guide vane and two discs of impeller, between which vanes are fixed, and in reduction of the number of vanes of the guide vane and impeller. Besides, impeller vanes are elongated and its outlet part is bent when the inlet section of the vane is attached to the side opposite to impeller rotation till trailing edge of a vane coincides with external surface of impeller.

EFFECT: increasing the pump life by reducing the probability of fouling at production of formation fluid and other liquid media from wells with wide range of change of mechanical impurities; increasing the head and efficiency.

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