SUBMERSIBLE PUMPING UNIT Russian patent published in 2013 - IPC F04D13/10 F04D29/58 F04D29/70 

FIELD: engines and pumps.

SUBSTANCE: unit includes in-series connected multistage bladed pump, a protector and an electric motor with housings to be arranged under the tubing string in the inner space of the casing string. The pump is provided with an inlet module including a separator with supporting wheels at the inlet, grids of blades in a separating drum, a device for removal of light impurities in the form of a separator with a system of tightly insulated channels, and a disperser. The unit is equipped with an annular tube to be installed with a radial gap in the tubing. The submersible electric motor is equipped with a flange having the possibility of direct stiff and tight attachment to lower base of the tubing above the protector and the submersible pump. The pump is arranged on the protector side opposite to the above flange of the electric motor. The annular tube is made so that the protector and submersible electric pump can be installed in it with formation of a transfer channel around them for supply of the working medium from the pump to the tubing.

EFFECT: creation of an effective submersible pumping unit with improved reliability and durability.

8 cl, 23 dwg