FIELD: mining.
SUBSTANCE: group of inventions relates to pumping equipment for production of fluids from well. Submersible electric pump unit comprises engine filled with engine lubricating oil, production pump driven by engine, a heat exchanger and a circulating oil pump connected to the engine, a first oil line connected between the circulating oil pump and the heat exchanger, and a second oil line connected between the engine and the heat exchanger. Producing pump displaces fluids from well bore through heat exchanger. Circulating oil pump provides oil circulation between engine and heat exchanger to reduce engine operating temperature by first and second oil lines. Heat absorbed by the oil passing through the engine is transferred to the produced fluid medium moving through the heat exchanger.
EFFECT: inventions are aimed at improvement of efficiency of pump unit by reducing temperature of its electric motor.
20 cl, 7 dwg
