FIELD: oil producing industry.
SUBSTANCE: proposed electric pump contains drain valve, sludge branch pipe check valve with spring holder of shutoff device, section of pump with inlet module or gas separator and submersible electric motor with hydraulic protection series-connected by means of tubings. Marking of pump with sludge pipe and check valve provided with holder keeping shutoff device in one position during operation precludes choking of check valve when centrifugal electric pump and upper stages of pump are lowered after stopping.
EFFECT: provision of stable operation of pump under unfavorable conditions at failure of delivery.
2 dwg
