SUBMERSIBLE PUMPING UNIT FOR PUMPING LIQUID Russian patent published in 2020 - IPC E21B43/14 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to oil industry, namely to submersible pumping units for pumping fluid from water-bearing stratum into oil-bearing stratum in order to maintain reservoir pressure. Plant comprises load-carrying cable as lowering facility, load-carrying coupling, oil-filled electric motor, upper and lower hydraulic protections, the first inverted-type electric centrifugal pump (ECP) with an input module connected to it by means of the input device of the second ECP of the inverted type and a shank with the packer separating the water-bearing stratum from the oil-bearing stratum. Second ECP has an outer diameter smaller than the first ECP, and is surrounded by a casing to form an annular gap which is hydraulically communicated with the shank. Input device is equipped with radial channels for fluid supply to the second ECP and longitudinal channels connecting the first ECP discharge to the annular gap.

EFFECT: technical result is higher efficiency of submersible pumping unit for pumping liquid with limited size, simplified technology of its installation on well and reduced metal consumption.

1 cl, 3 dwg