WELL PUMPING UNIT FOR SIMULTANEOUS SEPARATE OPERATION OF TWO FORMATIONS Russian patent published in 2020 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, and can be used for simultaneous separate production of oil from two producing formations by one well. Downhole pump unit for simultaneous separate operation of two formations, comprising a flow column, a packer, an electric submersible pump with an input module and an electric motor, suck-in submersible pump with hydraulic nozzle connected with drive rod arranged in flow column, enclosed in sleeve with radial hole, communicating with channel of hydraulic nozzle above packer. At that, the plant is equipped with a heat transfer device, the housing of which is made with finning plates with diameter smaller than in the inlet and outlet pipes, wherein finned part is located directly in interval of influx from productive formation with formation between it and casing string with possibility of free passage of liquid from upper formation to reception of sucker-rod pump, inlet branch pipe accommodates swirling device secured on bush and fixed from below by thrust nut. Equipment of the well with a heat transfer device in the interval opposite the upper productive formation will make it possible to provide efficient heating of the formation fluid due to increase of the heat exchange surface and improving heat transfer conditions on the wall of the casing string in the area of the upper productive formation, which is determined by the natural thermal energy of the fluid of the lower formation and heat generated by the electric-centrifugal pump.

EFFECT: well pump unit for simultaneous separate operation will make it possible to increase coefficient of oil extraction and productivity of upper productive stratum operated by sucker-rod pump due to reduction of oil viscosity.

1 cl, 3 dwg