DOWHNOLE PUMP UNIT FOR SIMULTANEOUS AND SEPARATE OPERATION OF TWO FORMATIONS Russian patent published in 2013 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: unit includes a flow column, a sleeve with a shank, a bottom-hole submersible pump with a hydraulic nozzle, which is connected to an actuating rod arranged in the flow column; the latter are enclosed in the sleeve with a radial hole interconnected with a channel of the hydraulic nozzle above a packer, and an electric submersible pump with and inlet module and an electric motor. At the electric pump outlet there installed is a check valve interconnected with the flow column through an intermediate pipe, a jet ejector installed in the seat of a connecting coupling and located in the sleeve shank, and a cavity formed between the cylinder of the bottom-hole pump and the sleeve. In the connecting coupling there are radial channels at the level of the gap between ends of the shank and the intermediate pipe below the packer. Hydraulic nozzle is installed in the sleeve by means of cups so that it is borne against a collar with inner diameter that is larger than outer diameter of the jet ejector and fixed by means of an expanding collet with possibility of removing the bottom-hole pump and the jet ejector from the unit. In the sleeve there is a bypass channel connecting the volume below the bottom-hole pump to the inter-tube space above the packer through the cavity between the cylinder of the bottom-hole pump and the sleeve.

EFFECT: higher operating reliability of the downhole pump unit.

3 cl, 4 dwg