BOREHOLE PUMPING UNIT FOR TWO RESERVOIRS SIMULTANEOUSE PRODUCTION Russian patent published in 2010 - IPC E21B43/14 

FIELD: oil- and gas industry.

SUBSTANCE: invention related to oil-and gas industry, particularly to borehole pumping unit for two reservoirs simultaneous production. The borehole pumping unit contains tubing string, cable, parker, installed between reservoirs, tail, by-pass device which can be opened under pressure, top- piston with bas string and bottom- electro-submersible with electrical motor pumps for the corresponding reservoirs product withdrawal, pumps covered with top and bottom jackets. Electrical submersible pump bottom jacket equipped with a cable sealing unit and connected to under-parker clearance from the bottom via the tail. The electrical submersible pump outlet connected with the top jacket via fitting, which connected form the top with the tubing string and a side channel, connecting top pump inlet with above-parker clearance. The electrical submersible pump equipped with measurement block form the bottom, executed with ability to transfer data via cable. The top jacket executed as a sleeve with an additional longitude channel, equipped with a process pipe, fixed on top of the top jacket and connected with the tubing string from above, and from the bottom - with the side channel, equipped with safety return valve. The fittings connecting the bottom pump outlet to the tubing string via top jacket lateral channel, also equipped with additional return well, above which the by-pass unit located. The bottom jacket equipped with elbow with cable sealing unit and a process channels, installed between the bottom pump and electrical motor in a way that the pump inlet connected to the bottom jacket via process channels. Plunger pump executed as a insert one with ability of hermetic interaction with the top jacket process fitting internal surface. The measurement block equipped with damping centraliser, which interacts with the bottom jacket.

EFFECT: pump alternate operation ability, avoiding fluid spilling during their lifting, avoiding operation failure and the bottom pump early failure, application of a different combination of electrical motors and electrical submersible pumps, creation part load regime of the bottom reservoir operation.

2 dwg