FIELD: oil and gas industry.
SUBSTANCE: group of inventions can be used for liquid pumping from bottom of a waterlogged formation into upper oil well formations. Apparatus according to first version comprises tubings connected with a packer separating inter-formation space, electric submersible pump, including electric drive equipped with a telemetry unit, tightly connected to power cable with control station, receiving module and working sections with a check valve at outlet, and support packer with cable entry above oil-bearing formation. Pump is arranged with telemetry unit above water cut well formation and check valve is connected by tubings to shaft of inter-formation packer with cable entry and support anchor. Inter-packer tubings at level of oil-bearing formation are connected by well flow chamber, in wall of which there are radial through holes connecting cavity of tubings with an oil-bearing formation through space between packers. Installation in second version contains bearing packers with cable entry, installed above and between oil bearing formations. Inter-packer tubings at level of oil-bearing formations are connected by well flow chambers, on inner side walls of which there is an annular recess. At level of recesses in wall there are radial through holes overlapped with replaceable cylindrical insert by orifice holes in wall, metering flows of liquid from cavity of tubings into oil-bearing formations through inter-packer space of well. Apparatus according to third version comprises bearing packers with double cable entry, installed above and between oil bearing formations. Inter-packer tubings at level of oil-bearing formations are connected by well flow chambers, comprising hydraulic throttles, equipped with additional telemetry unit, electrically controlled from remote control station well via a communication cable with possibility of adjusting fluid pumping from water-flooded formation into oil well formations.
EFFECT: higher reliability of well operation.
3 cl, 3 dwg
