FIELD: oil and gas industry.
SUBSTANCE: group of inventions can be used for pumping a liquid from upper water-flooded formation into lower oil well formations. Apparatus according to first version comprises a flow column, a packer with two anchor devices of oppositely directed action, disconnecting interstratal space of well, and a rotary pump connected by input to over-packer space and by output to below-packer, including an electric drive with a sealed power supply cable entry, passing through wellhead flange with cable entry, provided with telemetry unit connected via cable with a control station. Pump is tightly connected by output to a telescopic fitting assembly with barrel packer. In apparatus according to second version, packer installed between oil bearing formations is made with downhole anchor device, and packer, between upper petroliferous and water cut formations, with support anchor device. Flow columns at level of oil-bearing beds are connected by flow and bottomhole well chambers, on inner side walls of which there is a circular recess, at level of latter in wall there are radial through holes overlapped with replaceable cylindrical insert with throttle holes in wall, metering flows of liquid from cavity of tubing in oil-bearing formations through inter-packer and below-packer space of well. At free end face of chamber there is a sludge collector, blocking flow channel of cylindrical insert. In apparatus according to third version, flow and downhole well chambers comprise hydraulic throttles, equipped with unit of telemetry system connected by electric communication cable to telemetry unit of automatic or manual control via power supply cable from panel to control station of well with possibility of adjusting volume of fluid injection into oil well formations. Flow chamber is provided with eccentric longitudinal channel communicating cavity of tubing. Telescopic fitting assembly is equipped with an electrical connector of a communication cable, which provides separate lowering and lifting of centrifugal pump and packer with hydraulic throttles.
EFFECT: higher reliability of well operation.
3 cl, 3 dwg
