FIELD: lifting liquid media from wells.
SUBSTANCE: proposed pumping unit includes tubing string with upper and lower packers. Upper packer is installed higher than top of upper productive stratum, and lower packer is arranged between upper and lower productive strate. Fitted on tubing string is support with bypass ports and seat for mounting detachable jet pump. Nozzle of jet pump, being installed on seat from side of inlet, communicates with inner space of tubing string lower than jet pump and from side of outlet at outer side communicates with upper productive stratum. Unit has valve unit and check valve installed in tandem from top to bottom between jet pump and lower packer. Centrifugal pump is connected to lower end of tubing string. Lower packer is arranged maximum 10m lower than surface of upper productive stratum, and upper packer, maximum 10 m higher than its top. Support of jet pump permits mounting of locking insert.
EFFECT: improved efficiency of pumping out media at variable operating conditions of upper and lower productive strata with possibility of intensification of influx rate of medium pumped out of upper productive stratum.
2 dwg
