DOWHNOLE PUMP UNIT FOR SIMULTANEOUS AND SEPARATE OPERATION OF TWO FORMATIONS Russian patent published in 2015 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: installation comprises the production string, a packer with cable entry, a hydraulic manifold, a reciprocating pump and electrically operated centrifugal pump with locking and circulating valve connected to the packer by a connecting pipe and a power cable. In the manifold there is the central opening and longitudinal channels in parallel to the central opening as well as radial channels communicated to annular space. In the central opening of the manifold, above radial channels, a reciprocating pump is fixed so that it forms a cavity communicated with longitudinal channels and cavity of the production string. Below radial channels in the manifold central opening there is a bypass group that covers radial channels in the barrel simultaneously below circular cups of the packer isolating the well formations or ejector releasing gas cap from blinded below-packer annular space covering the central opening and fixed in the manifold by expandable collets with their potential removing by means of a rope and installation tool with capture of grabbing head. In the bypass group and ejector below the blind there are radial openings communicating cavity of intermediate pipe with prolonged channels of the manifold.

EFFECT: increased processibility of well operation.

3 cl, 3 dwg