FIELD: mining engineering.
SUBSTANCE: packer dual ejector unit of the production well contains a tubing string fixed by wellhead fittings, a jet pump, in the upper part of which there is a locking device for seating and removing it using a catcher, a packer and a check valve. The jet pump comprises a crossflow coupling that is, on one end, hermetically mated with a diffuser and a mixing channel of formation product entrained by a liquid jet injected by the nozzle from the surface of the well, which form a supply chamber of the formation product communicating with the peripheral longitudinal channels of the coupling and, on the other end, with an intake manifold provided at the inlet with the mentioned check valve communicating in turn with the peripheral longitudinal channels of the coupling on one side and, on the other end, with the pay formation of the well through the packer, fixed to the manifold, and through the formation product outlet pipe. The unit further comprises a production string interfaced with a bottom end with on the outer surface of the coupling below the radial channels and secured from above in the wellhead fittings, forming with the tubing string an intertube coaxial flow channel of supply of pumped fluid into the radial channels of the coupling, and the tubing string communicates with a channel of injection of a two-phase mixture from the diffuser of the jet pump into it. The nozzle is installed in the axial channel of the coupling communicating with its radial channels for supplying the pumped fluid from the intertubular flow channel. The axial channel of the coupling on the side opposite to the nozzle is blocked by the plug below the level of the radial channels.
EFFECT: increase of output and reliability of operation of production wells.
2 cl, 3 dwg
