ANNULAR GAS PUMPING DEVICE Russian patent published in 2023 - IPC E21B43/12 F04F5/00 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for bypassing annular gas into a tubing string (tubing) in wells operated by submersible electric submersible pumps. The annular gas pumping device is located in the tubing string and contains a jet apparatus in the form of a Laval nozzle for bypassing the annulus gas into the tubing string. The Laval nozzle is made of two longitudinal halves, one of which is stationary installed with a check valve, and the second has the ability to move longitudinally inside the tubing string and is connected through permanent magnets to a piston spring-loaded from below and placed in a housing parallel to the axis of the tubing string, the lower end of which communicates with the annular space, and the upper - with the cavity of the tubing string. In this case, the plane of separation of the Laval nozzle into two asymmetric longitudinal halves is deviated from its axis of symmetry by an angle αin the ratio of 0<α≤arctg (l/d), where l is the length of the narrow part of the nozzle, d is the diameter of the narrow part of the nozzle.

EFFECT: increasing the flow rate of the well without the formation of hydrate plugs in the well, to reduce the suspension depth of the submersible electric centrifugal pump by increasing the level of formation fluid in the annulus.

1 cl, 4 dwg