UNIT FOR SIMULTANEOUS SEPARATE PRODUCTION AND INJECTION UNDER CONDITIONS COMPLICATED BY HIGH VISCOSITY OF PRODUCT OF UPPER FORMATION Russian patent published in 2024 - IPC E21B43/12 E21B43/14 

FIELD: oil industry.

SUBSTANCE: unit for simultaneous separate production and injection in conditions complicated by high viscosity of the product of the upper formation consists of a sucker-rod pump, a production tubing string, an injection pipe string and a packer located between the upper and lower productive formations. Sucker-rod pump is actuated by a surface drive through the sucker rod string and is interconnected with the above-packer space of the well. Injection string is connected to the well below-packer space. At sucker rod pump intake there is coupling assembly. Coupling assembly and the injection pipe string are coupled by an upper two-channel coupling in series connected to an additional packer with self-sealing collars and a lower two-channel coupling in which a branch pipe and a shank end are coupled. In the cavity of the additional packer there is an internal pipe interconnected with the coupling assembly and the branch pipe, through which the liquid is extracted, and the liquid is pumped through the shank along the cavity of the additional packer.

EFFECT: increasing the efficiency and reliability of the installation for simultaneous separate production and injection in conditions complicated by the high viscosity of the upper formation products.

1 cl, 2 dwg