RESERVOIR PRESSURE MAINTENANCE SYSTEM Russian patent published in 2024 - IPC E21B43/12 E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry. A reservoir pressure maintenance system has been declared, including an intake well into which a submersible centrifugal pump is lowered, and injection wells communicating with a water intake well by pipelines, and at the mouth of the intake well, the conduit is equipped with a filtration unit. In this case, the installation of the submersible centrifugal pump is equipped with a pre-connected pumping section, the supply of which exceeds the sum of the flow rate of the intake well for liquid and the flow rate of free gas at the reception of the installation of the submersible centrifugal pump by at least the amount of flow ΔQ, which is determined by the proposed formula. At the outlet of the pre-connected pumping section, bypass holes are made to direct the mixture down into the annular gap between the production column of the intake well and the pre-connected pumping section and further to the reception of the submersible centrifugal pump installation. At the same time, the pressure of the pre-connected pumping section exceeds by at least 20% the amount of hydraulic losses when the mixture moves down through the by-pass openings and in the annular gap between the production column of the intake well and the pre-connected pumping section in the area between the by-pass openings and the reception of the submersible centrifugal pump installation.

EFFECT: technical result is an increase in the efficiency of operation of a water intake well with a submersible centrifugal pump, an increase in oil recovery and an improvement in the environmental situation in the fields.

1 cl, 1 dwg