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

FIELD: oil industry.

SUBSTANCE: formation pressure maintenance system includes a water intake well, into which a submersible centrifugal pump is lowered, and injection wells communicated with the water intake well through high-pressure water conduits. At the mouth of the water intake well, the water conduit is equipped with a filtration unit. Submersible centrifugal pump is equipped with a tube, the upper end of which is located above the dynamic level of liquid in the annular space of the water intake well, and the lower end is brought through the receiving module to the pump inlet. At the same time at the pump inlet there is a conical confuser forming with the tube and the pump shaft a liquid-gas ejector for gas pumping from the annular space to the pump inlet. Submersible centrifugal pump is lowered into the water intake well to a depth sufficient for its operation on a water-gas mixture without interruption of supply.

EFFECT: higher efficiency of operation of a water intake well with a submersible centrifugal pump, increased oil recovery and improved environmental situation at fields.

1 cl, 2 dwg