METHOD FOR BOREHOLE OIL PRODUCTION Russian patent published in 2008 - IPC E21B43/20 

FIELD: oil production with reservoir pressure retention and oil displacement from deposit with water.

SUBSTANCE: method involves using water, which is lifted from producing wells along with oil, for oil displacement; operating oil-producing wells with downhole pumps driven by hydraulic motors, which are activated by water injection from surface, wherein said water is produced from water-bearing reservoirs or from opened water bodies; creating and using separate water-supply low-pressure net; connecting discharge lines of water producing wells and discharge lines of injection wells to the low-pressure net; providing some injection wells with downhole pumps driven by hydraulic drives to provide controllable water injection in reservoir and water removal from reservoir; using said pumps for water taking from water-bearing horizons and for water, oil and gas transportation from oil-producing wells to treatment plant; periodically isolating hole annuity of oil producing wells from oil accumulation net; equipping land-based injection and power pumps, namely pumping stations and locking-and-regulating well devices with remote control system, which controls thereof from central control panel.

EFFECT: improved oil displacement and decreased costs of the method realization, increased efficiency of cyclic reservoir treatment, extended reservoir coverage with displacement processes and reduced produced oil and gas costs.

4 cl, 2 dwg