METHOD AND DEVICE FOR OIL POOL DEVELOPMENT Russian patent published in 2005 - IPC

FIELD: oil industry, particularly oil field development.

SUBSTANCE: method involves recovering fluid through production wells and injecting water-and-gas mixture in injection wells. The water-and-gas mixture is obtained at well head by injecting gas in jet pump. Water-and-gas mixture is dispersed and homogenized. To perform dispersion and homogenization operations water-and-gas mixture is supplied by jet pump in hydrodynamic cavitation unit and then in jet disperser to convert jet energy into acoustic wave energy and to initiate pulsatory cavitation. Device comprises jet pump with conical nozzle installed on central water supply pipe, side gas inlet pipe and central gas-and-liquid mixture outlet. The device is provided with hydrodynamic cavitation unit and jet disperser serially arranged downstream the jet pump. The cavitation unit and jet disperser are located in common case. Hydrodynamic cavitation unit is formed as a chamber provided with cup arranged on end wall thereof. The cup has central cavity and tangential gas-water mixture inlet. Jet disperser is made as a chamber with cup connected to end wall thereof. The cup is provided with central cavity, radial inlet orifices and depressions made in cup bottom. Cavities of cavitation unit cup and jet disperser cup are communicated one with another through central channel. Dispersed gas-and-liquid mixture outlet is made as central pipe connected to the second end wall of jet disperser cup cavity.

EFFECT: increased oil recovery and oil producing ability of the well.

3 cl, 2 tbl, 3 ex, 1 dwg