METHOD OF PREPARATION AND PURIFICATION OF FINELY DIVIDED WATER-GAS MIXTURE INTO INJECTION WELL AND DEVICE FOR THE MIXTURE PREPARATION Russian patent published in 2018 - IPC E21B43/20 F04F5/04 E21B41/00 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, in particular to the technology of water and gas impact in the development of oil fields. Method includes the preparation of a dispersed water-gas mixture, feeding it through the outlet pipeline to the injection well and pumping along a tubing string to the bottom of the well. Mixture is obtained by supplying water under pressure to the Venturi through a confuser and simultaneously supplying gas under pressure to a mixing chamber, formed in the Venturi diffuser, which is carried out by high-speed jets through gas nozzles, made in the body of the mixing chamber, providing crushing in the water of gas jets into small bubbles. Multi-nozzle adjustable mixer comprises a gas supply chamber and a Venturi tube with a replaceable nozzle in the confusion-diffuser transition zone, which is adapted to change the flow rate of the water passing therethrough, and in the inner widening cavity of the Venturi diffuser a mixing chamber is formed, in the body of which the replaceable gas nozzles are made, which are arranged evenly around the circumference in 3-10 rows.

EFFECT: hydrostatic pressure at the bottom of the injection well is additionally increased by pumping a fine-dispersed water-gas mixture with a controlled gas content.

2 cl, 2 dwg