SYSTEM OF CLOSED CIRCULATING WATER SUPPLY FOR HOLE DRILLING Russian patent published in 2003 - IPC

FIELD: mining industry, drilling operations. SUBSTANCE: system of closed circulating water supply for hole drilling includes preparation unit and circuit for circulation of drilling fluid which includes collector of circulating water and sewage and circuit for water tertiary treatment. Circuit for water tertiary treatment is included into circuit of circulation of circulating water and has collector of circulating water and sewage, electric coagulator, electric flotation plant and sectional distribution tank connected in series. Collector of circulating water and sewage is linked with outlet to inlet of sectional distribution tank. Electric coagulator is joined with outlet to inlet of electric flotation plant and with inlet to outlet of sectional distribution tank. Electric flotation plant is connected with inlet to outlet of electric coagulator and with outlet to inlet of sectional distribution tank. Collector of circulating water and sewage is fitted with thin-layer settler and separate collector and is connected with its outlet through separate collector to inlet of storage of hard waste. EFFECT: reduced volume of water consumption for drilling operations, provision for ecological safety of oil and gas production. 2 cl, 1 dwg