COMPOSITION PREVENTING DEPOSITION OF ASPHALT-TAR-PARAFFIN MATERIALS DURING OIL PRODUCTION Russian patent published in 2002 - IPC

FIELD: oil and gas production. SUBSTANCE: invention, in particular, relates to preventing deposits under conditions of production waterless or low-watered up to 20% oil from wells with both low and high formation pressures at different temperatures. Composition contains (1) 4 to 65 wt.% of powdered synthetic detergent including at least 12% surfactants, at least 10.5% phosphate salts (calculated as P₂O₅), and at least 2% sodium silicate (calculated as SiO₂) or powdered industrial-grade detergent including at least 4.5% surfactants, at least 11% phosphate salts (calculated as P₂O₅), and at least 1.7% sodium silicate (calculated as SiO₂) and (ii) and sodium caustic liquid glass, to 100%. EFFECT: enhanced prevention of deposits, improved environmental safety, and reduced labor inputs during full repairs of wells. 5 tbl