| 摘要 |
FIELD: oil and gas industry; production of chemicals for treatment of drilling fluids. SUBSTANCE: proposed method resides in subjecting reaction mixture to heating at temperature 60-70 C under stirring conditions, followed by condensing it at 80-95 C and by neutralizing it with caustic soda, reaction mixture having following composition, wt.%: lignosulphonate 94-95, formalin 2-3, sulfuric acid 3-4. EFFECT: proposed reactant improves filtering, structural and mechanical properties of clayey drilling fluids. |
