Laboratory experiment research on waste oil-based drilling fluid treatment with chemical demulsification.

Chemical demulsification treatment of waste oil-based drilling fluid was studied. The screened best demulsifier SA could recover the mineral oil and the oil recovery rate reached 93%. The optimal demulsification process parameters were determined: adding amount of demulsifier SA is 0.8%, PAC coagulant dosage is 600 mg/L, flocculants PAM dosage is 8mg/ L, and the reaction time is 1h, temperature is (50±0.5)°C. Harmless treatment of isolated waste water and residue were also conducted. [ABSTRACT FROM AUTHOR]