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Objective The aim is to solve the high energy consumption and carbon emission in the processing of oil-bearing drilling cuttings produced by an offshore drilling platform in Tianjin, which might bring secondary pollution to the environment and other difficult problems, and explore new ideas for realizing the development goal of carbon neutrality. Methods An efficient demulsifier was selected, and the demulsification and centrifugation combined treatment process were used to explore the removal efficiency of oil components in oil-bearing drilling cuttings. The optimum reaction conditions were determined by optimizing the design of orthogonal test. Results The best removal efficiency was observed with LB1025 demulsifier in the study. Further, the optimum reaction conditions were identified to be as follows: the effective concentration of demulsifier was 60%, the reaction temperature was 60 ℃, the stirring intensity was 700 r/min, the reaction time was 30 min, and the centrifugal speed was 5 000 r/min. Under the above conditions, the oil removal rate of oil-bearing drilling cuttings could achieve 96.77%, while athe residual oil rate was 0.21%, which could meet the emission standard of Grade B in GB 4284-2018 Control standard of pollutant in sludge for agricultural use. Conclusions Demulsification and centrifugation process can effectively reduce the oil content of oil-bearing drilling cuttings, and provide technical reference for efficient, energy-saving and environmental treatment of oil-bearing drilling cuttings in realizing the development goal of carbon neutrality. [ABSTRACT FROM AUTHOR]