Indoor Experimental Study on Solid-Liquid Separation of Water-Based Drilling Cuttings
The structure of water-based drilling cuttings is complex and can cause significant environmental harm.Research on efficient treatment methods for water-based drilling cuttings is of paramount importance.However,there is still a lack of experimental research on drilling cuttings solid-liquid separation methods.Therefore,focusing on the most common solid-liquid separation methods in water-based drilling cuttings,namely centrifugation and filtration,centrifuge experiments,porous medium filtration experiments,and membrane filtration experiments were conducted.The experiments primarily assessed the effectiveness of solid-liquid separation in water-based drilling cuttings by comparing the solid phase content,liquid phase density,and liquid phase turbidity under different parameter conditions.In the centrifuge experiments,the optimal dosage of flocculant(polymeric ferric sulfate)was determined to be 20g·L-1,with a centrifuge speed of 2000rpm.The preferred porous medium identified in the porous medium filtration experiments was quartz sand.In the membrane filtration experiments,the preferred ultrafiltration membrane was polysulfone membrane(PSF).The results obtained from the experiments can be used to guide on-site dosage of chemicals,centrifuge speed settings,and reuse of the filtered liquid phase.
Water-based drilling cuttingsCentrifuge experimentsPorous medium filtrationMembrane filtrationSolid-liquid separation
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