ENVIRONMENT-FRIENDLY LUBRICANT COMPOSITION FOR WATER-BASED DRILLING FLUIDS

摘要

A lubricant composition for water-based drilling fluids is disclosed. The lubricant composition comprises a synthesized ester obtained by blending at least one polyhydric alcohol and at least one fatty acid, wherein the ratio of said polyhydric alcohol to said fatty acid is in the range of 1:9 to 9:1, and said fatty acid is free of bis-allylic protons. The lubricant composition is environmental-friendly, non-toxic and highly biodegradable.