The defoaming and foam-suppressing effects are strong, quickly eliminating bubbles in the slurry and inhibiting foam regeneration. It effectively prevents issues such as a decrease in drilling fluid density, unstable pump pressure, and insufficient discharge, stabilising all performance aspects of the slurry. It has good chemical stability and compatibility, does not damage the original slurry system, and is suitable for various water-based drilling fluids, improving the smooth efficiency of drilling operations.