... ,Mainly used in oil drillingdrilling fluids CMC : 1, high degree of substitution, good uniformity of substitution . 2, high transparency, viscosity and water ... , reduce filteration loss . 6, has excellent performance in drilling of oil . Petroleum grade Product: PAC-LV, PAC-R, CMC-LV, CMC ... , ml≤16≤13≤12≤11 ≤26≤18Test StandardAPI 13 I oil drilling fluids garde CMC