... , Large quantity: 50,000TONS annually Competitive price Prompt delivery driling fluids CMC 1, high degree of substitution, good uniformity of substitution ... ,Mainly used in oil drillingdrilling fluids CMC : 1, high degree of substitution, good uniformity of substitution ... ≤13≤12≤11 ≤26≤18Test StandardAPI 13 I oil drilling fluids garde CMC