... Oil IndustryPetroleum grade Product features:1, high degree of substitution, good uniformity of substitution .2, high transparency, viscosity and water ... brine slurry .4, stabilize soft soil structure, prevent collapse of wall of a well .5, can improve mud-making volum, reduce ... filteration loss .6, has excellent performance in drilling of oil .Petroleum grade Product: PAC-LV, PAC-R, CMC ...