Drilling Mud, Drilling Mud Chemicals, Drilling Fluids Additives manufacturer / supplier in China, offering Shark Superior Rheology Modifier and Viscosifier Aquavis L, 400° F Rheology Modifier for Clay-Free and Hpht Drill-in Wbm Aquavis L, Shark Liquid Viscosifier for Fresh Water and High Salinity Monovalent Brines Aquavis L and so on.