Oilfield Drilling Fluid Additives And Water Treatment : Sulfonated Asphalt, Xanthan Gum, Polyanionic cellulose PAC, Carboxymethyl cellulose Cmc, Drilling Grade Anionic & Cationic Polyacrylamide, Water Treatment Grade Anionic And Cationic Polyacrylamide, Sulfonated Lignite, Sulfonated Phenolic Resin, Caustic Lignite, Sodium Polyacrylate, Barite and so on.