... Xanthan Gum, XC polymer, XCD polymer Drilling, workover or completion fluids viscosifying additive ... all fresh-water, salt water and gyp drilling fluids, the product has a high resistance ... with virtually all common drilling fluids additives.Xanthan Gum increases the viscosity of the drilling fluid at low shear ... rates, which occur at the bit, the drilling fluid treated with XC-polymer is low-viscous, ...