... drilling fluids Oil Drillling Fluid benton bentonite clay for oil drilling fluidsorganophilic clay (organoclay) for oil drilling fluids ... final viscosity of a certain batch. Bentonite,bentonite clay,bentonite additive,chemical bentonite,Thickener additive,thickener agent, ... bentonite (organoclay) for oil drilling fluids,organophilic clay (organoclay) for oil drilling fluids,Oil Drillling Fluid ...