1. Property It's a proven extensively used drilling fluid additive having many fine properties. Oil asphalt is basal raw material. It appears brown in easy breakable pieces or fluidized powder. It’s partly water soluble partly oil soluble for every kind of drilling fluid. Our factory is the first manufacturer who produces these related products in China. 2．Quality Indexes Items index Appearance powder PH 8-10 Moisture % ≤8.0 Sodium sulfonate content % ≥10.0 water soluble content % ≥90.0 oil soluble content % ≥18.0 HTHP. FL reducing rate % ≥40.0 3. Use They can emulsify fresh water or sea water with oil, depress the dispersion of drill chips, control HTHP FL, produce thin and tenacious mud cakes, help maintaining low shearing rate under HTHP, clean and stabilize well holes that have a great deal of collapsing shale.