PAC: 1. Flocculant Coagulan; 2. It have PAC-LV and PAC-HV. PAC Petroleum drilling fluid additives Test Specification Test Presence of Starch or CMCAbsent Absent Degree of Substitution≥0.90 0.91Moisture, %≤10 7.1Apparent viscosity≤25 20.5API filtrate volume, corrected, ml ≤20 12.9PH6.0-8.5 8.0 PAC