... , such as swelling power, cohesiveness ,catalysis, thixotropy, suspension property and cation exchange property and so on, so it is widely used in ... ,°C1200-1300≥1350PH value7.89.0-9.5Drilling mudViscosity,suspension property 600r/min≥30>30Fluid loss /ml , 300min≤15.0<13Mud ...