B- Inhibited Mud

((Is that mud which repress the hydration and subsequent dispersion of clay into the mud)).

1- Lime mud.

2- Low lime mud.

3- Gypsum mud.

4- Sea water mud.

5- Saturated salt water mud.

6- K-plus mud.

Advantages over conventional water base mud:-

1- will Telerate a higher concentration of clays before   developing high viscosity,

2- less drastic effects by contaminants such as cement,   anhydrite, ..

3- can be raised to a higher mud weights before developing   excessive viscosity,

4- less progressive gelling tendency.