What is the functions of drilling mud?

1. Maintain hydrostatic pressure.

2. Lifting cuttings.

3. Cooling the bit.

4. Lubricant the string.

5. Gathering information.

6. Prevent caving's.

maintain hydrostatic pressure

cooling the bit

lubricant

lifting cuttings

it has six  functions of drilling mud :

1- Removing cutting

2- cooling.

3- gathering information

4-buoyancy

5- controlling pressure

6- transmitting power.