Ditch-witch MR90 Manuel d'utilisateur Page 65

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Systems and Equipment - 64 MR90 Operator’s Manual
Drilling Fluid Requirements
CMW
®
Drilling Fluid Requirements
1. Determine drilling conditions and choose appropriate drilling fluid mix.
2. Estimate amount of supplies needed and check availability.
Drilling fluid
Water supply. If more water than can be carried with the unit will be needed, arrange to transport
additional water.
Bentonite and/or polymer
3. Check water quality.
Use meter or pH test strips to test pH of water. If pH is below 9.0, add 1 lb (454 g) soda ash per
tank. Test and repeat until pH is between 9 and 10.
Check water hardness using hardness test strips. Treat with soda ash if hardness exceeds 125
ppm.
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