Drilling Fluid Concepts - 42 FM25/FM25X Operator’s Manual
Mixtures
Mixtures
General mixing order
1. Soda ash
2. Bentonite
3. Polymer
4. Con-Det
Bore-Gel contains premixed bentonite, polymer, and soda ash. Follow guidelines below to ensure proper
drilling fluid viscosity for expected drilling conditions.
NOTICE: Bentonite does not mix well in water containing polymer. To use both, mix bentonite first, then
add polymer.
• If chemicals are added in the wrong order, they will not mix properly and will form clumps.
• If tank contains bentonite/polymer mix and more drilling fluid is needed, completely empty tank and
start with fresh water before mixing another batch.
Conditions Amount to Use
normal drilling 15 lb/100 gal 7 kg/380 L
sand or gravel up to 45 lb/100 gal up to 21 kg/380 L
rock up to 50 lb/100 gal up to 23 kg/380
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