Ditch Witch MR90 - Manual (Page 63)

Systems and Equipment - 62
MR90 Operator’s Manual
Recommended Products
CMW
®
Mixtures
General mixing order
1. Soda ash
2. Bentonite
3. Polymer
Bore-Gel
®
contains premixed bentonite, polymer, and soda ash. Follow guidelines below to ensure proper
drilling fluid viscosity for expected drilling conditions.
Basic Fluid Recipes
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
Soil type Mixture/100 gal (378 L) of water Notes
fine sand 35 lb (16 kg) Bore-Gel
coarse sand 35 lb (16 kg) Bore-Gel
.5 lb (225 g) No-Sag Add .5 lb (225 g) of Quik-Trol for
additional filtrate control
fine sand below water
table 40 lb (18 kg) Bore-Gel
.75 lb (340 g) Quik-Trol Add .5 - 1 gal (2-4 L) of Dinomul in high
torque situations
coarse sand below
water table 40 lb (18 kg) Bore-Gel
.75 lb (340 g) Quik-Trol
.75 lb (340 g) No-Sag Add .5 - 1 gal (2-4 L) of Dinomul in high
torque situations
gravel 50 lb (23 kg) Bore-Gel
.75 lb (340 g) Quik-Trol
.75 lb (340 g) No-Sag Add .5 lb (225 g) of Barolift to reduce loss
of returns
cobble 50 lb (23 kg) Bore-Gel
.75 lb (340 g) Quik-Trol
.75 lb (340 g) No-Sag Add .5 lb (225 g) of Barolift to reduce loss
of returns