Baroid 41

Typical Properties

Appearance: Variable-colored, free-flowing powder
Specific gravity: 4.2 (minimum)
Moisture content: Less than 1%
Bulk density, lb/ft³:  150 >94%
Mineralogical component: barium sulfate (containing no free barium ion)

Mixing & Handling

Before adding BAROID weighting material, the Marsh Funnel viscosity (sec/qt) of the circulating fluid should be increased to four times the desired final weight by the addition of AQUAGEL viscosifier or QUIK-GEL viscosifier.

Add BAROID weighting material through a high shear mixer so the entire circulating volume is at uniform weight.

To control an artesian flow at the surface, premix the necessary volume of weighted mud and apply in one continuous operation. NOTE: In near surface holes drilled in unconsolidated alluvium (overburden), weights in excess of 11 lb/gal (1.32 g/cm³) could result in loss of circulation.

Amount of BAROID Weighting Material Required To Increase the Density of 100 Gallons of QUIK-GEL Drilling Fluid with Initial Density of 8.5* lb/gal

Final Weight lb/gal	Barite to Add lb/100 gal	Hydrostatic Gradient psi/ft	Final Volume gal
9	67	0.468	102
9.5	137	0.494	104
10	210	0.52	106
10.5	285	0.546	108
11	364	0.572	110
11.5	446	0.598	113
12	532	0.624	115

*Based on a QUIK-GEL slurry of 20-30 pounds per 100 gallons of water or 24-36 kilograms per cubic meter of water

Notes:

• Hole Volume (gal) = (hole diameter in inches) 2 x 0.042 x (depth in ft.)
• Hole Volume (m³) = (hole diameter in mm) 2 x 0.0000008 x (depth in meters)
• Always mix a minimum of 2 hole volumes

Final Weight g/cm³	Barite to Add kg/m³	Hydrostatic Gradient kPa/meter	Final Volume m³
1.08	67	0.468	1.02
1.14	136	0.494	1.04
1.2	208	0.52	1.06
1.26	283	0.546	1.08
1.32	361	0.572	1.1
1.38	443	0.598	1.13
1.44	537	0.624	1.15

Packaging & Controls

BAROID weighting material is packaged in 50-lb (23 kg) multiwall paper bags.

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