BAROID weighting material is a specially processed barite in powder form for use as a drilling fluid weighting additive. BAROID weighting material meets the American Petroleum Institute (API) Specification 13A, section 7 requirement for a drilling fluid barite.
- High quality, free from corrosive and abrasive material
- Chemically inert
- Cost-effective weighting agent
- Helps increase drilling fluid density with minimum solids
- Helps control formation pressures
- Helps stabilize the borehole
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|
*Based on a QUIK-GEL slurry of 20-30 pounds per 100 gallons of water or 24-36 kilograms per cubic meter of water
- 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
|Amount of BAROID Weighting Material Required To Increase the Density of 1 m³ QUIK-GEL Drilling Fluid with Initial Density of 1.02* g/cm³|
|Final Weight g/cm³||Barite to Add kg/m³||Hydrostatic Gradient kPa/meter||Final Volume m³|
PACKAGING & CONTROLS
BAROID weighting material is packaged in 50-lb (23 kg) multiwall paper bags.