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Microspheres
Product #15110 / 15120
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Microspheres are ceramic hollow microspheres with a shell composition of aluminosilicate and are filled with a gas mixture of CO2 and N2.
Microspheres are used to reduce slurry density to as low as 1,000 kg/m³. These lightweight slurries are typically used in areas with low fracture gradients to eliminate the need for multistage cementing.
Microspheres are not recommended for use where the bottom hole pressure exceeds the crush strength of the microsphere. Microspheres may be added at up to 150% by weight of cement.
Mixing & Handling
Microspheres are compatible with all classes of cement but must be dry blended and not premixed in the water. Use good industrial hygiene practice and wear goggles and a dust mask when handling the material.
Physical Properties
Appearance: Light grey
Specific Gravity: 0.6-0.8
Bulk Density: 320-400 kg/m³
Particle Size: 10-300 microns
Average Wall Thickness: 10% diameter
Crush Strength: 3500-5000 psi
Softening Point: >2700°F
Chemical Properties
pH: 6.5 - 7.5
Shell Properties
- Silica: 55-65%
- Alumina: 25-35%
- Iron Oxide: <5%
Gas Properties
- Carbon Dioxide: 65-75%
- Nitrogen: 25-35%
Packaging & Controls
WHMIS: Not controlled
TDG: Not regulated
Packaging: 1700lb bag / bulk