Flat rheology drilling fluid system
Optimize ECD, reduce barite sag and losses, and enhance ROP.
MicroBar micronized weighting additive is a high-quality micronized barite used as a weighting agent for nonaqueous drilling fluid applications. Compared with API drilling-grade barite, the MicroBar additive reduces barite sag and settlement.
Compatible with all base fluid types, the additive was developed as a dry, pneumatically conveyable product that can increase the mud weight of high-density nonaqueous fluids where barite sag represents a high risk.
Containing barite ground to 5–8 um on average, the MicroBar additive offers an enhanced viscosity profile, especially during the prolonged static periods associated with casing and liner runs, emergency disconnects, or planned long-term logging programs.
Notably, the MicroBar additive maintains constant density, even at bottomhole temperatures of 392 degF [200 degC]. This feature reduces the risk of well control issues and NPT associated with wide density variations.
The ultrafine MicroBar additive is pneumatically conveyable and can be blown from the vessel or bulk trailer to a tank. Pneumatic conveyance eliminates the labor-intensive handling required with micronized dry barite.
|Typical Physical Properties|
|Physical appearance||Gray to white powder|
|Bulk density||120–150 lbm/ft3 [1,920–2,400 kg/m3]|
|Minimum specific gravity||4.10|
|Particle size distribution||≤25 um|
Applications where weighting agent requires lower particle size distribution.
Normal safety protective equipment should be worn. Observe the precautions described on the safety data sheet. Dust masks should be worn while discharging MicroBar additive.
MicroBar additive is available in bulk or can be packaged in 3,300-lbm [1,500-kg] and 2,205-lbm [1,000-kg] bags. Big bag handling facilities need to be available for onsite rig use. Protect MicroBar additive from moisture.
Difficult displacement performed under specific rig site conditions; well remained stable.
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