TBC-Brinadd offers systems with fluid densities ranging from 8.5 lb/gal to 17.5 lb/gal. Our systems utilize improved bridging particle distributions reduce filtration control thus depositing a denser, ultra-low permeability filter cake. Our systems provide excellent rheological properties to 250° F and can be extended to 350° F with thermal stabilizers. These systems can be used for drilling into a pay zone, underreaming, milling, and sand removal.