DuraMod is a high-performance rheological additive for drilling fluids, suitable for various types of fluids. It effectively prevents barite sag in high-temperature and extended-reach wells. This specially formulated modifier enhances suspension properties and exhibits excellent ultra-low-shear performance. It can be used with different base oils and synthetic fluids, including specialized drilling fluid systems. DuraMod is essential for preventing settling and can be mixed with sufficient shear for optimal rheological properties. Recommended concentrations vary depending on the application, ranging from 1.0 to 9.0 lbm/bbl, and pilot testing is advised.