Drilling in hard conditions take good tools and a clear plan. Unlike sand and clay, the spoils or cuttings from drilling rock, gravel, and other hard material require an additive specifically developed to suspend larger spoils and cuttings within the mud mix. Ground Control® XAN is an anionic polymer designed to encapsulate and suspend and float heavier cuttings out of the borehole. As an effective viscosifier, it also reduces friction and offers increase hole stability for a smooth pullback.