REALUBRI®Graphite is a high efficiency lubricant made by special process with natural Graphite as raw material and appropriate coating agent and surfactant. REALUBRI®Graphite can be used in water-based drilling fluid to effectively reduce the friction between drill pipe and borehole wall, drill pipe and casing, drill pipe and drilling fluid, but has no effect on the rheology and filtration performance of drilling fluid. It is especially suitable for horizontal Wells, extended-reach Wells, side track drilling and highly deviated Wells.