PUB-LTD Co. Gilsonite plays an important role in drilling fluid that we mentioned 9 items of them as following:Fluid loss control and seepageLost circulation materialShale stabilizationIncreasing wellbore stabilityDifferential sticking minimizingDeveloping effective filter cakeOil-based and Water-based drilling mud additiveUses in HP-HT operationsSignificant reduction HSE risk