GILSONITE-DEEP WATER DRILLING GILSONITE-DEEP WATER DRILLING GILSONITE IMPROVES PERFORMANCE, EXTENDS THERMAL LIFE AND REDUCED COST IN DEEPWATER DRILLING. Natural Bitumen has been proven safe and effective in more than 60 years of oilfield performance. Gilsonite is a safe, naturally occurring hydrocarbon resin with unique chemical properties. Added to drilling fluids, it increases performance and reduces cost […]