GILSONITE / NATURAL BITUMEN IN CEMENTING  GILSONITE IS AN EFFECTIVE LOST CIRCULATION MATERIAL THAT ASSURES ZONAL ISOLATION AND REDUCES ENVIRONMENTAL RISK. As the challenges presented by today’s wellbore configurations increase, a properly designed cementing process is critical to keeping the wellbore isolated, protected and environmentally sound.  For more than 50 years, the industry has depended on Gilsonite as a lost circulation material and a critical component for primary cementing operations in some of the world’s toughest drilling environments. Adding Gilsonite during cementing operations...