What does a CT scanner have to do with safer drilling operations? The answer may surprise you. Researchers at NETL are combining their unparalleled expertise with unexpected tools like CT scanners to investigate a material that prevents leaks and spills during oil and gas drilling operations—foamed cement. To most people, cement is the material of buildings, roads, bridges, sidewalks, and security barriers. However, cement also plays a critical role in the safe recovery of oil and gas from wellbores beneath oceans and land sites around the world. Foamed cements are ultralow-density systems that are used during oil and gas drilling operations to encase production tubes and prevent leaks and spills. The “foam” part of the cement is created by injecting inert gas into cement slurries to create millions of microscopic bubbles. NETL’s foamed cement research has been recognized around the world as one of the best sources for reliable information about the performance of foamed cements in oil and gas wellbores. The increased use of foamed cement systems in high-stress environments makes understanding its stability in the wellbore vital.