casinghead gasglossary / CASINGHEAD GAS casinghead gas. Oil & gas. Natural gas in a liquid solution with crude oil, produced at the casinghead (top) of an oil well. • Casinghead gas separates from the oil at the time of production or shortly afterward. 词条贡献者 译者黎川,毕业于世界顶级翻译学院,擅长翻译各种与专利与技术诉讼相关的法律文件。