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 法律翻译Jian,毕业于新加坡知名法学院,专注翻译各类与证券诉讼有关的法律文件。