CASING

casing.Oil & gas. The pipe in a wellbore hole, cemented into place to prevent pollution and to protect the hole. intermediate casing.Casing that protects deep formations against pollution from drilling and producing opera-tions. production casing.Wellbore pipe through which oil and gas is produced. • Production casing is the last pipe set in the hole.surface casing.Casing that protects groundwater against pollution from drilling and producing operations. • Surface casing is the first pipe set in the hole. [Blacks Law 8th]