Original oil and gas trade magazine vintage ad for NATIONAL LEAD COMPANY of Houston, TX. Baroid Division. Stop Water Invasion with Baroid's Oil Mud. Treatment resulted in successful completion of a Matagorda County, Texas well. Completion was in dirty Frio sands. Close examination of this method of protecting potentially productive zones can be the answer to difficult or previously impossible completion problems. This unique 1962 old oilfield petroleum drilling industry magazine advertisement would display beautifully matted and framed. Two-page gatefold advertisement.