What Is An Oil Rig Welder? Oil rig welding is the procedure of joining the metal structures of oil wells. Generally, these structures have distinct shapes and sizes. Oil rig welding is also known as underwater welding. https://ptt.edu/blog/what-is-an-oil-rig-welder-how-to-become-one/ welding training school in Philadelphia, welder training school in philadelphia, Welding Trade Programs in south philadelphia east,