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By C.M. Schillmoller, reprinted from World Oil, 1988. Stainless steels and nickel-base alloys are increasingly utilized in the oil and gas industry for exploitation of sour crudes. Traditionally, nickel-alloys and copper-nickel alloys have served the industry well for sucker rods, instrumentation, packers, valves for gas lift, pumpshafts, seawater piping, heat exchange tubing and other critical components. New generation platforms, deep sour gas wells, carbon dioxide-enhanced oil recovery projects, and production in the Arctic, all now make use of the specialty chromium-nickel-molybdenum stainless steels and the nickel-chromium-molybdenum alloys in extremely severe corrosive applications. Examples are cited and an economic analysis provided, as well as several suggestions for reducing the weight of platforms' topside construction, and guidelines provided for selection of alloys to reliably resist the aggressive corrosive environments.

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