Corrosion-resistant alloys for hot, deep, sour wells; Properties and experience

Nickel-based, corrosion-resistant alloys (CRA's) were subjected to extensive corrosion testing and evaluation for potential use in hot, deep, sour wells. The Ni-Cr-Mo-W system was used in sour-gas wells in south Mississippi, Wyoming, and Mobile Bay. Corrosion data, mechanical properties, and resistance to environmental stress cracking are described for several oil country tubular goods (OCTG). Better understanding of metallurgical factors and of the role of alloying for enhanced resistance to corrosion, along with advanced in materials processing, are reviewed in terms of their impact on OCTG product reliability, improved safety, and cost-effectiveness