Selection and Evaluation of Oil Country Tubular Goods for Sour Corrosion Environment

The factors which should be considered when OCTG (oil country tubular goods) are selected for acid gas corrosion environment were analyzed.The OCTG selection and evaluation system including 11 detailed factors within 3 broad categories was established.A certain weight was assigned to 11 detailed factors.The performance of OCTG used in common acid gas corrosion environment and the applicable conditions were subdivided and scored according to 4 grades.Utilizing weight coefficient method which calculated the scores of OCTG used in common acid gas corrosion environment was applied to a certain engineering.Therefore the advantages and disadvantages of OCTG in the engineering could be compared and the applicability was judged.