osion fatigue and stress corrosion cracking (SCC) of Ti alloy OCTGs in the environments of pletion fluid, the acidizing fluid and the production conditions were discussed. Moreover, the gap in the research and development of the Ti alloy OCTGs between China and foreign countries was pointed out, and the application prospect and the development trend of Ti alloy OCTGs in the well of high pressure and high temperature (HPHT) oil and gas field were also forecasted.РKey words: Ti alloy oil country tubular goods; high pressure and high temperature well; corrosion resistance; mechanical propertiesРCorresponding author: Lü Xianghong, Ph. D., Associate Professor, School of Material Science and Engineering, Xi’an Shiyou University, Xi’an 710065, P. R. China, Tel: 0086-29-88252276, E-mail: lxhong71@
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