| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.4 ( December 1981 ) Special Issue on Steel Pipe ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of Anti-SSC OCTG and Collapse Resistant OCTG
Kei-ichiro Takitani, Sadao Hasuno, Akio Ejima, Hiroaki Kawasaki, Yoshikazu Kitahaba, Hiroshi Nishi |
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Synopsis : An increasing energy demand has stimulated a considerable development of high strength oil country tubular goods (OCTG) with superior resistance to sulfide stress corrosion cracking (SSC) and/or collapse failure in hostile environments. The experimental trials of modified Cr-Mo steel casing have proved that addition of Mo up to 1.0%, Nb and B to 0.2-0.3% C steels, product 90 ksi(63.3kgf/mm2) yield strength pipe with superior SSC resistance. Multiple regression analysis has been conducted to estimate the effects of various factors concerning the collapse of casing pipe and it has been demonstrated that residual stress of finished pipe is one of the most significant factors. This report summarizes some metallurgical aspects in the manufacturing process of these special grades of OCTG. |
| TextiPDF: 9p./269kbj |