| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.19 ( November 1988 ) Steel Pipe ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Development of High Strength C110 Grade Steel
and 13% Cr Stainless Steel for OCTG
in Corrosive
Wells Kunihiro Kobayashi, Kuniaki Motoda, Takao Kurisu, Toshikazu Masuda, Takao Kawade, Hiroshi Oka |
| Synopsis: In sour oil wells, where the danger of sulfide stress cracking (SSC) exists, OCTG with YS levels of up to 95 ksi are conventionally used. To meet higher strength requirements, C110 grade OCTG was developed using a high C, low alloy steel, providing an SSC threshold stress above 90% of the specified minimum yield strength. In sweet wells, where severe weight loss corrosion occurs, 13% Cr stainless steel is widely used. A new method for manufacturing 13% Cr tubulars by the Mannesmann rolling process instead of hot extrusion was developed, and tubulars with good dimension accuracy were produced. Corrosion properties and SSC resistance in CO2 and H2S environments were studied in comparison with other steels. |
| TextiPDF: 7P/326kbj |