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Application filed by Сумитомо Метал Индастриз, Лтд.filedCriticalСумитомо Метал Индастриз, Лтд.
Publication of UA90216C2publicationCriticalpatent/UA90216C2/en
The invention relates to the oil well pipe for pipe expansion which is to be expanded in a well. The oil well pipe has both a chemical composition which contains by mass C: 0.05 to 0.08 %, Si: 0.50 % or below, Mn: 0.80 to 1.30 %, P: 0.030 % or below, S: 0.020 %. or below, Cr: 0.08 to 0.50 %, N: 0.01 % or below, Al: 0.005 to 0.06 %, Ti: 0.05 % or below, Cu: 0.50 % or below, and Ni: 0.50 % or below with the balance being Fe and impurities and a structure having a ferrite content of 80 % or above. Further, the oil well pipe exhibits a yield strength of 276 to 379 MPa and a uniform elongation of 16 % or above, thus being excellent in pipe expandability.
UAA200811651A2007-03-302008-03-14Pipe of oil gage for expanded in well and method for its prduction
UA90216C2
(en)