OIL WELL STEEL PIPE TO BE PLACED UNDER GROUND AND BE EXPANDED

An oil well steel pipe to be placed under the ground and be expanded, which comprises a steel having a chemical composition in mass % that C: 0.05 to 0. 45 %, Si: 0.1 to 1.5 %, Mn: 0.1 to 3.0 %, P: 0.03 % or less, S: 0.01 % or less, sol Al: 0.05 % or less, and the balance: Fe and impurities, with th...

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Bibliographic Details
Main Authors ARAI, YUJI, AMAYA, HISASHI
Format Patent
LanguageEnglish
French
Published 09.12.2004
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
METALLURGY
TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:An oil well steel pipe to be placed under the ground and be expanded, which comprises a steel having a chemical composition in mass % that C: 0.05 to 0. 45 %, Si: 0.1 to 1.5 %, Mn: 0.1 to 3.0 %, P: 0.03 % or less, S: 0.01 % or less, sol Al: 0.05 % or less, and the balance: Fe and impurities, with the proviso that the amount of N forming a solid solution in the steel is 40 ppm or less . The steel may also contain one or more of specific amounts of V, Ti, Nb, B, Cr, Mo, Ni, Cu and Ca in addition to the above composition. The oil well ste el pipe is excellent in the resistance to the sulfide stress cracking after bei ng expanded.
Bibliography:Application Number: CA20042527117