The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2010
Filed:
Sep. 29, 2008
Taro Ohe, Osaka, JP;
Keiichi Nakamura, Osaka, JP;
Hideki Takabe, Osaka, JP;
Toshiharu Abe, Osaka, JP;
Tomoki Mori, Osaka, JP;
Masakatsu Ueda, Osaka, JP;
Taro Ohe, Osaka, JP;
Keiichi Nakamura, Osaka, JP;
Hideki Takabe, Osaka, JP;
Toshiharu Abe, Osaka, JP;
Tomoki Mori, Osaka, JP;
Masakatsu Ueda, Osaka, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
An oil country tubular good for expansion according to the invention is expanded in a well. The oil country tubular good for expansion has a composition containing, in percentage by mass, 0.05% to 0.08% C, at most 0.50% Si, 0.80% to 1.30% Mn, at most 0.030% P, at most 0.020% S, 0.08% to 0.50% Cr, at most 0.01% N, 0.005% to 0.06% Al, at most 0.05% Ti, at most 0.50% Cu, and at most 0.50% Ni, and the balance consisting of Fe and impurities, and a structure having a ferrite ratio of at least 80%. The oil country tubular good for expansion has a yield strength in the range from 276 MPa to 379 MPa and a uniform elongation of at least 16%. Therefore, the oil country tubular good according to the invention has a high pipe expansion characteristic.