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:
Mar. 01, 2016
Filed:
May. 19, 2011
Laurent Delattre, Saint-Saulve, FR;
Herve Marchebois, Valenciennes, FR;
Michel Piette, Valenciennes, FR;
Christoph Bosch, Dortmund, DE;
Michaela Hoerstemeier, Duesseldorf, DE;
Joachim Konrad, Duesseldorf, DE;
Laurent Delattre, Saint-Saulve, FR;
Herve Marchebois, Valenciennes, FR;
Michel Piette, Valenciennes, FR;
Christoph Bosch, Dortmund, DE;
Michaela Hoerstemeier, Duesseldorf, DE;
Joachim Konrad, Duesseldorf, DE;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
A steel contains, by weight: C: 0.3% to 0.5%, Si: 0.1% to 0.5%, Mn: 1% or less, P: 0.03% or less, S: 0.005% or less, Cr: 0.3% to 1%, Mo: 1% to 2%, W: 0.3% to 1%, V: 0.03% to 0.25%, Nb: 0.01% to 0.15%, Al: 0.01% to 0.1%, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel can be used to produce seamless tubes for hydrocarbon wells with a yield strength after heat treatment of 862 MPa or more or even 965 MPa or more.