Alloys or metallic compositions – Containing over 50 per cent metal but no base metal – Iron containing
Reexamination Certificate
2006-12-18
2010-02-09
Yee, Deborah (Department: 1793)
Alloys or metallic compositions
Containing over 50 per cent metal but no base metal
Iron containing
C420S583000, C420S059000, C420S065000, C420S066000, C420S074000, C148S329000, C148S619000, C148S620000, C148S707000, C148S708000, C148S442000, C148S327000, C148S606000
Reexamination Certificate
active
07658883
ABSTRACT:
Novel carbon-plus-nitrogen corrosion-resistant ferrous and austenitic alloys, apparatus incorporating an inventive alloy, and methods of making and using the apparatus are described. The corrosion-resistant ferrous and austenitic alloys comprise no greater than about 4 wt. % nickel, are characterized by a strength greater than about 700 MPa (100 ksi), and, when being essentially free of molybdenum (<0.3 wt. %), have minimum Pitting Resistance Equivalence (PRE) numbers of 20 and minimum Measure of Alloying for Corrosion Resistance numbers (MARC) of 30 because of the use of both carbon and nitrogen. The ferrous and austenitic alloys are particularly formulated for use in oilfield operations, especially sour oil and gas wells and reservoirs. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.
REFERENCES:
patent: 2698785 (1955-01-01), Jennings
patent: 3880654 (1975-04-01), Hartline, III
patent: 4919728 (1990-04-01), Kohl
patent: 5094812 (1992-03-01), Dulmaine
patent: 5480609 (1996-01-01), Dupoiron
patent: 5841046 (1998-11-01), Rhodes
patent: 6168755 (2001-01-01), Biancaniello
patent: 6454879 (2002-09-01), Aigner
patent: 2004/0258554 (2004-12-01), Radon
patent: 2005/0047952 (2005-03-01), Coleman
patent: 2005/0145308 (2005-07-01), Saller
patent: 2006/0034724 (2006-02-01), Hamano
patent: 3940438 (1991-05-01), None
patent: 19607828 (2003-06-01), None
patent: 0694626 (1996-01-01), None
patent: 1051529 (2001-12-01), None
patent: 1626101 (2006-02-01), None
patent: 60-39150 (1985-02-01), None
“Mechanical Properties of Carbon and Alloy Steels, Effects of Alloying Elements”, pp. 220-221, Metals Handbook, Second Edition, 1998.
Rawers, J. C., “Characterizing alloy additions to carbon high-nitrogen steel”, Proceedings of the Institution of Mechanical Engineers, Journal of Materials: Design and Applications, vol. 218, No. I3, pp. 239-246 (Aug. 2004).
Gavriljuk, et al., “Nitrogen and carbon in austenitic and martensitic steels: atomic interactions and structural stability”, Materials Science Forum, vol. 426-432, Part 2, pp. 943950 (2003).
Balanyuk, et al., “Mössbauer study and thermodynamic modeling of Fe-C-N alloy”, Acta Materialia, vol. 48, No. 15, pp. 3813-3821 (Sep. 2000).
Jargelius-Pettersson, R.F., “Application of the pitting resistance equivalent concept to some highly alloyed austenitic stainless steels”, Corrosion (USA), vol. 54, No. 2, pp. 162-168. (Feb. 1998).
Bhavsar Rashmi
Marya Manuel
Edmonds & Nolte, P.C.
Kurka James L.
Schlumberger Technology Corporation
Welch Jeremy P.
Yee Deborah
LandOfFree
Interstitially strengthened high carbon and high nitrogen... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interstitially strengthened high carbon and high nitrogen..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstitially strengthened high carbon and high nitrogen... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4185778