(19)
(11) EP 2 089 556 A2

(12)

(88) Date of publication A3:
16.04.2009

(43) Date of publication:
19.08.2009 Bulletin 2009/34

(21) Application number: 07841597.3

(22) Date of filing: 30.08.2007
(51) International Patent Classification (IPC): 
C22C 38/26(2006.01)
C21D 1/04(2006.01)
(86) International application number:
PCT/US2007/077202
(87) International publication number:
WO 2008/045631 (17.04.2008 Gazette 2008/16)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

(30) Priority: 06.10.2006 US 850216 P

(71) Applicants:
  • Exxonmobile Upstream Research Company
    Houston TX 77098-2189 (US)
  • JFE Steel Corporation
    Tokyo (JP)

(72) Inventors:
  • KOO, Jayoung
    Sommerset, NJ 08873 (US)
  • BANGARU, Narasimha, V.
    Pittstown, NJ 088867 (US)
  • JIN, Hyun-Woo
    Easton, PA 18040 (US)
  • OZEKCIN, Adnan
    Bethlehem, PA 18017 (US)
  • AYER, Raghavan
    Clinton, NJ 08809 (US)
  • FAIRCHILD, Douglas, P.
    Sugar Land, TX 77479 (US)
  • BEESON, Danny, L.
    Doha, Qatar (US)
  • HOYT, Douglas, S.
    The Woodlands, TX 77382 (US)
  • LEBLEU, James, B., Jr.
    Houston, TX 77006 (US)
  • ENDO, Shigeru
    Chiyoda-ku, Tokyo, 100-0011 (JP)
  • OKATSU, Mitsuhiro
    Chiyoda-ku, Tokyo, 100-0011 (JP)
  • KAKIHARA, Shinichi
    Chiyoda-ku, Tokyo, 100-0011 (JP)

(74) Representative: Ljungberg, Robert 
Baker Botts (UK) LLP 41 Lothbury
London EC2R 7HF
London EC2R 7HF (GB)

   


(54) LOW YIELD RATIO DUAL PHASE STEEL LINEPIPE WITH SUPERIOR STRAIN AGING RESISTANCE