(19)
(11) EP 2 084 301 A1

(12)

(43) Date of publication:
05.08.2009 Bulletin 2009/32

(21) Application number: 07863840.0

(22) Date of filing: 02.11.2007
(51) International Patent Classification (IPC): 
C21D 9/00(2006.01)
(86) International application number:
PCT/US2007/083493
(87) International publication number:
WO 2008/085600 (17.07.2008 Gazette 2008/29)
(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: 02.11.2006 US 555984
23.01.2007 US 626148
01.03.2007 US 680860
01.03.2007 US 680982

(71) Applicant: Hydril USA Manufacturing LLC
Houston, TX 77032 (US)

(72) Inventors:
  • HUFF, Philip, A.
    Spring, TX 77379 (US)
  • PRUDEN, Keith
    Katy, TX 77450 (US)

(74) Representative: Dossmann, Gérard 
Bureau D.A. Casalonga & Josse Bayerstrasse 71/73
80335 München
80335 München (DE)

   


(54) HIGH PRESSURE-RATED RAM BLOWOUT PREVENTER AND METHOD OF MANUFACTURE