(19)
(11) EP 2 049 765 A1

(12)

(43) Date of publication:
22.04.2009 Bulletin 2009/17

(21) Application number: 07813549.8

(22) Date of filing: 30.07.2007
(51) International Patent Classification (IPC): 
E21B 33/06(2006.01)
E21B 33/03(2006.01)
(86) International application number:
PCT/US2007/074762
(87) International publication number:
WO 2008/014517 (31.01.2008 Gazette 2008/05)
(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
Designated Extension States:
AL BA HR MK RS

(30) Priority: 28.07.2006 US 820723 P
28.09.2006 US 847760 P
20.10.2006 US 862392 P
19.04.2007 US 912809 P
27.07.2007 US 829811
27.07.2007 US 829697
27.07.2007 US 829707
27.07.2007 US 829752

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

(72) Inventor:
  • KHANDOKER, Shafiq
    Houston, TX 77041 (US)

(74) Representative: Gray, Thomas et al
GE International Inc. London Patent Operation 15 John Adam Street
London WC2N 6LU
London WC2N 6LU (GB)

   


(54) METHOD OF DESIGNING BLOWOUT PREVENTER SEAL USING FINITE ELEMENT ANALYSIS