(19)
(11) EP 2 556 208 A1

(12)

(43) Date of publication:
13.02.2013 Bulletin 2013/07

(21) Application number: 11766724.6

(22) Date of filing: 07.04.2011
(51) International Patent Classification (IPC): 
E21B 36/04(2006.01)
(86) International application number:
PCT/US2011/031565
(87) International publication number:
WO 2011/127272 (13.10.2011 Gazette 2011/41)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 09.04.2010 US 322664 P

(71) Applicants:
  • Shell Oil Company
    Houston, TX 77252-2463 (US)

    SM 
  • Shell Internationale Research Maatschappij B.V.
    2596 HR The Hague (NL)

(72) Inventors:
  • BASS, Ronald Marshall
    Houston Texas 77019 (US)
  • REMEY, Edward Everett de St.
    Katy Texas 77494 (US)
  • HARLEY, Robert Guy
    Spring Texas 77379 (US)

(74) Representative: Matthezing, Robert Maarten et al
Shell International B.V. Intellectual Property Services P.O. Box 384
2501 CJ The Hague
2501 CJ The Hague (NL)

   


(54) HELICAL WINDING OF INSULATED CONDUCTOR HEATERS FOR INSTALLATION