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(11)

EP 2 029 423 A1

(12)

(43) Date of publication: 04.03.2009 Bulletin 2009/10 (21) Application number: 06757801.3 (22) Date of filing: 16.06.2006

(51) International Patent Classification (IPC):  B63B 39/00(2006.01) E21B 19/09(2006.01) E21B 19/00(2006.01) B66D 1/52(2006.01) (86) International application number: PCT/NL2006/000296 (87) International publication number: WO 2007/145503 (21.12.2007 Gazette 2007/51)

(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 NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (71) Applicant: Itrec B.V. 3115 HH Schiedam (NL)	(72) Inventors: ROODENBURG, Joop NL-2612 HA Delft (NL) VAN DUIVENDIJK, Pieter, Dirk, Melis Missoury City, TX 77459 (US) (74) Representative: Brookhuis, Hendrik Jan Arnold  Exter Polak & Charlouis B.V. P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL)