(19)

(11)

EP 2 286 037 A1

(12)

(43) Date of publication: 23.02.2011 Bulletin 2011/08 (21) Application number: 09724951.0 (22) Date of filing: 23.03.2009

(51) International Patent Classification (IPC):  E03B 3/26(2006.01) E21B 43/08(2006.01) E21B 43/04(2006.01) (86) International application number: PCT/NL2009/050136 (87) International publication number: WO 2009/120070 (01.10.2009 Gazette 2009/40)

(84) Designated Contracting States: 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 SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 22.03.2008 NL 1035200 26.02.2009 NL 2002570 (71) Applicant: Visser & Smit Hanab Bv 3356 LJ Papendrecht (NL)	(72) Inventor: SCHOENMAKERS, Lukas NL-3356 LJ Papendrecht (NL) (74) Representative: Assendelft, Jacobus H.W.  Keukenhofdreef 20 2161 AZ Lisse 2161 AZ Lisse (NL)