(19)

(11)

EP 2 126 226 A1

(12)

(43) Date of publication: 02.12.2009 Bulletin 2009/49 (21) Application number: 08712591.0 (22) Date of filing: 20.02.2008

(51) International Patent Classification (IPC):  E02D 7/16(2006.01) E02D 7/08(2006.01) E21B 15/00(2006.01) E02D 7/20(2006.01) E21B 7/02(2006.01) (86) International application number: PCT/NL2008/000051 (87) International publication number: WO 2008/103031 (28.08.2008 Gazette 2008/35)

(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 MT NL NO PL PT RO SE SI SK TR (30) Priority: 20.02.2007 NL 1033428 (71) Applicants: Aribema B.V. 3118 LP Schiedam (NL) Adviesbureau Leeuwerke B.V. 9675 TV Winschoten (NL)	(72) Inventors: VAN HATTEM, Arie NL-3118 LP Schiedam (NL) LEEUWERKE, Fenno, Harm NL-9675 TV Winschoten (NL) (74) Representative: van Kooij, Adriaan et al Arnold & Siedsma Sweelinckplein 1 NL-2517 GK Den Haag NL-2517 GK Den Haag (NL)