(19)

(11)

EP 2 205 815 A1

(12)

(43) Date of publication: 14.07.2010 Bulletin 2010/28 (21) Application number: 08832320.9 (22) Date of filing: 22.09.2008

(51) International Patent Classification (IPC):  E21B 17/042(2006.01) E21B 17/08(2006.01) (86) International application number: PCT/SE2008/000522 (87) International publication number: WO 2009/038520 (26.03.2009 Gazette 2009/13)

(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 Designated Extension States: AL BA MK RS (30) Priority: 22.09.2007 SE 0702142 (71) Applicant: Svenska Borr Ab 135 50 Tyresö (SE)	(72) Inventor: EDMAN, östen S-135 50 Tyresö (SE) (74) Representative: Bjelkstam, Peter  Radjursvägen 11 131 42 Nacka 131 42 Nacka (SE)