(19)

(11)

EP 2 494 144 A2

(12)

(88) Date of publication A3: 13.10.2011 (43) Date of publication: 05.09.2012 Bulletin 2012/36 (21) Application number: 10771147.5 (22) Date of filing: 29.10.2010

(51) International Patent Classification (IPC):  E21B 43/01(2006.01) (86) International application number: PCT/EP2010/066477 (87) International publication number: WO 2011/051453 (05.05.2011 Gazette 2011/18)

(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: 30.10.2009 NO 20093258 (71) Applicant: FMC Kongsberg Subsea AS 3601 Kongsberg (NO)	(72) Inventor: TØNNESEN, Leif, Arne N-1354 Bærums Verk (NO) (74) Representative: Onsagers AS  Munkedamsveien 35 P.O. Box 1813 Vika 0123 Oslo 0123 Oslo (NO)