(19)

(11)

EP 2 923 029 A2

(12)

(88) Date of publication A3: 24.12.2014 (43) Date of publication: 30.09.2015 Bulletin 2015/40 (21) Application number: 13789322.8 (22) Date of filing: 12.11.2013

(51) International Patent Classification (IPC):  E21B 23/04(2006.01) E21B 41/00(2006.01) E21B 34/16(2006.01) (86) International application number: PCT/EP2013/073576 (87) International publication number: WO 2014/072521 (15.05.2014 Gazette 2014/20)

(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 Designated Extension States: BA ME (30) Priority: 12.11.2012 NO 20121327 (71) Applicant: FMC Kongsberg Subsea AS 3601 Kongsberg (NO)	(72) Inventors: LØKKA, Trond N-3679 Notodden (NO) HAMILTON, Scott Lanark ML11 9FF (GB) (74) Representative: Onsagers AS  P.O. Box 1813 Vika 0123 Oslo 0123 Oslo (NO)