(19)

(11)

EP 3 390 762 A1

(12)

(43) Date of publication: 24.10.2018 Bulletin 2018/43 (21) Application number: 16754302.4 (22) Date of filing: 23.08.2016

(51) International Patent Classification (IPC):  E21B 15/00(2006.01) E21B 15/02(2006.01) (86) International application number: PCT/EP2016/069859 (87) International publication number: WO 2017/102109 (22.06.2017 Gazette 2017/25)

(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 Designated Validation States: MA MD (30) Priority: 18.12.2015 NO 20151749 (71) Applicant: Odfjell Drilling AS 5863 Bergen (NO)	(72) Inventors: STANGHELLE, Rune N-5257 Kokstad (NO) KLEPSVIK, Håkon 5232 Paradis (NO) BORSHOLM, Thomas 5223 Nesttun (NO) (74) Representative: Onsagers AS  P.O. Box 1813 Vika 0123 Oslo 0123 Oslo (NO)