(19)

(11)

EP 3 292 269 A2

(12)

(88) Date of publication A3: 05.01.2017 (43) Date of publication: 14.03.2018 Bulletin 2018/11 (21) Application number: 16722683.6 (22) Date of filing: 16.05.2016

(51) International Patent Classification (IPC):  E21B 43/34(2006.01) E21B 37/00(2006.01) E21B 43/017(2006.01) (86) International application number: PCT/EP2016/060948 (87) International publication number: WO 2016/188783 (01.12.2016 Gazette 2016/48)

(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: 22.05.2015 GB 201508818 (71) Applicant: Fourphase AS 5211 Os (NO)	(72) Inventors: AREFJORD, Anders 5217 Hagavik (NO) BRUNTVEIT, Joergen 5073 Bergen (NO) LYNGBOE, Karl Ole Daviksnes 5216 Lepsoey (NO) MCCANN, Dominic Patrick Romsey Hampshire SO51 9LN (GB) (74) Representative: Jenkins, Peter David  Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)