(19)

(11)

EP 3 303 764 A1

(12)

(43) Date of publication: 11.04.2018 Bulletin 2018/15 (21) Application number: 16803826.3 (22) Date of filing: 03.06.2016

(51) International Patent Classification (IPC):  E21B 43/241(2006.01) E21B 43/24(2006.01) E21B 36/04(2006.01) E21B 43/30(2006.01) (86) International application number: PCT/NO2016/050115 (87) International publication number: WO 2016/195511 (08.12.2016 Gazette 2016/49)

(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: 05.06.2015 GB 201509772 (71) Applicant: Statoil ASA 4035 Stavanger (NO)	(72) Inventors: WESENBERG, Margrete Hånes 7054 Ranheim (NO) KOWALEWSKI, Espen 7092 Tiller (NO) (74) Representative: Stevens, Jason Paul  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)