(19)

(11)

EP 3 737 826 A1

(12)

(43) Date of publication: 18.11.2020 Bulletin 2020/47 (21) Application number: 18900028.4 (22) Date of filing: 18.12.2018

(51) International Patent Classification (IPC):  E21B 10/48(2006.01) B23B 51/04(2006.01) E21B 10/02(2006.01) (86) International application number: PCT/NO2018/050317 (87) International publication number: WO 2019/139486 (18.07.2019 Gazette 2019/29)

(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: KH MA MD TN (30) Priority: 12.01.2018 NO 20180054 (71) Applicant: Comrod AS 4120 Tau (NO)	(72) Inventor: FJELDE, Ole Gunnar 4120 TAU (NO) (74) Representative: Håmsø Patentbyrå AS  P.O. Box 171 4301 Sandnes 4301 Sandnes (NO)