(19)

(11)

EP 3 417 141 A1

(12)

(43) Date of publication: 26.12.2018 Bulletin 2018/52 (21) Application number: 17752735.5 (22) Date of filing: 17.02.2017

(51) International Patent Classification (IPC):  E21B 7/20(2006.01) E02D 7/28(2006.01) (86) International application number: PCT/FI2017/050106 (87) International publication number: WO 2017/140956 (24.08.2017 Gazette 2017/34)

(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: 17.02.2016 FI 20165116 (71) Applicant: Geonex Oy 95600 Ylitornio (FI)	(72) Inventor: JUVANI, Kimmo 95600 Ylitornio (FI) (74) Representative: Kolster Oy Ab  (Salmisaarenaukio 1) P.O. Box 204 00181 Helsinki 00181 Helsinki (FI)