(19)

(11)

EP 3 014 044 A2

(12)

(88) Date of publication A3: 07.05.2015 (43) Date of publication: 04.05.2016 Bulletin 2016/18 (21) Application number: 14715874.5 (22) Date of filing: 28.03.2014

(51) International Patent Classification (IPC):  E21B 7/02(2006.01) (86) International application number: PCT/EP2014/056294 (87) International publication number: WO 2014/206587 (31.12.2014 Gazette 2014/53)

(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 (30) Priority: 27.06.2013 WO PCT/EP2013/063493 (71) Applicant: Sandvik Mining and Construction Oy 33330 Tampere (FI)	(72) Inventors: UOTILA, Jarkko FIN-33330 Tampere (FI) NURMINEN, Petri FIN-33330 Tampere (FI) TALASNIEMI, Jari FIN-33330 Tampere (FI) (74) Representative: Lyytinen, Veera Elise  Sandvik Mining and Construction Oy Pihtisulunkatu 9 33330 Tampere 33330 Tampere (FI)