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(11)

EP 2 718 063 A1

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(43) Date of publication: 16.04.2014 Bulletin 2014/16 (21) Application number: 12796938.4 (22) Date of filing: 07.06.2012

(51) International Patent Classification (IPC):  B25D 9/14(2006.01) E21B 1/26(2006.01) B25D 9/16(2006.01) (86) International application number: PCT/FI2012/050568 (87) International publication number: WO 2012/168559 (13.12.2012 Gazette 2012/50)

(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 (30) Priority: 07.06.2011 FI 20115549 (71) Applicant: Sandvik Mining and Construction Oy 33330 Tampere (FI)	(72) Inventors: SAUKKO, Pekka FI-33330 Tampere (FI) KOSKIMÄKI, Antti FI-33330 Tampere (FI) MUUTTONEN, Timo FI-33330 Tampere (FI) HIETAKARI, Teemu FI-33330 Tampere (FI) MÄKI, Jorma FI-33330 Tampere (FI) (74) Representative: Kolster Oy Ab  Iso Roobertinkatu 23 PO Box 148 00121 Helsinki 00121 Helsinki (FI)