(19)

(11)

EP 3 060 742 A1

(12)

(43) Date of publication: 31.08.2016 Bulletin 2016/35 (21) Application number: 13895833.5 (22) Date of filing: 22.10.2013

(51) International Patent Classification (IPC):  E21B 10/38(2006.01) E21B 10/60(2006.01) E21B 10/26(2006.01) E21B 21/00(2006.01) (86) International application number: PCT/FI2013/000041 (87) International publication number: WO 2015/059341 (30.04.2015 Gazette 2015/17)

(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 (71) Applicant: Tri-Mach Oy 33100 Tampere (FI)	(72) Inventor: PAASONEN, Hannu FI-37100 Nokia (FI) (74) Representative: Kolster Oy Ab  Iso Roobertinkatu 23 PO Box 148 00121 Helsinki 00121 Helsinki (FI)