(19)

(11)

EP 2 723 963 A1

(12)

(43) Date of publication: 30.04.2014 Bulletin 2014/18 (21) Application number: 12804551.5 (22) Date of filing: 25.06.2012

(51) International Patent Classification (IPC):  E21B 7/04(2006.01) G01V 3/165(2006.01) E21B 47/022(2012.01) (86) International application number: PCT/FI2012/000033 (87) International publication number: WO 2013/001139 (03.01.2013 Gazette 2013/01)

(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: 27.06.2011 FI 20110213 (71) Applicant: Aineko OY 29100 Harjavalta (FI)	(72) Inventor: RITAMÄKI, Pekka FI-33820 Tampere (FI) (74) Representative: Nieminen, Taisto Tapani  Patenttitoimisto T. Nieminen Oy P.O. Box 65 33201 Tampere 33201 Tampere (FI)