(19)

(11)

EP 2 614 212 A2

(12)

(88) Date of publication A3: 26.10.2012 (43) Date of publication: 17.07.2013 Bulletin 2013/29 (21) Application number: 11775841.7 (22) Date of filing: 08.09.2011

(51) International Patent Classification (IPC):  E21B 17/03(2006.01) E21B 21/02(2006.01) (86) International application number: PCT/IB2011/053928 (87) International publication number: WO 2012/032485 (15.03.2012 Gazette 2012/11)

(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: 09.09.2010 SE 1050930 (71) Applicant: Atlas Copco Secoroc AB 737 25 Fagersta (SE)	(72) Inventors: WESSBERG, Johan S-737 42 Fagersta (SE) SÄVENSTRAND, Filip S-737 32 Fagersta (SE) (74) Representative: Valea AB  Box 7086 103 87 Stockholm 103 87 Stockholm (SE)