(19)

(11)

EP 2 867 438 A1

(12)

(43) Date of publication: 06.05.2015 Bulletin 2015/19 (21) Application number: 13810172.0 (22) Date of filing: 25.06.2013

(51) International Patent Classification (IPC):  E21B 19/15(2006.01) (86) International application number: PCT/SE2013/050760 (87) International publication number: WO 2014/003646 (03.01.2014 Gazette 2014/01)

(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 Designated Extension States: BA ME (30) Priority: 28.06.2012 SE 1250727 (71) Applicant: Atlas Copco Craelius AB 195 82 Märsta (SE)	(72) Inventor: GUSTAVSSON, Rickard S-194 63 Upplands Väsby (SE) (74) Representative: Ehrner & Delmar Patentbyrå AB  Box 10316 100 55 Stockholm 100 55 Stockholm (SE)