(19)

(11)

EP 1 812 614 A1

(12)

(43) Date of publication: 01.08.2007 Bulletin 2007/31 (21) Application number: 05799601.9 (22) Date of filing: 04.11.2005

(51) International Patent Classification (IPC):  C22C 38/44(2006.01) E21B 17/00(2006.01) (86) International application number: PCT/SE2005/001661 (87) International publication number: WO 2006/049572 (11.05.2006 Gazette 2006/19)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 04.11.2004 SE 0402698 (71) Applicant: Sandvik Intellectual Property AB 811 81 Sandviken (SE)	(72) Inventors: KANGAS, Pasi S-811 36 Sandviken (SE) JAKOBSSON, Karin S-811 33 Sandviken (SE) (74) Representative: Olsson, Jan et al Bjerkéns Patentbyra KB P.O.Box 1274 801 37 Gävle 801 37 Gävle (SE)