(19)

(11)

EP 2 525 930 A2

(12)

(88) Date of publication A3: 13.10.2011 (43) Date of publication: 28.11.2012 Bulletin 2012/48 (21) Application number: 11701377.1 (22) Date of filing: 18.01.2011

(51) International Patent Classification (IPC):  B22F 1/00(2006.01) E21B 10/58(2006.01) E21C 35/193(2006.01) C22C 1/00(2006.01) E21B 10/567(2006.01) (86) International application number: PCT/EP2011/050616 (87) International publication number: WO 2011/089117 (28.07.2011 Gazette 2011/30)

(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: 20.01.2010 GB 201000869 (71) Applicant: Element Six Holding GmbH 36151 Burghaun (DE)	(72) Inventors: HEIDERICH, Ernst 36151 Burghaun (DE) RIES, Bernd, Heinrich 36151 Burghaun (DE) LACHMANN, Frank, Friedrich 36151 Burghaun (DE) (74) Representative: Reeve, Anna Elizabeth  Element Six Limited 3rd Floor, Building 4, Chiswick Park 566 Chiswick High Road GB-London W4 5YE GB-London W4 5YE (GB)