(19)

(11)

EP 2 776 191 A1

(12)

(43) Date of publication: 17.09.2014 Bulletin 2014/38 (21) Application number: 12791711.0 (22) Date of filing: 08.11.2012

(51) International Patent Classification (IPC):  B22F 3/20(2006.01) B24D 3/06(2006.01) C22C 26/00(2006.01) E21B 10/00(2006.01) (86) International application number: PCT/EP2012/072148 (87) International publication number: WO 2013/068469 (16.05.2013 Gazette 2013/20)

(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: 09.11.2011 GB 201119329 09.11.2011 US 201161557790 P (71) Applicant: Element Six Limited County Clare (IE)	(72) Inventor: EGAN, David Patrick County Clare (IE) (74) Representative: Fletcher Watts, Susan J. et al Element Six Limited Group Intellectual Property Fermi Avenue Harwell Campus Didcot Oxfordshire OX11 0QR Didcot Oxfordshire OX11 0QR (GB)