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(11)

EP 2 981 633 A2

(12)

(88) Date of publication A3: 24.12.2014 (43) Date of publication: 10.02.2016 Bulletin 2016/06 (21) Application number: 14713509.9 (22) Date of filing: 31.03.2014

(51) International Patent Classification (IPC):  C22C 26/00(2006.01) E21B 10/567(2006.01) E21B 10/00(2006.01) (86) International application number: PCT/EP2014/056463 (87) International publication number: WO 2014/161818 (09.10.2014 Gazette 2014/41)

(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: 31.03.2013 GB 201305871 (71) Applicant: Element Six Abrasives S.A. 1255 Luxembourg (LU)	(72) Inventors: KANYANTA, Valentine Didcot Oxfordshire OX11 0QR (GB) KASONDE, Maweja Didcot Oxfordshire OX11 0QR (GB) BALOYI, Rodwell 1559 Springs (ZA) (74) Representative: Reeve, Anna Elizabeth et al Element Six Limited Group Intellectual Property Fermi Avenue Harwell Campus Didcot Oxfordshire OX11 0QR Didcot Oxfordshire OX11 0QR (GB)