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EP 2 864 589 A1

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(43) Date of publication: 29.04.2015 Bulletin 2015/18 (21) Application number: 13807163.4 (22) Date of filing: 12.06.2013

(51) International Patent Classification (IPC):  E21B 47/001(2012.01) E21B 33/076(2006.01) G01N 33/24(2006.01) E21B 19/14(2006.01) E21B 41/04(2006.01) G01V 3/18(2006.01) (86) International application number: PCT/AU2013/000625 (87) International publication number: WO 2013/188903 (27.12.2013 Gazette 2013/52)

(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: 22.06.2012 AU 2012902644 (71) Applicant: Nautilus Minerals Pacific Pty Ltd Milton, QLD 4073 (AU)

(72) Inventors: LEACH, Stuart Milton, Queensland 4064 (AU) STEVENSON, Ian Milton, Queensland 4064 (AU) PLUNKETT, Sean Milton, Queensland 4064 (AU) DEVAUX, Melanie New Westminster, British Columbia V3M 1E5 (CA) HAMPTON, Peter New Westminster, British Columbia V3M 1E5 (CA) JACKSON, Eric New Westminster, British Columbia V3M 1E5 (CA) (74) Representative: EP&C  P.O. Box 3241 2280 GE Rijswijk 2280 GE Rijswijk (NL)