(19)

(11)

EP 4 055 246 A1

(12)

(43) Date of publication: 14.09.2022 Bulletin 2022/37 (21) Application number: 20885346.5 (22) Date of filing: 03.11.2020

(51) International Patent Classification (IPC):  E21B 25/00(2006.01) E21B 17/02(2006.01) E21B 47/00(2012.01) G01N 33/28(2006.01) E21B 25/02(2006.01) E21B 49/00(2006.01) G01N 33/24(2006.01) (52) Cooperative Patent Classification (CPC): E21B 47/01 (86) International application number: PCT/AU2020/051196 (87) International publication number: WO 2021/087558 (14.05.2021 Gazette 2021/19)

(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 Designated Validation States: KH MA MD TN (30) Priority: 04.11.2019 AU 2019101339 04.11.2019 AU 2019261684 (71) Applicant: Axis Mining Technology Pty Ltd Canning Vale, WA 6155 (AU)	(72) Inventors: WALLIS, Nick Canning Vale, Western Australia 6155 (AU) MUNYARD, Clifford Shane Canning Vale, Western Australia 6155 (AU) (74) Representative: LBP Lemcke, Brommer & Partner Patentanwälte mbB  Siegfried-Kühn-Straße 4 76135 Karlsruhe 76135 Karlsruhe (DE)