(19)

(11)

EP 3 320 169 A1

(12)

(43) Date of publication: 16.05.2018 Bulletin 2018/20 (21) Application number: 16820562.3 (22) Date of filing: 01.07.2016

(51) International Patent Classification (IPC):  E21B 10/62(2006.01) E21B 10/20(2006.01) E21B 17/04(2006.01) E21B 10/00(2006.01) E21B 10/44(2006.01) E21D 21/00(2006.01) (86) International application number: PCT/AU2016/050577 (87) International publication number: WO 2017/004666 (12.01.2017 Gazette 2017/02)

(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: MA MD (30) Priority: 09.07.2015 AU 2015902711 (71) Applicant: Fero Group Pty Ltd Kewdale, Western Australia 6105 (AU)	(72) Inventor: MCLAREN, Matthew David Quinns Rocks, Western Australia 6030 (AU) (74) Representative: Script IP Limited  Turnpike House 18 Bridge Street Frome Somerset BA11 1BB Frome Somerset BA11 1BB (GB)