(19)

(11)

EP 2 900 899 A1

(12)

(43) Date of publication: 05.08.2015 Bulletin 2015/32 (21) Application number: 13842918.8 (22) Date of filing: 24.09.2013

(51) International Patent Classification (IPC):  E21B 25/00(2006.01) (86) International application number: PCT/AU2013/001093 (87) International publication number: WO 2014/047680 (03.04.2014 Gazette 2014/14)

(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: 25.09.2012 AU 2012904184 (71) Applicant: CT Tech Pty Ltd Mt Richon, Western Australia 6112 (AU)	(72) Inventor: BEACH, Shayne Mt Richon, Western Australia 6112 (AU) (74) Representative: Fleck, Hermann-Josef  Klingengasse 2 71665 Vaihingen/Enz 71665 Vaihingen/Enz (DE)