(19)

(11)

EP 2 795 032 A1

(12)

(43) Date of publication: 29.10.2014 Bulletin 2014/44 (21) Application number: 12858853.0 (22) Date of filing: 18.12.2012

(51) International Patent Classification (IPC):  E21B 1/00(2006.01) E21B 6/00(2006.01) E21B 4/06(2006.01) E21B 6/04(2006.01) (86) International application number: PCT/NZ2012/000240 (87) International publication number: WO 2013/095164 (27.06.2013 Gazette 2013/26)

(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 (30) Priority: 19.12.2011 NZ 59719711 02.02.2012 US 201261594072 P (71) Applicant: Flexidrill Limited Takapuna, Auckland 0627 (NZ)	(72) Inventors: WEST, Gregory Donald Timaru 7910 (NZ) CUNLIFFE, Mark Christopher Timaru 7971 (NZ) (74) Representative: Boult Wade Tennant  Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)