(19)

(11)

EP 3 555 410 A1

(12)

(43) Date of publication: 23.10.2019 Bulletin 2019/43 (21) Application number: 17883635.9 (22) Date of filing: 19.12.2017

(51) International Patent Classification (IPC):  E21B 10/02(2006.01) E21B 10/36(2006.01) E21B 7/24(2006.01) E21B 10/26(2006.01) E21B 10/46(2006.01) (86) International application number: PCT/IB2017/058089 (87) International publication number: WO 2018/116140 (28.06.2018 Gazette 2018/26)

(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 Designated Extension States: BA ME Designated Validation States: MA MD TN (30) Priority: 19.12.2016 NZ 16727700 (71) Applicant: Flexidrill Limited Hauraki, Auckland 0622 (NZ)	(72) Inventors: WEST, Greg Wanaka 9305 (NZ) SCHICKER, Owen Marchwiel Timaru 7910 (NZ) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)