(19)

(11)

EP 2 855 824 A2

(12)

(88) Date of publication A3: 30.05.2014 (43) Date of publication: 08.04.2015 Bulletin 2015/15 (21) Application number: 13716753.2 (22) Date of filing: 03.04.2013

(51) International Patent Classification (IPC):  E21B 4/06(2006.01) E21B 10/36(2006.01) E21B 7/06(2006.01) (86) International application number: PCT/EP2013/057046 (87) International publication number: WO 2013/150078 (10.10.2013 Gazette 2013/41)

(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: 05.04.2012 IE S120176 (71) Applicant: Mincon International Ltd. Co. Clare (IE)	(72) Inventor: PURCELL, Joseph Oakleigh Wood Co. Clare (IE) (74) Representative: Catesby, Olivia Joanne et al Tomkins & Co. 5 Dartmouth Road Dublin 6 Dublin 6 (IE)