(19)

(11)

EP 2 776 766 A2

(12)

(88) Date of publication A3: 22.08.2013 (43) Date of publication: 17.09.2014 Bulletin 2014/38 (21) Application number: 12786974.1 (22) Date of filing: 09.11.2012

(51) International Patent Classification (IPC):  F24J 3/08(2006.01) E21B 19/24(2006.01) E21B 7/04(2006.01) (86) International application number: PCT/EP2012/072332 (87) International publication number: WO 2013/068570 (16.05.2013 Gazette 2013/20)

(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: 11.11.2011 GB 201119470 07.09.2012 GB 201215986 (71) Applicant: Greenfield Master IPCO Limited St. Helier Jersey JE2 3QG (GB)	(72) Inventors: STEWART, James Jonathan 1862 EK Bergen NH (NL) ARDIS, Michael Lewis Worcester WR2 5DL (GB) (74) Representative: Jenkins, Peter David  Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)