(19)

(11)

EP 2 893 133 A2

(12)

(88) Date of publication A3: 07.08.2014 (43) Date of publication: 15.07.2015 Bulletin 2015/29 (21) Application number: 13765393.7 (22) Date of filing: 09.09.2013

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) (86) International application number: PCT/GB2013/052358 (87) International publication number: WO 2014/037748 (13.03.2014 Gazette 2014/11)

(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: 07.09.2012 GB 201216036 (71) Applicant: FISHER, Hugh, Edward Dalrymple, Ayrshire KA6 6BA (GB)	(72) Inventor: FISHER, Hugh, Edward Dalrymple, Ayrshire KA6 6BA (GB) (74) Representative: Campbell, Arlene  IPentus Limited The Old Manse Wilsontown, By Forth Lanark, ML11 8EP Wilsontown, By Forth Lanark, ML11 8EP (GB)