(19)

(11)

EP 2 627 864 A2

(12)

(88) Date of publication A3: 20.06.2013 (43) Date of publication: 21.08.2013 Bulletin 2013/34 (21) Application number: 11782199.1 (22) Date of filing: 13.10.2011

(51) International Patent Classification (IPC):  E21B 43/14(2006.01) E21B 43/38(2006.01) E21B 43/30(2006.01) (86) International application number: PCT/GB2011/051982 (87) International publication number: WO 2012/049511 (19.04.2012 Gazette 2012/16)

(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: 14.10.2010 GB 201017397 (71) Applicant: Apec Ltd Aberdeen, Aberdeenshire AB14 0PJ (GB)	(72) Inventor: TYRIE, Jeremy James Aberdeen Aberdeenshire AB14 0PJ (GB) (74) Representative: Campbell, Arlene  IPentus Limited The Old Manse Wilsontown, By Forth Lanark, ML11 8EP Wilsontown, By Forth Lanark, ML11 8EP (GB)