(19)

(11)

EP 2 732 123 A2

(12)

(88) Date of publication A3: 05.12.2013 (43) Date of publication: 21.05.2014 Bulletin 2014/21 (21) Application number: 12753175.4 (22) Date of filing: 16.07.2012

(51) International Patent Classification (IPC):  E21B 17/05(2006.01) (86) International application number: PCT/GB2012/051692 (87) International publication number: WO 2013/011293 (24.01.2013 Gazette 2013/04)

(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: 15.07.2011 GB 201112239 (71) Applicant: Tercel Oilfield Products Uk Ltd Portlethen Aberdeen Aberdeenshire AB12 4YB (GB)	(72) Inventors: HYLAND, Ross Aberdeen Aberdeenshire AB10 6HY (GB) POLLOCK, Ian Insch Aberdeenshire AB52 6SA (GB) HANTON, John Aberdeen Aberdeenshire AB21 7BL (GB) MARR, Graeme Thomas Inverurie Aberdeenshire AB51 8SP (GB) (74) Representative: Ostyn, Frans et al KOB NV Patents President Kennedypark 31C 8500 Kortrijk 8500 Kortrijk (BE)