(19)

(11)

EP 2 459 841 A2

(12)

(88) Date of publication A3: 09.02.2012 (43) Date of publication: 06.06.2012 Bulletin 2012/23 (21) Application number: 10731780.2 (22) Date of filing: 22.06.2010

(51) International Patent Classification (IPC):  E21B 33/12(2006.01) E21B 47/01(2012.01) G01V 5/00(2006.01) (86) International application number: PCT/GB2010/001219 (87) International publication number: WO 2011/012838 (03.02.2011 Gazette 2011/05)

(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 SE SI SK SM TR (30) Priority: 31.07.2009 GB 0913293 (71) Applicant: Swellfix B.V. 2288 EG Rijswijk (NL)	(72) Inventors: WATLEY, Daniel Essex CM3 4RN (GB) McROBB, Graeme Altens AB12 3HT (GB) (74) Representative: Docherty, Andrew John et al Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)