(19)

(11)

EP 2 572 042 A1

(12)

(43) Date of publication: 27.03.2013 Bulletin 2013/13 (21) Application number: 11719238.5 (22) Date of filing: 06.05.2011

(51) International Patent Classification (IPC):  E01D 15/133(2006.01) (86) International application number: PCT/EP2011/057335 (87) International publication number: WO 2011/141385 (17.11.2011 Gazette 2011/46)

(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: 14.05.2010 GB 201008074 (71) Applicant: Gurit (UK) Ltd. Newport Isle of Wight PO30 5WU (GB)	(72) Inventor: ROYLE, Thomas, John Hampshire SO18 3LH (GB) (74) Representative: Jenkins, Peter David  Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)