(19)

(11)

EP 1 404 942 A1

(12)

(43) Date of publication: 07.04.2004 Bulletin 2004/15 (21) Application number: 02751305.0 (22) Date of filing: 11.07.2002

(51) International Patent Classification (IPC)7: E21B 17/01, F03G 7/05, E02B 9/04, B63B 35/44 (86) International application number: PCT/GB2002/003184 (87) International publication number: WO 2003/006783 (23.01.2003 Gazette 2003/04)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 12.07.2001 GB 0117016 (71) Applicant: Phoenix Beattie Limited Ashington,Northumberland NE63 8UW (GB)	(72) Inventor: BRINK, Burghard 21073 Hamburg (DE) (74) Representative: Gordon, Naoise Padhraic Edward et al Murgitroyd & Company165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)