(19)

(11)

EP 1 474 589 A1

(12)

(43) Date of publication: 10.11.2004 Bulletin 2004/46 (21) Application number: 03704791.7 (22) Date of filing: 14.02.2003

(51) International Patent Classification (IPC)7: E21B 29/06, E21B 7/06 (86) International application number: PCT/GB2003/000666 (87) International publication number: WO 2003/069114 (21.08.2003 Gazette 2003/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR Designated Extension States: AL LT LV MK RO (30) Priority: 15.02.2002 GB 0203641 (71) Applicant: Target Well Control Aberdeen AB12 4YA (GB)	(72) Inventors: WEBSTER, Stephen West Yorkshire BD20 9EX (GB) MCCLURE, Paul Aberdeen AB12 5EL (GB) (74) Representative: Cooper, John et al Murgitroyd & Company165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)