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(11)

EP 1 623 073 A1

(12)

(43) Date of publication: 08.02.2006 Bulletin 2006/06 (21) Application number: 04731648.4 (22) Date of filing: 07.05.2004

(51) International Patent Classification (IPC):  E01B 26/00(1968.09) E01B 2/00(1968.09) (86) International application number: PCT/GB2004/001952 (87) International publication number: WO 2004/099502 (18.11.2004 Gazette 2004/47)

(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 PL PT RO SE SI SK TR (30) Priority: 07.05.2003 GB 0310517 (71) Applicant: Middleton, Jonathan Bestwood Village, Nottinghamshire BG6 8XA (GB)	(72) Inventor: Middleton, Jonathan Bestwood Village, Nottinghamshire BG6 8XA (GB) (74) Representative: Ede, Eric et al Kennedys Patent 185 St Vincent Street Glasgow G2 5QD Glasgow G2 5QD (GB)