(19)

(11)

EP 1 627 128 A1

(12)

(43) Date of publication: 22.02.2006 Bulletin 2006/08 (21) Application number: 04727480.8 (22) Date of filing: 15.04.2004

(51) International Patent Classification (IPC):  E21B 10/30(1980.01) (86) International application number: PCT/AU2004/000496 (87) International publication number: WO 2004/099555 (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 AU 2003902189 07.11.2003 WO PCT/AU03/01485 (71) Applicant: Extreme Machining Australia PTY Ltd Gillman, South Australia 5013 (AU)	(72) Inventor: KENNEDY, John, Francis St Agnes, South Australia 5097 (AU) (74) Representative: Allsop, John Rowland  MacLeod Allsop Island House Lower High Street Burford Oxfordshire OX18 4RR Burford Oxfordshire OX18 4RR (GB)