(19)

(11)

EP 1 144 794 A2

(12)

(43) Date of publication: 17.10.2001 Bulletin 2001/42 (21) Application number: 99928157.9 (22) Date of filing: 01.07.1999

(51) International Patent Classification (IPC)7: E21B 1/00 (86) International application number: PCT/GB9902/088 (87) International publication number: WO 0001/915 (13.01.2000 Gazette 2000/02)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 01.07.1998 GB 9814114 (71) Applicant: ABB Offshore Systems Limited Bristol BS48 1BS (GB)	(72) Inventors: JONES, David, John Gloucestershire GL11 5JS (GB) WINCHESTER, John, Nigel Bristol BS39 7RZ (GB) STEWART, David, Henry North Somerset BS49 4RG (GB) (74) Representative: Newstead, Michael John et al Page HargraveSouthgateWhitefriarsLewins Mead Bristol BS1 2NT Bristol BS1 2NT (GB)
	Remarks: WIPO A3 publication data is not currently available.