(19)

(11)

EP 0 707 706 A1

(12)

(43) Date of publication: 24.04.1996 Bulletin 1996/17 (21) Application number: 94919755.0 (22) Date of filing: 04.07.1994

(51) International Patent Classification (IPC):  G01F 1/ 74( . ) (86) International application number: PCT/GB1994/001442 (87) International publication number: WO 1995/002165 (19.01.1995 Gazette 1995/04)

(84) Designated Contracting States: BE DE DK ES FR GB IE IT LU NL (30) Priority: 03.07.1993 GB 19930013818 (71) Applicant: EXPRO NORTH SEA LIMITED Dyce, Aberdeen AB2 OES (GB)	(72) Inventor: EDWARDS, Jeffrey, Charles Aberdeen AB2 0HD (GB) (74) Representative: Naismith, Robert Stewart, et al  CRUIKSHANK & FAIRWEATHER 19 Royal Exchange Square Glasgow, G1 3AE Scotland Glasgow, G1 3AE Scotland (GB)