(19)
(11) EP 0 174 328 A1

(12)

(43) Date of publication:
19.03.1986 Bulletin 1986/12

(21) Application number: 85901042.0

(22) Date of filing: 01.03.1985
(51) International Patent Classification (IPC): 
E21B 47/ 12( . )
G01D 1/ 16( . )
G01V 3/ 28( . )
G01B 7/ 287( . )
G01D 3/ 06( . )
(86) International application number:
PCT/GB1985/000085
(87) International publication number:
WO 1985/004005 (12.09.1985 Gazette 1985/20)
(84) Designated Contracting States:
AT BE CH DE FR GB LI LU NL SE

(30) Priority: 02.03.1984 GB 19840005532

(71) Applicant: HANSON RESEARCH LIMITED
Clanfield Oxon OX8 2RX (GB)

(72) Inventor:
  • ATHERTON, Eric, John
    Oxon, OX8 2RX (GB)

   


(54) MEASUREMENT USING ELECTRICAL TRANSDUCERS