(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