DocumentCode
1549463
Title
Low drift fibre optic pressure sensor for oil field downhole monitoring
Author
Clowes, J. ; Edwards, J. ; Grudinin, I. ; Kluth, E.L.E. ; Varnham, M.P. ; Zervas, M.N. ; Crawley, C.M. ; Kutlik, R.L.
Author_Institution
Sensor Dynamics Ltd., Winchester, UK
Volume
35
Issue
11
fYear
1999
fDate
5/27/1999 12:00:00 AM
Firstpage
926
Lastpage
927
Abstract
Pressure sensors made of silica optical fibre change their zero offset (drift) by large amounts when exposed to fluids under high temperature and pressure. Molecular water diffusion from the fluid into the silica is the cause of this drift. The effect of commercially available ´hermetic´ coatings in preventing water ingress into fibres under such extreme conditions has been investigated. Application of the most effective coating to a pressure sensor has improved the drift rate by a factor of 200.
Keywords
monitoring; drift rate; extreme conditions; hermetic coatings; high pressure; high temperature; low drift fibre optic pressure sensor; molecular water diffusion; oil field downhole monitoring; silica optical fibre; water ingress; zero offset;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19990646
Filename
785407
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