Apparatus and method for protecting devices, especially fibre optic devices, in hostile environments
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United States of America Patent
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Aug 27, 2002
Issued Date -
N/A
app pub date -
Aug 14, 2000
filing date -
Dec 17, 1998
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Abstract
The present invention relates to protecting optical devices, such as an optical fibre sensor connected in series with a cable, from a hostile environment, such as encountered when making measurements in oil and gas wells. A liquid can protect the optical device. Packaging an optical fibre sensor inside a capillary containing the liquid can provide this protection. The liquid can be liquid metal, gel, inks, grease or oil. The liquid metal can be gallium or indium, or an alloy that includes indium and/or gallium. The grease can contain lithium, molybdenum, or synthetics, or be synthetic grease. The liquid can contain other components such as a scavenger or getter for molecules and/or ions.
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