Flexible piezoelectric for downhole sensing, actuation and health monitoring
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United States of America Patent
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Jun 26, 2007
Grant Date -
Oct 14, 2004
app pub date -
Apr 8, 2003
filing date -
Apr 8, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Thin flexible piezoelectric transducers are bonded to or imbedded into oilfield tubular members or structural members. The transducers may be used to telemeter data as acoustic waves through the members. By proper spacing of transducers and phasing of driving signals, the transmitted signals can be directionally enhanced or encoded to improve transmission efficiency. The transducers may be used for health monitoring of the tubular or structural members to detect cracks, delaminations, or other defects. The flexible transducers are very thin so that overall dimensions of tubular or structural members are essentially unchanged by incorporation of the transducers.
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