Method and apparatus for detecting entrained gases in fluids
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United States of America Patent
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Jan 21, 1986
Grant Date -
N/A
app pub date -
Jan 20, 1984
filing date -
Jan 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus and method for detecting the level of gases entrained within a circulating drilling fluid used in subterranean well operations are disclosed. Detection of incipient gas kicks during drilling operations is accomplished by detecting the level of entrained gases. A gas-air sample is gathered at the surface of the well, and a gas-air sample having a constant relative humidity is delivered at a constant volumetric flow rate to gas sensors. Dilution air is automatically added to the sample when the gas concentration exceeds a known limit. Automatic periodic calibration of the sensors is provided. Stable signals from the gas sensor are obtained at two distinct flow rates.
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