E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
73/124, 166/2, 7
E21B 44/00 (2006.01) E21B 49/00 (2006.01) G01N 33/00 (2006.01)
Patent
CA 1228746
TITLE: GAS DETECTION IN SUBTERRANEAN WELLS ABSTRACT OF THE DISCLOSURE Apparatus and method for detecting the level of gases entrained within a circulating drilling fluid used in subter- ranean 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.
468330
Baker Drilling Equipment Company
Borden Ladner Gervais Llp
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