G - Physics – 01 – N
Patent
G - Physics
01
N
73/69
G01N 27/00 (2006.01)
Patent
CA 1217652
DRILLING FLUID GAS TESTING SYSTEM AND METHOD Abstract of the Disclosure An apparatus and an associated method are provided for substantially continuously measuring and monitoring the relative concentration of combustible gases contained within the drilling mud that returns to the earth surface of an earth borehole while it is being drilled by a drilling rig employing liquid drilling fluid or mud to transport the cuttings, The apparatus includes a means to continuously extract a gas sample from the returning drilling mud flow and supply the sample to a measuring device where the relative concentration of combustible gas is measured and an electrical output signal produced. The electrical output signal is used to derive an electrical data signal repre- sentative of the relative concentration of combustible gases in the gas sample. A numerical representation of the electrical data signal is displayed for interpretation by the drilling rig operator. In the method of this invention. the gas sample is taken from a flow of drilling mud at the earth surface and passed through the measuring device that includes a catalytic sensor to produce an electrical output signal. The sensor output signal is used to derive an electrical data signal that is processed to derive a numerical display indicative of the relative combustible gas concentration in the drilling mud.
467222
Buckley Peter
Ladendorf Douglas W.
Dresser Industries Inc.
Macrae & Co.
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