E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/10 (2006.01) E21B 17/12 (2006.01) E21B 49/08 (2006.01) G01N 29/02 (2006.01) G01N 29/22 (2006.01) G01N 29/20 (1990.01)
Patent
CA 2071988
2071988 9110132 PCTABS00006 A system for detecting escape of gas from a borehole (3) comprises an array of ultrasonic emitters (7) and absorption detectors (8) on opposite sides of the borehole (3), an ultrasonic Doppler-shift detector (4), and a gas collector (30) surrounding the drill pipe (1) to intercept at least a proportion of gas escaping from the borehole (3). The gas collector concentrates the gas through a chimney (32) in which are provided a gas analyser (33) and a gas flow meter (34).
Smith George E.
Young Gareth J.
Electro-Flow Controls Limited (by Affidavit)
Fetherstonhaugh & Co.
George E. Smith To Electro-Flow Controls Limited
George E. Smith To; Premier Research And Development Limited
Premier Consolidated Oilfields Public Limited Company To; Premie
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