E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/3
E21B 47/06 (2006.01) E21B 21/08 (2006.01) E21B 47/10 (2006.01) E21B 49/00 (2006.01) G01N 29/024 (2006.01)
Patent
CA 1199264
A SYSTEM FOR DETECTING A NATIVE RESERVOIR FLUID IN A WELL BORE Abstract of the Disclosure In order to detect the presence of a native reservoir fluid within a well bore, an auxiliary drilling fluid is injected into the borehole and recovered after it has circulated within the borehole. The detection system comprises a pressure-wave generator, an upstream pressure sensor for detecting the pressure wave as it passes through a first pipe in which the auxiliary drilling fluid circulates in the uncontaminated state, an outlet pressure sensor for detecting the pressure wave as it passes through a second pipe in which the auxiliary drilling fluid circulates and may be contaminated by a reservoir fluid which has entered the drilling fluid at any point of the well bore.
432240
Berge Christian
Cordier Bernard
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Societe Nationale Elf Aquitaine
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