System for detecting a native reservoir fluid in a well bore

Details System for detecting a native reservoir fluid in a well bore System for detecting a native reservoir fluid in a well bore

1983-07-11

1985-06-04

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

340861, 367 85, E21B 4710

Patent

active

045206651

ABSTRACT:
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.

REFERENCES:
patent: 2978634 (1961-04-01), Arps
patent: 3448611 (1969-06-01), Lebourg
patent: 3737843 (1973-06-01), LePeuvedic
patent: 3756076 (1973-09-01), Quichaud et al.
patent: 3867714 (1975-02-01), Patton
patent: 4184545 (1980-01-01), Claycomb
patent: 4266606 (1981-05-01), Stone

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