Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis
Reexamination Certificate
2005-09-06
2005-09-06
Williams, Hezron (Department: 2856)
Measuring and testing
Borehole or drilling
Fluid flow measuring or fluid analysis
C073S054410, C073S152160, C073S152470, C073S152580, C175S040000, C175S050000
Reexamination Certificate
active
06938470
ABSTRACT:
The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate in a hydrocarbon producing well. The present invention additionally provides a method and apparatus for monitoring cleanup from a leveling off of viscosity or density over time, measuring or estimating bubble point for formation fluid, measuring or estimating dew point for formation fluid, and determining the onset of asphaltene precipitation. The present invention also provides for intercalibration of plural pressure gauges used to determine a pressure differential downhole.
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Bergren Paul
DiFoggio Rocco
Walkow Arnold
Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Rogers David A.
Williams Hezron
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