Method and apparatus for estimating a property of a downhole...

Measuring and testing – Borehole or drilling – During drilling

Reexamination Certificate

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Reexamination Certificate

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07421892

ABSTRACT:
A method and apparatus for estimating a property of a fluid downhole are disclosed. The apparatus includes a coated flexural resonator disposed in the downhole fluid. The resonator is coated to reduce effects of adhering surfactants suspended in the downhole fluid. The method uses the coated resonator to estimate a property of the downhole fluid.

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