Method and apparatus for balanced pressure sampling

Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis

Reexamination Certificate

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C166S264000

Reexamination Certificate

active

07913554

ABSTRACT:
A method of sampling fluid from a rock formation penetrated by a borehole includes positioning a downhole tool having a flow line in the borehole, establishing an inlet port through which fluid passes from a first point in the formation into the flow line, establishing an outlet port through which fluid passes from the flow line into a second point in the formation, and passing fluid between the formation and the flow line through the inlet and outlet ports.

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