Downhole fluid filter

Wells – Processes – Sampling well fluid

Reexamination Certificate

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Details

C166S100000, C175S058000, C073S152250

Reexamination Certificate

active

07997341

ABSTRACT:
An apparatus for testing a subterranean formation penetrated by a wellbore, comprising a tool having a sample flow line an inlet disposed with the tool and configured to establish fluid communication between the formation and the sample flow line to draw a fluid sample into the sample flow line, and an active filter positioned in the sample flow line and providing a filter flow route and a bypass flow route in the sample flow line.

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