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Wellbore Quality Characterization for Drilling and Casing Running in ...

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Limitation of MWD Survey Tools<br />

MWD survey tool crosses the trough or valley of a spiral hole.<br />

Incl<strong>in</strong>ation <strong>and</strong> direction of the drift is be<strong>in</strong>g measured.<br />

This effect is called “micro-tortuosity”

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