The most accurate method for measuring drilling mud required to fill the hole when drill stem is removed is by use of a __________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — trip tank
A trip tank is a small, calibrated mud tank used to monitor the volume of fluid required to fill the hole while pulling the drill string. Because the drill string displaces volume, accurately measuring the mud needed to fill the void is the most precise method for detecting influxes.
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