Minimum diameter that allows for the passage of the drift.
Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Device that measurers the amount of fluid entering and leaving a line or vessel system.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
“Meter” means an instrument for measuring and indicating or recording the volumes of gases or liquids.
Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations