Definition(s)
FN
Ferrite Number.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
Ferrite Number.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards