Definition(s)
ANS
American National Standards Institute.
Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
American National Standards Institute.
Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global Standards