Definition(s)
Gall
Surface damage on threads and seals caused by localized friction.
Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
Surface damage on threads and seals caused by localized friction.
Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards