Definition(s)
NBS
National Bureau of Standards.
Source: API SPEC 13A, Specification for Drilling Fluids Materials, Eighteenth Edition, February 2010. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
National Bureau of Standards.
Source: API SPEC 13A, Specification for Drilling Fluids Materials, Eighteenth Edition, February 2010. Global Standards