Definition(s)
Closed Circulation System
A drilling fluid system flow path which is not open to the atmosphere.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
A drilling fluid system flow path which is not open to the atmosphere.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards