Definition(s)
CML
Controlled Mud Level.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
CML
A variant of Dual Gradient Drilling (DGD) used only on floating rigs by placing a special pump in/on the drilling riser to vary the level of fluid in the drilling riser. The fluid level is adjusted up or down to control bottom-hole pressure and to compensate for variations in equivalent circulating density due to frictional pressure losses.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
CML
Condition monitoring location.
Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards
Condition monitoring locations (CMLs)
Designated areas on pressure vessels where periodic examinations are conducted. Previously, they were normally referred to as “thickness monitoring locations (TMLs)”.
Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global Standards