MPD Annular

Definition(s)


MPD Annular

A device installed in the drilling riser below the RCD to make possible removing and replacing a worn RCD sealing/bearing element while back-pressure is being applied. MPD annular may be used to isolate the RCD during emergencies such as a gas in riser event.

Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards