Definition(s)
Subsea Fillup Valve
A special riser joint having a valve means to allow the riser annulus to be opened to the sea. To prevent riser pipe collapse, the valve may be opened by an automatic actuator controlled by a differential-pressure sensor.
Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards
Subsea Fill-Up Valve
Special riser joint having a valve means to allow the riser annulus to be opened to the sea. NOTE To prevent riser pipe collapse, the valve can be opened by an automatic actuator controlled by a differential pressure sensor.
Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global Standards