Definition(s)
Air Can Buoyancy
Uplift applied to the riser string by the net buoyancy from air (or other fluid) trapped in the air can.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards
Air Can Buoyancy
Tension applied to the riser string by the net buoyancy of an air chamber created by a closed top, open bottom cylinder forming an air filled annulus around the outside of the riser pipe.
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
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