Definition(s)
Thrust Collar
Structural member for transmitting the vertical force from buoyancy modules to the riser to help restrain the buoyancy modules from moving along the riser joint.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards
Thrust Collar
A device for transmitting the buoyant force of a buoyancy module to the riser joint.
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
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