Definition(s)
Riser Main Tube (Riser Pipe)
The seamless or electric welded pipe which forms the principal conduit of the riser joint. The riser main tube is the conduit for guiding the drill string and containing the return fluid flow from the well.
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
Riser Main Tube
The basic pipe from which riser joints are fabricated.
Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards
Riser Main Tube
Seamless or electric-welded pipe that forms the principal conduit of the riser joint. NOTE The riser main tube is the conduit for guiding the drillstring and containing the return fluid flow from the well.
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