A marine riser segment which includes a riser joint having a threaded coupling at each end and flanges disposed on an exterior of the joint. Each of the flanges is coupled to the joint by a bearing. The flanges including openings therein for auxiliary conduits, so that the conduit joint is connectible to another such joint by relative rotation of corresponding ones of the threaded couplings, while the flanges remain rotationally fixed.
https://app.acclaimip.com/pdf/rAa0F_pQv1gYBrRyH1C_VHMPQHKlvbYO-AkOOq0/US6419277B1
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