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Figure 2.13 – Vetco uniflex joint cross section.
(Courtesy Vetco)
The drilling riser joints may be connected by any number
of means, including welding, threading, snap rings, segmented
locking dogs, and bolted flanges. The requirements for fast
makeup and disconnect, rigid pressure- tight connections, minimal
stress variance, compactness and light weight for minimum
tensioning and buoyancy needs, and easy maintenance must all be
considered. Usually, the female (box) portion contains dogs or ring
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