Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

Riser

marine

A conducting pipe connecting sub-sea wellheads, templates or pipelines to the equipment located on a buoyant or fixed offshore structure, (ABS).

Example: A large-diameter pipe that connects the drill floor of a floating rig to the wellhead. The drill string and drilling tools pass through it and mud is returning to the rig.