semisubmersible rig


[sem-ee-suhb-mur-suh-buhl, sem-ahy-]
Also called semisubmersible rig. a self-propelled barge that is mounted on partially submerged legs supported by underwater pontoons, rides at anchor, and serves as a work base and living quarters in deep offshore drilling operations.
of, for, or pertaining to a semisubmersible.

1960–65; semi- + submersible Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
semisubmersible rig
Sometimes shortened to: semisubmersible (in the oil industry) a type of drilling platform that floats supported by underwater pontoons, with much of its structure below the water line for stability in high winds: usually used only for exploratory drilling for oil or gas

Collins English Dictionary - Complete & Unabridged 10th Edition
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