semisubmersible rig

noun

1. (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 Sometimes shortened tosemisubmersible

Example Sentences

Explosions rocked the rig on the evening of April 20th, 2010, after the ultra-deepwater semisubmersible rig Deepwater Horizon had just completed drilling another exploratory well.

From The Verge

The semisubmersible rig was drilling some of the 16 gas wells in the Mariscal Sucre offshore natural gas project.

From Reuters