semisubmersible rig in the Oil and Gas IndustryPowered by COBUILD (sɛmisəbmɜrsəbəl rɪg)
Word forms: (regular plural) semisubmersible rigs
(Extractive engineering: Offshore) A semisubmersiblerig is a drilling rig which is designed to be partly under the water. ⇒ The semisubmersible rig has an elevated drilling platform on top of a floating structure which is semisubmerged in the water. ⇒ The semisubmersible rigs float with their lower hulls between 55 and 90 feet below the water line, and are held in place partly with anchors. ⇒ A semisubmersible rig is a drilling rig which is designed to be partly under the water.