Caisson-type platform rig Definition


Caisson-type platform rig:

A rigid offshore drilling platform that stands on steel caissons and is used to drill development wells.

The caissons are firmly affixed to the seafloor, and the drilling and production decks are laid on top of them.

The platform is used in certain arctic waters, where the caissons are needed to protect equipment from moving ice.

See platform rig.