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→Floaters
* They are held on location by anchors or [[dynamic positioning]].
* They are held on location by anchors or [[dynamic positioning]].
* The [[drill string]] and riser are isolated from wave motion by motion compensators.
* The [[drill string]] and riser are isolated from wave motion by motion compensators.
* The wellheads and [[Blowout preventer|BOP]]s are on the ocean bottom and are connected to the rig by a riser to allow circulation of [[drilling mud]].
* The wellheads and [[Blowout preventer|BOP]]s are on the ocean bottom and are connected to the rig by a riser to allow circulation of [[Drilling fluid|drilling mud]].
There are two categories of floaters: semisubmersibles and drill ships.
There are two categories of floaters: semisubmersibles and drill ships.