A Jack Up drilling rig having a deck capable of being used offshore made of
a cantilever which is mounted so as to be moveable in a first direction
and a second direction, a Multi Purpose Tower fixably mounted on the
cantilever, a supporting cart disposed between the cantilever and the deck
of the Jack Up drilling rig, and at least four friction reducing devices,
wherein the Jack-Up drilling rig is also used in methods for installing
and decommissioning drilling equipment on a sub-sea well.
