An offshore jack-up workover rig. The workover rig includes a vessel which may
be self powered or powered by a tug. The vessel may be raised above the surface
of a water body by extending the legs until they reach the water body bed and then
continuing to extend the legs. The workover rig contains a workover floor unit
which includes at least a drawworks, a drawworks motor, and a well aperture. The
workover rig is detachably mounted on an extensible cantilevered frame. The frame
may be extended to position the workover floor unit over an offshore platform to
be serviced. The workover floor unit is also configured to mover laterally relative
to the extensible frame. The vessel is also provided with a crane. The crane may
be used to lift the detachable workover floor unit from the vessel and deposit
it, including its equipment, on the platform.
