This view of the first workover unit from across the yard shows the cantilever beam, fluids tanks, transverse beams, BOP stack, the rig floor and derrick. The yellow top-drive unit lies on its side near the bottom of the V-door ramp.
Although the wide-angle lens makes the workover rig on the left appear to be leaning, it's not -- it's simply difficult to capture both units in a single frame.
Looking down from above, one can see the compartmentalized fluids tanks suspended between the cantilever beams. A network of valves and piping allows a wide range of completion and workover fluid-handling set-ups. The unit's red Cameron 10,000-psi BOP stack stands in the foregound; it is lifted into position by trolley cranes mounted on beams below the rig floor.
Viewed from the floor of the first rig, it's easy to see how the second rig's substructure attaches to the underlying transverse beams.
The driller's cabin on the rig floor is connected to a network of computer controllers around the rig.
Seeing double -- The second Remedial Offshore workover rig (right) is a 'twin' to the assembled unit being comissioned at left.
And soon there will be two: Remedial Offshore's first workover rig is being commissioned in the background while its second rig is being assembled.
After the crane operator set the second workover rig's floor in-place atop the legs and beam assemblies, workers in manlifts pinned the floor into position.
The workover rig for Remedial Offshore's first ESV unit was being rigged-up on May 8, 2009, when this photo was taken. The rig's legs are anchored on transverse beams which rest atop the vessel's cantilever beams in this image (and fluids tanks are suspended between the beams).
The workover rig sstructure sits in its full configuration atop its transverse beams (with cantilever beams and fluids tanks out-of-view below the frame). The top of the "doubles" derrick is 55 meters (~185 feet) above ground level.
With the rig floor in-place, other equipment (driller's cabin, drawworks, pumps, the BOP accumlators, etc.) can be lifted into position and installed.
Here the rig floor is lifted into position atop the legs, but without much floor equipment yet in-place. Dangling from I-beams below the floor are the heavy-duty trolleys for lifting and moving the BOP stack into place when the unit is rigged-up offshore.
This Remedial Offshore hand is tightening one of the footings used to secure the rig's legs to the transverse beams.
A yard crane was used to set the rig's transverse beams on the much larger cantilever beams, above the fluids tanks suspended between them. During ESV operations, the vessel's 300-ton pedestal crane will handle these lifts.