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Offshore<br />
28 29<br />
“Manoeuvering a<br />
huge drilling rig in<br />
confi ned quarters”<br />
Drilling Rig Turned Round<br />
In 2008 <strong>Mammoet</strong> USA started the roll-on<br />
operation of the 8,000 ton Tarzan 4 offshore<br />
drilling rig in Orange, Texas, USA. <strong>Mammoet</strong><br />
used 226 lines of SPMTs and 56 lines of<br />
Goldhofers.<br />
The rig was supported on stands which<br />
had to be removed as each trailer row was<br />
positioned underneath the rig. Once all the<br />
trailers had been positioned, the rig was<br />
driven to a less congested part of the client’s<br />
yard where it was turned 180 degrees so<br />
that it could be rolled onto the barge. The<br />
rig was then manoeuvered around existing<br />
structures, while simultaneously dealing<br />
with areas of poor ground preparation.<br />
The roll-on took approximately eight hours<br />
until the rig was set down on the barge.<br />
LOCATION: ORANGE, TEXAS, USA<br />
JOB: ROTATION AND ROLL-ON OF A RIG<br />
CHALLENGE: CONGESTED SITE,<br />
POOR GROUND
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