Oil Companies Getting Ready For Hurricane Gustav

Schematic of typical Gulf of Mexico offshore oil or gas platform.

Katrina Lessons in Mind, Oil Companies Prep
Platforms for Gustav -- Popular Mechanics

HOUSTON — When Hurricane Katrina roared through the Gulf of Mexico three years ago, it ripped the drilling rig atop Royal Dutch Shell's Mars platform from its clamps and slammed it back onto the top deck in a crumpled pile of steel.

But the company's Ursa platform, just 7 miles to the east, emerged unscathed as 80-foot waves and 175-mph winds hammered the region.

A storm doesn't necessarily wreak havoc on all installations it touches, said Peter Marshall, a retired Shell engineer and consultant, as operators continued preparations Thursday for Tropical Storm Gustav's expected move into the energy-rich gulf.

Some structures may get the brunt while others don't, or a storm may expose an unanticipated weakness.

In the case of the two Shell structures, the platforms themselves withstood the storm, Marshall said. The damage at Mars stemmed from clamps and bolts that failed to hold its drilling rig to beams. The repaired rig now has stronger clamps.

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