Length: 835 feet

Overall height: 400 feet

Gross tons: 63,190

Set drilling depth record of 29,100 feet in the Gulf of Mexico, December 2000

Since April 2002, drilling completion wells for oil giant BP in Thunder Horse Field, in the Gulf of Mexico

Parent company, Transocean, is the largest off-shore driller in the world, with 88 rigs and 12,000-plus employees worldwide.

Source: Transocean. Company information: www.deepwater.com