Discoverer Spirit Sets Deep Drilling Records

Transocean's 5th Generation drillship Discoverer Spirit Team recently set new records that include the deepest well drilled in the U.S. Gulf of Mexico at 34,189 feet MD (measured depth) for Chevron (Unocal). The 34,189 feet was also a record for the deepest real-time LWD/MWD (logging while drilling/measuring while drilling). Both were achieved on the client's Knotty Head well. Other partners in the Knotty Head joint venture include Anadarko Petroleum Company, BHP Billiton, and Nexen Petroleum USA, Inc., with each having a 25% interest in the prospect.

In addition, the team set a record for the longest 14-3/4 inch bit run at 11,545 feet and a total depth of 24,085 feet.

In setting the records, Discoverer Spirit crews tripped more than 4 million feet, or almost 775 miles, of drillpipe.

Launched in 2000 as the second Enterprise-class drillship that features Transocean's patented dual-activity process, the Discoverer Spirit has set past records right from the start. The team set a water-depth drilling world record at 9,727 feet of water in 2001 and completed the world's deepest subsea well in 7,209 feet of water, both in the U.S. Gulf of Mexico.

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