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Drilling riser separation. Transocean Inc. announced on May 23 that the drilling riser had separated on its deepwater drillship Discoverer Enterprise, and the rig had temporarily suspended drilling operations for BP on Well MC 822, No. 6 on the BP-operated Thunder Horse field in Mississippi Canyon Block 822, in 6,000-ft water. No injuries occurred and no hydrocarbons were released as a result of the incident. A visual inspection of the wellhead with an ROV showed no wellhead damage. And the company believed that the rig could resume operations “within two to three weeks,” pending completion of repairs and results of an investigation into the cause of the incident.
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