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Piper Alpha - Wikipedia
Performance Production - Occidental Petroleum
Operations - Occidental Petroleum
Horn Mountain Field, Gulf of Mexico - Offshore Technology
July 6, 1988: The Piper Alpha Disaster - The Maritime Executive
Oil Report: Occidental helps Axis test fully electric service rig
30th anniversary of the world's deadliest offshore oil disaster
Occidental Brings Drilling Rig Back to Colorado After Oil Well ...
The Changing Face Of Big Oil - Forbes