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The oil spill was caused by a rig fire as a result of a well blow-out. The causes of the blow out are still under investigation. The blow out preventers should have made it impossible for the well to blow out. The action of filling the well with sea water after the cementing was complete (instead of drilling mud) has been questioned.

British Petroleum (BP) is the operator of the lease , so they have primary responsibility. But, if errors were made by the subcontractor, Halliburton, in the cementing operation, then they may be blamed. Finally, the manufacturer of the blow out preventer, Cameron, might share in the cause.

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15y ago

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