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Unformatted text preview: Transocean’s well control training and MMS requirements to address situations, such as negative tests and displacement operations, was a possible contributing cause of the well control failure. D.
Response Failure Contributing Causes The rig crew’s decision to use the mud gas separator instead of the diverter accelerated the likelihood that the gas on the rig would ignite. The decision to use the mud gas separator during the well control event was a contributing cause of the response failure. Once members of the drill crew identified the increase in drill pipe pressure, they checked the well for flow. At approximately 9:42 p.m., the crew detected flow and diverted the gas to the mud gas separator. The rig crew was not able to determine the magnitude of the flow when it made the decision to go 112 to the mud gas separator. Transocean’s well control manual did not clearly state to go to the diverter if the flow event is unknown. The ambiguity within the Transocean well control manual on when to use the d...
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