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Well and release the rig? bp as a leaseholder and operator of the well hired transocean to drill that well. transocean as owner and operator of the deep water horizon rig, had the responsibility for safety of drilling operations. we don't know yet precisely what happened on the night of april 20th, but what we do know is there were anomalous pressure test readings prior to the explosion. these could have raised concerns about well control prior to the operation to replace mud with sea water in the well in preparation for the sets of the cement plug. >> in his prepared remarks transocean's pres...

Mechanism, fail to shut in the well and release the rig? bp as a leaseholder and operator of the well hired transocean to drill that well. transocean as owner and operator of the deepwater horizon drilling rig, had the responsibility for safety of drilling operations. we don't know yet precisely what happened on the night of april 20th, but what we do know is there were anomalous pressure test readings prior to the explosion. these could have raised concerns about well control prior to the operation to replace mud with seawater in the well in preparation for setting of the cement plug. >> in h...

Preventer fail to shut in the well and release the rig? bp as a leaseholder and operator of the well hired transocean to drill that well. transocean as owner and operator of the deep water horizon rig, had the responsibility for safety of drilling operations. we don't know yet precisely what happened on the night of april 20th, but what we do know is there were anomalous pressure test readings prior to the explosion. these could have raised concerns about well control prior to the operation to replace mud with sea water in the well in preparation for the sets of the cement plug. >> in his prep...

How the oil spill and how it happened. the committee on energy and natural reports will talk to experts and the folks who head up the government agencies. right now, the big spotlight is on the three companies involved in that oil rig. they've been testifying already. bp, halleburton and transocean. they also have to testify this afternoon and those companies are already trying to pass off the blame on each other. the company leaders plan to talk about the cement plug that was supposed to be in place to prevent gases from reaching the surface, but reportedly, the plug wasn't there before worke...