| http://www.w3.org/ns/prov#value | - But Probert noted that while Halliburton, which BP hired for cementing and other services, had completed cementing of the well???s ninth and final production string some 20 hr before the blowout, the final cement plug was not set because Transocean, the drilling contractor, displaced drilling fluid inside the rise with lighter sealer prior to the planned placement of the final cement plug, which c
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