Lawyers for the US government, private sector plaintiffs and the states of Alabama and Louisiana also argued that BP contractors Transocean, owner of the rig, and Halliburton, which supplied cement intended to seal the well, acted with gross negligence. 代表美国政府、私营部门原告以及阿拉巴马州和路易斯安娜州的律师也辩称,BP承包商发生爆炸钻井平台的所有者Transocean以及供应水泥封堵油井的Halliburton存在重大疏忽。