WASHINGTON - Halliburton officials knew weeks before the fatal explosion of the BP well in the Gulf of Mexico that the cement mixture they planned to use to seal the bottom of the well was unstable ...

Reporting from Atlanta and Washington — Weeks before the Deepwater Horizon explosion, oil company BP and subcontractor Halliburton were aware of test results showing that the cement mixture designed ...

Hours after a presidential commission raised new questions about the safety of the cement mixture intended to temporarily seal BP's Macondo exploration well, oil field service giant Halliburton said ...

Halliburton cement used to seal BP's Gulf oil well was unstable, but used anyway despite multiple failed tests leading up to the Deepwater Horizon disaster, the presidential oil spill commission has ...

WASHINGTON -- Tests performed before the deadly blowout of BP's oil well in the Gulf of Mexico should have raised doubts about the cement used to seal the well, but the company and its cementing ...

[Update 10/29/10: Halliburton has responded to the commission’s report—and unsurprisingly, the company deflects the blame and places the responsibility back on BP’s shoulders. Halliburton questioned ...

Laboratory tests of cement and additives closely resembling what BP PLC used in its Macondo well in the Gulf of Mexico strongly suggest that the mixture was unstable, the chief counsel for US ...

Weeks before the April 20 Deepwater Horizon explosion, oil company BP and subcontractor Halliburton were aware of test results showing that the cement mixture designed to temporarily seal the well was ...