To seal the well, “Halliburton generated the nitrogen foam cement by injecting high pressure nitrogen into a base cement slurry as it pumped that slurry into the well,” wrote Fred H. Bartlit Jr., ...

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 ...

Investigators say Halliburton may share some of the blame for the deadly blowout of BP's oil well in the Gulf of Mexico last April. Halliburton mixed the cement used in BP's well. Investigators say ...

Cement slurry used in the Macondo well was unstable and may have contributed to the April 20 blowout aboard the Deepwater Horizon, according to a report issued Thursday by Fred Bartlit Jr., lead ...

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 ...