NEW ORLEANS — A federal judge is ordering tests to be performed as soon as possible on cement Halliburton Co. used to seal the BP well that later blew out catastrophically in the Gulf of Mexico. U.S.

Halliburton Co. acknowledged that it skipped a critical test on the final formulation of cement used to seal BP’s oil well before it blew out catastrophically in the Gulf of Mexico. The company, which ...

Learn how the slump test measures the consistency of fresh concrete and why it matters for getting the right mix on the job.

Before the massive blowout of BP's Macondo oil well in the Gulf of Mexico, tests showed that the cement Halliburton pumped down into the well could be unstable, according to a presidential commission ...