So it was Halliburton's fault

"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."
- Critical tests NOT done on cement before blowout

Halliburton said “it is premature and irresponsible to speculate on any specific causal issues.”...
...“Halliburton had completed the cementing of the final production casing string in accordance with the well design,” it said. “The cement slurry design was consistent with that utilized in other similar applications. In accordance with accepted industry practice … tests demonstrating the integrity of the production casing string were completed.”
Gulf Oil Spill Halliburton Connection

"Halliburton does not care if a few Gulf shrimpers go out of business. But low cost shrimp pouring out of polluted ponds?...why that is almost like...don't say it...Rigged?...Oil spill?"
- Halliburton Gulf Oil Spill Conspiracy