Sorry this hurts your nationalist pride but BP owes this problem since the construction done here was done to BP's construction specifications.
Says who? The deepwater horizon rig isn’t the only Transocean owned rig which has had a poor safety regime. 4 people on 4 different rigs were killed in accidents in 2009 and was issued with an improvement notice by the UK HSE for the substandard state of its blowout preventer back in 2006, four years before this disaster. They are responsible for the problem which directly led to the incident.
As for Halliburton, they were responsible for fixing the pipes in place. Doing a poor job of that is said to be a more important factor in causing blowouts than malfunctioning equipment, and they are accused of causing a major blowout in a rig off the coast of Australia last year due to sloppy work.
Sounds like there is a lot of buck passing going on here by two companies with demonstrably dodgy safety records. How convenient that the company at the top of the food chain in this instance happens to be a company that isn’t American and can be safely attacked without domestic consequence...