British oil spill was huge explosion occurred in the history. The incident can not be forgotten. It occurred due to sequence of downsizing decisions made by British petroleum plus its partners. There are number of reasons of failure of British oil spill. like defective cement, failure of management, failing to spot leakage, inappropriate interpretation of pressure test, inadequate battery backup system, failure of gas alarm, valve 1 and valve 2, communication gaps and Overwhelmed mud and gas separator.
