<Li> May 14--BP inserts 4 - inch (100 mm) wide riser into the 21 - inch - wide burst pipe . It is initially dislodged when an underwater robot collides with the pipe . </Li> <Li> May 15--Coast Guard and EPA authorize use dispersants underwater, at the source of the Deepwater Horizon leak . </Li> <Li> May 16--GSF Development Driller II starts drilling second relief well . </Li> <Li> May 17--BP begins burning off gas with the Discoverer Enterprise . BP says it will release a live feed of the leak hours after receiving a request from Congressman Edward Markey . Supporting his position is Steve Wereley from Purdue University who says the leak may be 70,000 barrels (2,900,000 US gallons; 11,000,000 litres) a day . </Li>

Timeline of the deep water horizon oil spill