FILE - In this Friday, July 16, 2010, file photo, drilling rigs and workboats operate at the site of the Deepwater Horizon incident in the Gulf of Mexico. As of December 2013, BP is leading an industry-wide push to develop technology that can retrieve oil from formations that are so deep under the sea floor, and under such high pressure and temperature, that conventional equipment would melt or be crushed by the conditions. (AP Photo/Dave Martin)