The Ocean Guardian semi-submersible drilling rig floats tethered to the sea floor just three days after beginning its contracted well for Rockhopper Exploration a little more than 100 km (62 miles) offshore from the Falkland Islands, in this April 19, 2010 file photo. A potential oil find near the remote Falkland Islands has the British territory's residents hopeful of an economic boom but anxious to preserve their quiet ways and avoid conflict with Argentina, which claims the islands as its own. Photo taken April 19, 2010. REUTERS/Gary Clement/Files (FALKLAND ISLANDS - Tags: ENERGY POLITICS ENVIRONMENT BUSINESS)