U.S. energy companies this week added oil rigs for a second week in a row as crude prices traded near their highest levels since the summer of 2015 as major oil producing countries extended a global deal to limit supply. Drillers added two oil rigs in the week to Dec. 1, bringing the total count up to 749, the highest since September, General Electric Co’s Baker Hughes energy services firm said in its closely followed report on Friday. U.S. producers applauded Thursday’s decision by the Organization of the Petroleum Exporting Countries and non-OPEC producers led by Russia to extend oil output cuts of about 1.8 million barrels per day beyond March until the end of 2018 as they try to finish clearing a global glut of crude. Sponsored Rising U.S. production, however, has been a thorn in OPEC’s side, undermining the impact of its output curbs. U.S. […]