Oil heads for seventh weekly loss as supply glut drags

By Florence Tan SINGAPORE (Reuters) - Oil prices were heading for a seventh weekly loss on Friday, with key producers showing no signs of cutting output in the face of a global supply glut. Brent and U.S. crude futures both hit their lowest since 2009 this week and are down more than 50 percent from June, although they inched up on Friday after robust U.S. economic data brightened the outlook for demand. Brent crude had climbed 21 cents to $51.17 a barrel by 0203 GMT. U.S. crude for February del