Oil prices were little changed on Friday as U.S. Gulf of Mexico crude output dropped by more than half from disruptions caused by a tropical storm, but concerns over a global crude surplus in the months ahead limited gains.  Brent crude LCOc1 futures settled at $66.72 a barrel, climbing 20 cents. U.S. West Texas Intermediate (WTI) crude CLc1 futures settled at $60.21 a barrel, up 1 cent. Brent has gained 4% this week while WTI posted a 4.7% rise. Both benchmarks fell last week. Tropical Storm Barry, which is expected to become a hurricane just before making landfall this weekend, boosted crude futures as oil companies in the Gulf of Mexico sliced production. Nearly 59%, or 1.1 million barrels per day, of crude oil production […]