Oil futures rose on Friday to notch a gain of 0.8% for the week, with optimism surrounding a potential phase one of a U.S.-China trade deal offering support for prices, even as some signs point to a more ample supply outlook. Weekly data from Baker Hughes BKR, +3.58%, meanwhile, revealed a fourth straight decline in the number of active U.S. oil drilling rigs, implying a slowdown in production activity. December West Texas Intermediate oil CLZ19, +1.76% rose 95 cents, or 1.7%, to settle at $57.72 a barrel on the New York Mercantile Exchange.