Reuters | Oil prices dip after US crude hits near two-year high on pipeline shutdown Reuters SINGAPORE (Reuters) - Oil prices eased on Thursday, with U.S. crude dipping away from two-year highs reached the day before, but the shutdown of the Keystone pipeline and a drawdown in fuel inventories continued to bolster markets despite worries over ... Keystone pipeline spill sends oil prices higher South Dakota Warns It Could Revoke Keystone Pipeline Permit Over Oil Spill Oil prices hit 2½-year high on Keystone pipeline shutdown |