In bet on oil prices, WPX plans to add Bakken rigs

WILLISTON, N.D., June 25 (Reuters) - Drilling rigs are coming back to North Dakota. WPX Energy Inc, a small oil producer in the No. 2 U.S. crude state, said on Thursday it will add two rigs this year, becoming the first since the crude price downturn to announce concrete steps to boost output.