The number of rigs engaged in exploration and production in North Dakota, the No. 2 oil producer in the nation, is on a steady decline, state data show. Data from the North Dakota Industrial Commission show 67 rigs employed across the state, down about 3 percent from last week and 65 percent less than this date in 2014. The 196 rigs engaged in exploration and production activity on Sept. 21, 2014, was the highest in three years . Oil field services company Baker Hughes reported last week the number of rigs deployed across the United States fell 1.2 percent to 644 for the third-straight week of declines. Low crude oil prices mean energy companies have less capital to invest […]