With a gain of three, the number of rigs actively exploring for or producing oil and natural gas in North Dakota is up 12 percent from last week, data show. Data from North Dakota’s government show 28 rigs in active service as of Monday, up from the 25 reported one week ago. Rig counts serve as a barometer for the health of the oil and gas industry as oil prices in part determine how much companies are investing in exploration and production. Though at times above the $50 mark in recent sessions, last week saw crude oil prices moving lower after a string of data showed weak conditions persisted in […]