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N.D. (AP) – North Dakota employment experts predict demands for oil field workers will only become more intense in 2017. 

Cindy Sanford at the Job Service North Dakota office in Williston says the largest uptick is for hydraulic fracturing crews, which average between 45 and 65 people per crew.

Sanford says recruiters from two large oil field services companies, Schlumberger and Oil States, stopped by the Job Service office this week.

The Williston Herald says the state’s core oil-producing counties, including Williams, McKenzie, Divide and Mountrail, have about 1,300 job openings across all sectors.