CALGARY, Alberta—Canada’s federal energy regulator on Wednesday approved an application by ConocoPhillips to begin exploratory drilling for oil in the Northwest Territories, the first such permission granted for hydraulic fracturing of horizontally drilled wells in the Canadian Arctic north. The National Energy Board authorized the company to drill two exploratory wells near the town of Norman Wells, which is 684 kilometers (425 miles) northwest of the provincial capitol of Yellowknife. ConocoPhillips […]