Energy firms in Canada almost doubled the number of rigs drilling for oil this week to the highest level in 10 months as producers returned en masse from Christmas breaks and crude prices remain around three-year highs. Drillers added 87 oil rigs during the week ended Jan. 12 bringing the total count up to 185, the highest level since March 2017, General Electric Co’s Baker Hughes energy services firm said in its closely followed report on Friday. That was the biggest weekly increase since drillers added 89 rigs during the same week in 2017. Energy firms in both the United States and Canada have mostly increased the number of rigs operating since the summer of 2016 as U.S. crude prices climbed over the key $50 a barrel level that analysts said would prompt drillers to return to the well pad. [RIG/U] U.S. crude futures traded around $64 […]