Shares of oilfield firm Halliburton Co  fell sharply on Tuesday after the company forecast lower revenues in key business areas in the first quarter, overshadowing a quarterly profit beat and a pledge to reduce 2019 spending.  Clients in North America, Halliburton’s biggest market by revenue, began pulling back on some drilling services last year amid transportation bottlenecks in the largest U.S. production region and after oil prices slid sharply in the fourth quarter. An oil glut and concerns about a global economic slowdown have pushed U.S. crude futures CLc1 down about 30 percent since October to around $53 a barrel. The company anticipates mid- to high-single-digit revenue declines in its Completion and Production and its Drilling and Evaluation divisions next quarter. Halliburton […]