Revenue from North American operations alone dropped 4 percent in the third quarter as the oil business environment declined further, Schlumberger said. “For oilfield services, the market outlook for the coming quarters looks increasingly challenging with activity expected to be reduced further,” Schlumberger Chief Executive Officer Paal Kibsgaard said in a statement. Schlumberger said third quarter revenue fell 4 percent for North American operations and 7 percent internationally. Year-on-year, revenue for North American operations alone dropped 34 percent. In a September report, the U.S. Energy Information Administration said total upstream investments could stay below the 10-year average if crude oil prices remain depressed. West Texas Intermediate, the U.S. benchmark for crude oil prices, closed trading Thursday about 0.3 percent below the start of October despite a rally last […]