Oilfield services provider Baker Hughes Inc, which is being acquired by General Electric Co, said crude oil prices would need to rise by roughly another 15 percent to spur producers to spend more on drilling outside North America. Oil prices in the mid- to upper-$50s-per-barrel range would encourage North American producers, while prices above $65 per barrel would coax international producers to boost spending, Chief Executive Martin Craighead said. U.S. crude oil futures were at nearly $54 per barrel at 1800 GMT on Thursday, while Brent prices were at $56.32. While producers have put more rigs back to work in low-cost North American shale fields, such as the Permian Basin in Texas, due to higher oil prices, they have been reluctant to bet bigger on the expensive deepwater […]