U.S. oil services company Halliburton said on Tuesday it expects to cut potentially more than 6,000 jobs across the globe because of a “challenging market environment” resulting from low oil prices. Halliburton, the latest in a growing list of major oil industry companies laying off workers because of a worldwide glut of crude, said it expects to let go 6.5 percent to 8 percent of its 80,000-strong workforce, amounting to between 5,200 and 6,400 jobs. The number includes the 1,000 jobs that had been cut in the eastern hemisphere in the fourth quarter of 2014, a company spokeswoman said. Halliburton said the impact of the layoffs would be across all company operations, but it did not offer specifics. Oil prices have dropped about half to $50 a barrel since June because of the global glut of oil, forcing many companies to reduce spending. […]