Weatherford Internat’l

Weatherford, an oil field-services company, said ongoing tax accounting problems will force it to restate earnings again. Weatherford, which moved to Geneva in 2009 for a more favorable tax rate, posted preliminary earnings as a final tax bill is determined. It estimated 2011 taxes of $490 million to $520 million, and expects up to $250 million in net adjustments to results from at least 2008 as it corrects errors.