text: Chevron denies Kazakh tax claim ChevronTexaco says its Tengizchevroil venture has not been sent a \$2.5bn back-tax bill from the Kazakh government.
inputs: Chevron denies Kazakh tax claim ChevronTexaco says its Tengizchevroil venture has not been sent a \$2.5bn back-tax bill from the Kazakh government.