FILE - In this April 15, 2009, file photo, an unidentified worker passes a truck owned by Halliburton at a remote site for natural-gas producer Williams in Rulison, Colo. Halliburton is buying rival oilfield services company Baker Hughes in a cash-and-stock deal worth $34.6 billion. The deal comes shortly after talks had stalled and Halliburton prepared to go hostile with its takeover bid. (AP Photo/David Zalubowski, File)