Derricks at Yuganskneftegaz oil processing facility at Mamontovskoye oilfield outside the Siberian town of Nefteyugansk. Derricks stand at Yuganskneftegaz oil processing facility, the core unit of oil company YUKOS at Mamontovskoye oilfield outside the Siberian town of Nefteyugansk, December 18, 2004. Russia looks ready to sell the key production unit of beleaguered oil group YUKOS on Sunday and put it back in state hands after almost a decade under private management. REUTERS/Sergei Karpukhin