Why troublemakers are good for oil majors

    By Liam Denning     The oil patch is alive with activists. But even Gordon Gekko might blanch at going up against the Kremlin—more's the pity.     As management at the likes of Hess HES +1.09% and Occidental Petroleum     OXY +3.03% have wrestled with shareholders, they can only look enviously at     national oil companies. The...