More from BP's Lamar McKay: BP expects its stake in Rosneft to flourish into direct partnerships to tap Russia's oil wealth, and will result in cost synergies and immediate exploration and development benefits since many of TNK-BP's assets are contiguous to Rosneft's fields. The partnership with Rosneft is "a bigger platform" from which to operate vs. TNK-BP, "the start of a new relationship," McKay says. (earlier)