Diamondback Energy is on track to announce a major acquisition in the Permian this week, boosting its presence there with the takeover of Double Eagle, which could be worth $5 billion. The Wall Street Journal first reported the news of the deal, followed by Bloomberg, which cited sources in the know as saying the announcement for the deal could come as early as Tuesday. For Diamondback, this would be the second major deal in a row, after it took over Endeavor Energy Resources last year in a deal with a price tag of $28 billion. That has not benefited…