U.S. energy fields beckoning deals By: MarketWatch July 12, 2012 at 16:45 PM EDT Summer mergers and joint ventures kick off with Unit Corp., Anadarko, Linn Energy and others to develop shale and deepwater fields. Read More >> Related Stocks: Anadarko Petroleum BP Plc ADR Chesapeake Energy Energy Select Sector SPDR Macy's NiSource Noble Energy Unit Corp