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July 17 (Reuters) - ConocoPhillips COP.N said on Friday it had agreed to acquire a 42% stake in BP Energy Company of Kirkuk Limited from BP BP.L, supporting the redevelopment of four producing oilfields in northern Iraq's Kirkuk area.

The agreement is expected to be signed during Iraqi Prime Minister Ali al-Zaidi's official visit to Washington, the company said.

The contract includes initial gross recoverable resources of more than 3 billion barrels of oil equivalent, to be developed through field rehabilitation, redevelopment and optimization work, with additional exploration potential.

Zaidi is aiming to secure major U.S. investment in his country's oil, gas, and power sectors during a visit to the White House this week, after the Iran war dwindled crude output and state finances.