The conclusion of the saga removes a stock overhang for Chevron and paves the way for the $53 billion deal to close immediately, which the oil giant said it could happen within a couple of days.

Chevron Corp. has prevailed in a 20-month fight to buy Hess Corp. for $53 billion, overcoming a challenge by arch rival Exxon Mobil Corp. that was unprecedented in the modern history of Big Oil.

Chevron Corporation has completed its $53-billion acquisition of Hess Corporation, securing Hess's 30% stake in Guyana's Stabroek offshore oil field after winning an arbitration case against Exxon.