 The Tulsa Metropolitan Area has been home to more traditional oil companies such as ONEOK, Williams Companies, Helmerich & Payne, Magellan Midstream Partners with significant presence from ConocoPhillips.Oklahoma City is home to energy companies such as Devon Energy, Chesapeake Energy, OGE Energy, SandRidge Energy, Continental Resources.Duncan, Oklahoma is the birthplace of Halliburton Corporation.