Minyak bumi Occidental Petroleum Bataafsche Petroleum Maatschappij Marathon Petroleum Kondur Petroleum S.A. China National Petroleum Corporation Woodside Petroleum Anadarko Petroleum Corporation Bharat Petroleum Petroleum Helicopters International Institut Teknologi Petroleum Balongan Sinopec QatarEnergy Pan American Petroleum and Transport Company Organisasi Negara-Negara Pengekspor Minyak Bumi Gas minyak cair BP (perusahaan) CPC Corporation