The world's biggest producer of oil is now China's PetroChina, not Exxon. PetroChina wasn't even around 13 years ago.
Shell is one of the world’s largest independent oil and gas companies in terms of market capitalisation, operating cash flow...
Yuma Energy, Inc. is a U.S.-based oil and gas company focused on the exploration for, and development of, conventional and...
PetroChina Co., Ltd.
No. 9 Dongzhimen North Street Dongcheng District
Beijing , BE 100007
SIC Code: 1311