序号 | Organization | Patents |
1 | Schlumberger Limited | 54 |
2 | Halliburton Company | 34 |
3 | China Petrochemical Corporation (Sinopec Group) | 25 |
4 | China National Petroleum Corporation | 24 |
5 | General Electric Company | 20 |
6 | National-Oilwell Varco, Inc. | 15 |
7 | Boart Longyear International Holdings Inc. | 14 |
8 | Exxon Mobil Corporation | 10 |
9 | China University Of Petroleum | 9 |
10 | 其他 | 222 |