Rank;Global Rank;Institution;Country;Sector
1;24;China National Petroleum Corp *;CHN;Companies
2;31;PetroChina Co Ltd;CHN;Companies
3;34;China Petroleum and Chemical Corporation *;CHN;Companies
4;115;China National Offshore Oil Corp *;CHN;Companies
5;209;Schlumberger *;MUL;Companies
6;308;SINTEF Group;NOR;Companies
7;351;Shell *;MUL;Companies
8;358;Petrobras *;MUL;Companies
8;358;Petrobras Brasil;BRA;Companies
10;400;Total, France;FRA;Companies
10;400;TOTAL *;MUL;Companies
12;418;GNS Science;NZL;Companies