| No. | NOMBRE DE LA EMPRESA | No. | NOMBRE DE LA EMPRESA | | 01 | ACIPET | 24 | LA CORTEZ ENERGY | | 02 | ALQUISER | 25 | LUKOIL OVERSEAS | | 03 | ARTIMFER | 26 | MANSAROVAR | | 04 | BAKER HUGHES | 27 | MANSER | | 05 | BAWER | 28 | NOV DOWNHOLE | | 06 | BP EXPLORATION | 29 | OCCIDENTAL DE COLOMBIA | | 07 | COMANSE | 30 | OMEGA ENERGY | | 08 | CORPAC STEEL | 31 | PACIFIC RUBIALES | | 09 | CPNT | 32 | PETROBRAS | | 10 | CSI | 33 | PETROMINERALES | | 11 | DRUMMOND | 34 | PETROTIGUER | | 12 | DYPROTEC | 35 | POINTER ECOPETROL - PERFORACIÓN | | 13 | ECOPETROL | 36 | RANCHO HERMOSO | | 14 | ESPA | 37 | SADEVEN | | 15 | FERRETERIA LA ESPAÑOLA | 38 | SAN ANTONIO INTERNACIONAL | | 16 | GECOLSA | 39 | SCHLUMBERGER CDGP | | 17 | GEOMATRIX | 40 | SCHLUMBERGER SURENCO | | 18 | GRAN TIERRA ENERGY | 41 | SHELL COLOMBIA | | 19 | HALLIBURTON | 42 | TGT GAMAS | | 20 | HARKEN | 43 | TRIENERGY | | 21 | HOCOL | 44 | VETRA EXPLORATION COLOMBIA | | 22 | HUPECOL | 45 | WEATHERFORD | | 23 | INTEROIL | | |
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