ExperienciaExperience PLATINO ENERGY PACIFIC RUBIALES ENERGY MANSAROVAR ENERGY COLOMBIA LTD ARGOSY ENERGY INTERNATIONAL OMIMEX DE COLOMBIA LTD ALPHA CONSULTORES LTDA HARKEN DE COLOMBIA LTD ECOPETROL EXPLOTACIONES CMS OIL AND GAS COMPANY EMERALD ENERGY COLOMBIA RAM PETROLEUMS LIMITED KELT COLOMBIA S.A. PLATINO ENERGY PACIFIC RUBIALES ENERGY MANSAROVAR ENERGY COLOMBIA LTD ARGOSY ENERGY INTERNATIONAL OMIMEX DE COLOMBIA LTD ALPHA CONSULTORES LTDA HARKEN DE COLOMBIA LTD ECOPETROL EXPLOTACIONES CMS OIL AND GAS COMPANY EMERALD ENERGY COLOMBIA RAM PETROLEUMS LIMITED KELT COLOMBIA S.A.