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Source: Campetrol, Hydrocarbons Colombia
This graph shows the latest data published by the Colombian Petroleum Services Association (Campetrol) from 2011 which is the last full year for which data is available from the Colombian company regulator SuperSociedades. These companies are registered in standard industry code (CIIU) C1120 which is defined as “SERVICE ACTIVITIES. RELATING TO OIL AND GAS EXTRACTION, EXCLUDING SURVEYING” Twenty-five firms or 16% of the companies studied comprise 80% of industry revenues. The Top 5 include industry heavyweights like Schlumberger, Haliburton, Weatherford and Baker Hughes. But there is a very long tail of 134 companies with average 2011 revenue of US$7.8M. (Twenty-eight firms have no data and so were excluded.) The bottom 50% of firms (80 companies) have average revenues of US$1M.

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