China Oilfield Services Ltd. revenue for the last year amounted to 6.21 B USD, the most of which — 3.64 B USD — came from its highest performing source at the moment, Oilfield Technical Services, the year earlier bringing 2.92 B USD. The greatest contribution to the revenue figure was made by China — last year it brought China Oilfield Services Ltd. 4.90 B USD, and the year before that — 4.37 B USD.