PETROVIETNAM DRILLING & WELL SERVICE CORPORATION revenue for the last year amounted to 5.81 T VND, the most of which — 4.07 T VND — came from its highest performing source at the moment, Drilling Service, the year earlier bringing 3.54 T VND. The greatest contribution to the revenue figure was made by Vietnam — last year it brought PETROVIETNAM DRILLING & WELL SERVICE CORPORATION 2.90 T VND, and the year before that — 3.61 T VND.