By the end of 2003,Tuha oilfield signed the long term agreement with Jereh regarding maintaining their frac fleets. Jereh will regularly conduct the maintance twice a year for their frac equipments including to check the equipment condition and settle the potential problems. Jereh guarantees that for the temporary problem,Jereh will complete the repairing within 72 hours.

With the careful maintenance of Jereh's service people, the electric system,hydraulic system and mechanic service ability of the fleet have been fully resumed. The problems rate of the full set of frac units is highly decreased and guarantee the normal production.