On Sept. 2 nd of 2009, well YM7-12 was started to drill together with the complete set of drilling waste management equipment operated, to uninterrupted while drilling processing the waste mud from the solid control system . On Nov. 2 nd of 2009, the second section drilling finished. The complete system operated for a total time of 57 days, accumulative handling drilling waste mud 3450m³, including bentonite polymer mud 250m³, polymer mud 2225m³, polysulfonate drilling fluid -KC1-polysulfonate unsaturated salt water 975m³. After treatment and mud discharging, the water is 620m³, sand (drilling cuttings>5mm) 170m³, non-harmful mud clay 1150m³. Through monitoring and sample test to the mud clay and discharged water, all material during the whole operation reached to discharging standard. On May 5 th of 2010, well Ha 702 was conducted a second time pilot test. This well is a three stage structure. The first drilling section is 419.1mm big wellbore, the seco...