Abstract: Nu MH-1 well is a long radius horizontal well which is completed by dagang oilfield.This well belongs to National Tackle Key Scientific Research Projects-Horizontal Drilling Technology Research of dagang low permeable block structure sandstone oil and gas reservoir.The target measurement depth is 3622.68 meters,total vertical depth is 3110.74 meters,horizontal displacement is 751.90 meters and horizontal section length is 273.28 meters.This paper introduced the drilling technology of this well,major problems in operating and the technique actions.