APPLICATION OF AB1605 TYPE PDC BIT IN JS17 WELL GROUP

In order to improve the penetration rate of Luodai structural gas field in Sichuan west, we have analyzed the application conditions of PDC bits used in the secondary hole of the structure. According to the formation characteristics and combining with the field equipments appearance, we have developed the AB1605 type steel matrix PDC bit by cooperating with the manufacturer of the PDC bit. The PDC bit has been applied in JS17 well, the result indicates that it fits the lithologic variation of the formation, and drill through gravel formation. The penetration rate increases significantly. During the drilling process, the make-up of string optimum can decrease the rounds of trip and shorten further the drilling cycle. In JS17 well group, the actual drilling cycle is 33.75%~42.14% shorter than the design drilling cycle. The shortest drilling cycle record in the same construct, same kind rig, similar well section and adjacent blocks was achieved.