Size:17-1/2"          

钻头规范 Bit Specification                                           

切削齿规格 Cutter Size:                     Φ19mm

喷嘴数量/类型 Nozzle Qty/Type:      W18x7

保径长度 Gauge Length:                    3＂

连接形式 Connection Type:               7-5/8＂API Reg

 推荐钻井参数 Recommendations                               

转速 Rotary Speed(rpm):            60～260

钻压 Weight on Bit(kn):              20～80

排量 Flow rate(lps):                     22～40

 特性及应用 Features and Application                        

1、中等抛物五翼冠形和中等密度布齿适合钻进中软到中硬地层；

  The shape of medium parabolic curve and five-blade crown and the medium density cutter is suitable for the mid-soft and mid-hard formation.

2、适合较硬地层钻进的水力排削槽设计使冷却和排削充分,有效地减少了钻头泥包的可能。

  The design of hydraulic scrape discharge tank realize full cooling and scrape discharge, effectively reducing the possibility of mud drum.