Size:8-1/2"          

钻头规范 Bit Specification                                           

切削齿规格 Cutter Size:                      Φ13mm,Φ19mm

喷嘴数量/类型 Nozzle Qty/Type:      Φ13x2+W18x3+W16x2

保径长度 Gauge Length:                    2＂

连接形式 Connection Type:               4-1/2＂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、中等抛物线五刀翼冠形和中等密度布齿适合钻进中硬到硬地层；

The shape of medium parabolic curve and five-blade crown and the medium dense teeth is suitable for the med-hard to    hard formation.

2、短保径设计有利于纠斜和定向井钻井。

Short gauge protection design is beneficial well strainghtening  and directional well drilling.