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:      根据现场使用情况具体调整

保径长度 Gauge Length:                    3＂

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):                     28～38

 特性及应用 Features and Application                        

1、中等抛物线四刀翼冠形和中密度布齿适合钻进极软到中软地层；

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

2、斜保径增强了钻头的稳定性，有利于防斜打直。

Inclined gauge protection design increases the stability of drill bit , prevent the inclined drilling and increase the ability of straight drilling.