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Pile foundations big size hole opener

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1,尺寸size

1000- 3000mm

2,切削刀类型 cutter type

81/2寸钻头牙掌,8村滚刀,江汉合金齿81/2 tricone bit cutter , 8 hob cutter , IADC code 517,537,637, kingdream teeth material steel  YG16

3,连接螺纹

Thread connection

Pin*box (IF,REG , NC,FH )

4,应用Application

硬岩石扩孔桥桩地基工程,如硬页岩、石灰岩、砂岩、白云岩Hard rock reaming bridge pile foundation engineering, such as hard shale, limestone, sandstone, dolomite