地层分类
|
岩层名称
|
研磨性
|
钻头胎体系列
|
HRC55
|
HRC
45-50
|
HRC
40-45
|
HRC
35-40
|
HRC
30-35
|
HRC
25-30
|
HRC
20-25
|
HRC
15-20
|
HRC
10-15
|
HRC
5-10
|
HRC
0-0-5
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
软
|
泥岩、页岩、很软的砂岩、泥炭岩、泥质岩、火山岩、凝灰岩等。
|
强
|
●
|
●
|
●
|
●
|
|
|
|
|
|
|
|
中
|
|
●
|
●
|
●
|
●
|
|
|
|
|
|
|
弱
|
|
|
●
|
●
|
●
|
●
|
|
|
|
|
|
中硬
|
石灰岩、流纹岩、安山岩、大理岩、 硬砂岩、褐铁矿、白云母、片岩等。
|
强
|
●
|
●
|
●
|
●
|
●
|
●
|
|
|
|
|
|
中
|
|
|
|
●
|
●
|
●
|
●
|
|
|
|
|
弱
|
|
|
|
|
●
|
●
|
●
|
●
|
|
|
|
硬
|
玄武岩、片麻岩、花岗闪长岩、角岩、伟晶岩、辉绿岩。
|
强
|
|
|
|
|
●
|
●
|
●
|
●
|
●
|
|
|
中
|
|
|
|
|
|
●
|
●
|
●
|
●
|
|
|
弱
|
|
|
|
|
|
|
●
|
●
|
●
|
●
|
|
坚硬
|
坚硬花岗岩、英砾岩、石英岩、硬板岩、流纹岩等。
|
强
|
●
|
●
|
●
|
|
|
|
●
|
●
|
●
|
●
|
|
中
|
|
|
|
●
|
●
|
|
|
●
|
●
|
●
|
●
|
弱
|
|
|
|
|
|
|
|
|
●
|
●
|
●
|
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