适应于软到中硬非研磨性地层。
适应软到中等非研磨性地层。
钻头在钻进超研磨性地层时，胎体的磨损非常严重。
The wear of the matrix of a bit is severe when drilling through super abrasion strata.
新型切削齿及高密度保径布齿提高钻头在硬研磨性地层中的使用寿命。
New type PDC cutters and heavyset gage design promote longer bit life in hard and abrasive formations.
新型切削齿及高密度保径布齿提高钻头在硬研磨性地层中的使用寿命。
New type PDC cutters and heavyset gage design promote longer bit life in hard and abrasive formations.
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