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发明申请
US20070278014A1 Drill bit with plural set and single set blade configuration 审中-公开
钻头具有多组和单组刀片配置

Drill bit with plural set and single set blade configuration
摘要：
Disclosed within is a drill bit with a plural set of blades having redundant cutter elements and single sets of blades having unique cutter element arrangements. The redundant cutter elements have equivalent longitudinal and axial spacing as corresponding cutter elements. The distance from a longitudinal axis of the bit to a redundant cutter element is equivalent to the distance from the longitudinal axis to the corresponding cutter element.
摘要（中）：

公开的是具有多个具有冗余刀片元件的多组叶片的钻头和具有独特刀具元件布置的单组叶片。 冗余刀具元件具有与相应刀片元件相等的纵向和轴向间隔。 从钻头的纵向轴线到冗余切割器元件的距离等于从纵向轴线到相应切割器元件的距离。

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