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公开(公告)号:US08887839B2
公开(公告)日:2014-11-18
申请号:US12817411
申请日:2010-06-17
申请人: Chaitanya K. Vempati , Jack Thomas Oldham , Edwin R Reek , Danielle M. Fuselier , Suresh G. Patel , Robert Laing
发明人: Chaitanya K. Vempati , Jack Thomas Oldham , Edwin R Reek , Danielle M. Fuselier , Suresh G. Patel , Robert Laing
CPC分类号: E21B10/43
摘要: A drill bit for drilling subterranean formations comprising a drill bit body including a group of primary cutting elements comprising a first primary cutting element and a second primary cutting element radially spaced apart from each other along a first radial axis. The drill bit body further including a group of backup cutting elements comprising a first backup cutting element in a secondary cutting position relative to the first primary cutting element and a second backup cutting element in secondary cutting positions relative to the second primary cutting element, wherein the first and second backup cutting elements are radially spaced apart from each other along a second radial axis different than the first radial axis and comprise a difference in cutting characteristic relative to each other of one of a backrake angle and a siderake angle.
摘要翻译: 一种用于钻探地下地层的钻头,包括钻头体,该钻头体包括一组初级切割元件,该组主切割元件包括第一主切割元件和沿着第一径向轴线彼此径向间隔开的第二主切割元件。 所述钻头体还包括一组备用切割元件,所述备用切割元件包括相对于所述第一主切割元件处于次切割位置的第一备用切割元件和相对于所述第二主切割元件的次切割位置的第二备用切割元件,其中, 第一和第二备用切割元件沿着与第一径向轴线不同的第二径向轴线彼此径向间隔开,并且包括相对于彼此之间的反向角和取景角之一的切割特性的差异。