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    • 9. 发明申请
    • Anti-Tracking Feature for Rock Bits
    • 岩石钻头的抗追踪功能
    • US20110315454A1
    • 2011-12-29
    • US13227186
    • 2011-09-07
    • Robert J. BuskeJames L. OverstreetRudolf Carl Pessier
    • Robert J. BuskeJames L. OverstreetRudolf Carl Pessier
    • E21B10/16
    • E21B10/16
    • The harmful effects of tracking are reduced for a drill bit having roller cones with at least one of the outermost rows of active teeth containing one or more teeth having a height that does not extend to the height of at least one of the outermost rows on another roller cone on the bit. The crest on this tooth may have a length in a circumferential direction that is wider than an overall width of the tooth in the outer to inner direction. The invention may be used on any cutter row, not just the outermost row. The design may be used on a different roller cone or row, or more than one cutter row. The anti-tracking feature may be located between the leading and trailing edges of the tooth on one or more roller cones.
    • 对于具有滚子锥体的钻头而言,减少了跟踪的有害影响,其中至少一个最外面的活动齿的行包含一个或多个齿,其高度不延伸到另一个的最外面行中的至少一个的高度 辊锥在位上。 该齿上的波峰可以具有在圆周方向上的长度,该长度比外齿向内方向上的齿的总宽度宽。 本发明可以用于任何切割器行,而不仅仅是最外面的行。 该设计可以用于不同的滚子圆锥体或排或多于一个的切割器排。 抗跟踪特征可以位于一个或多个滚子锥体上的齿的前缘和后缘之间。