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    • 9. 发明申请
    • ANTI-TRACKING FEATURE FOR ROCK BITS
    • 抗震跟踪功能
    • WO2009131969A3
    • 2010-01-14
    • PCT/US2009041193
    • 2009-04-21
    • BAKER HUGHES INCBUSKE ROBERT JOVERSTREET JAMES LPESSIER RUDOLF CARL
    • BUSKE ROBERT JOVERSTREET JAMES LPESSIER RUDOLF CARL
    • E21B10/16E21B10/43
    • E21B10/16
    • The harmful effects of tracking are reduced for a drill bit having roller cones (29) with at least one of the outermost rows (51) of active teeth (35) containing one or more teeth (35) having a height (65) that does not extend to the height (67) of at least one of the outermost rows on another roller cone on the bit. The crest (63) on this tooth (35) may have a length (58) in a circumferential direction that is wider than an overall width (69) of the tooth (35) in the outer to inner direction. The invention may be used on any cutter row, not just the outermost row (51). 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 (201) of the tooth (201) on one or more roller cones.
    • 对于具有辊锥(29)的钻头而言,减少对跟踪的有害影响,其中活动齿(35)的至少一个最外行(51)包含一个或多个具有高度(65)的齿(35) 不延伸到钻头上另一个圆锥体上的最外面的行中的至少一个的高度(67)。 该齿(35)上的波峰(63)的圆周方向上的长度(58)可比齿(35)在外侧向内侧的整体宽度(69)宽。 本发明可以用于任何切割器行,而不仅仅是最外面的行(51)。 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(201)的前缘和后缘(201)之间。