公开(公告)号：US20060260846A1

公开(公告)日：2006-11-23

申请号：US11383584

申请日：2006-05-16

申请人： Gary Portwood ,  Peter Wilson ,  Luca Tedeschi ,  Bryce Baker ,  Daniel Brietzke

发明人： Gary Portwood ,  Peter Wilson ,  Luca Tedeschi ,  Bryce Baker ,  Daniel Brietzke

IPC分类号： E21B10/36

CPC分类号： E21B10/16 ,  E21B10/52

摘要： A rolling cone drill bit comprises a plurality of bottomhole cutter elements positioned in a first circumferential row, wherein at least one of the cutter elements comprises a cutting portion extending from a base portion to a point furthermost from the base portion, defining an extension height. The ratio of the cross-sectional area of the cutter element at a point equal to ninety-four percent of the extension height to the cross-sectional area of the cutter element base is greater than 0.2. Moreover, the ratio of the extension height to the base diameter is not greater than 0.75.

摘要翻译： 滚动锥钻头包括定位在第一周向排中的多个井底切割元件，其中至少一个切割元件包括从基部延伸到距离基部最远的点的切割部分，限定延伸高度。 切割元件的截面积等于延伸高度的94％与切割元件基底的横截面面积的比率大于0.2。 此外，延伸高度与基础直径的比率不大于0.75。