| 摘要 |
<p>A rolling cutter drill bit has multiple rows of gage reaming inserts (30, 32) mounted in the gage face of the cutters (18, 20, 22). A first interlocking row of gage reaming inserts (30) is positioned on the gage face of a cutter in close proximity to the gage row (26), such that the reaming inserts are closely adjacent to the mouth of the gage insert sockets. A second non-interlocking row of gage reaming inserts (32) is positioned on the gage face of the cutter such that the reaming insert sockets are a predetermined minimum distance from the gage insert sockets and first reaming row sockets, thereby enabling a maximum number of large diameter reaming inserts to be placed in the second reaming row. Both the first and second reaming row inserts (30, 32) are sized and placed to maintain a desired distance between all insert sockets without affecting the size and spacing of gage row inserts (26). <IMAGE></p> |
