| 申请日期 | 2026-01-14 | 申请号 | CA2311020 |
| 公开（公告）号 | CA2311020C | 公开（公告）日 | 2007-11-06 |
| 公开国别 | CA | 申请人省市代码 | 全国 |
| 申请人 | SMITH INTERNATIONAL | ||
| 简介 | An earth-boring bit comprises a bit body bit body in which are mounted a plurality of cutting structures inserts, wherein at least a portion of the cutting structures comprise diamond--impregnated inserts having a total thermal exposure of less than 25 minutes above 1500.degree.F. The diamonds can be natural or synthetic diamond. The bit body itself may be diamond-impregnated, in which case it is preferred that the diamonds in the inserts make up at least 40% of the total diamond in the bit. | ||
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