发明名称 |
DRILL BIT HAVING DIAMOND IMPREGNATED INSERTS PRIMARY CUTTING STRUCTURE |
摘要 |
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°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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申请公布号 |
CA2693265(A1) |
申请公布日期 |
2000.12.30 |
申请号 |
CA20002693265 |
申请日期 |
2000.06.08 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
TRAUX, DAVID K.;OLDHAM, THOMAS WALTER;VAN WAES, DUANE R.;PENUEL, CARL EDWARD |
分类号 |
E21B10/567;B22F7/06;B23P15/28;E21B10/42;E21B10/43;E21B10/46 |
主分类号 |
E21B10/567 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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