| 发明名称 |
DRILL TOOL |
| 摘要 |
A rotary bit for oil and gas well drilling has cutting elements (1) set in a hard facing material (3) which in turn is supported by a sintered steel section (4) between the hard facing and the steel base (7) of the bit. <IMAGE> |
| 申请公布号 |
AU7355081(A) |
申请公布日期 |
1982.02.11 |
| 申请号 |
AU19810073550 |
申请日期 |
1981.07.29 |
| 申请人 |
CHRISTENSEN, INC. |
发明人 |
DR. I.R. JURGENS;H. RATHKAMP |
| 分类号 |
B22F7/08;E21B10/46;E21B10/56;E21B10/567;E21B10/60 |
主分类号 |
B22F7/08 |
| 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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