发明名称 |
Rolling cutter drill bit. |
摘要 |
<p>This invention discloses a rolling cone drilling bit [10] having a plurality of cutters [16] which have inserted therein hard metal cutting elements [22] preferably formed of tungsten carbide alloy; and in which bit the rolling cone cutters [16] are located in such a manner that their rotational axes [32] are greatly offset from the rotational axis [34] of the drill bit.</p> |
申请公布号 |
EP0038125(A2) |
申请公布日期 |
1981.10.21 |
申请号 |
EP19810301218 |
申请日期 |
1981.03.23 |
申请人 |
REED ROCK BIT COMPANY |
发明人 |
SCHUMACHER, PERCY WILLIAM |
分类号 |
E21B10/16;E21B10/52;(IPC1-7):21B10/08;21B10/16;21B10/52 |
主分类号 |
E21B10/16 |
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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