发明名称 |
Rock bit cone retention system |
摘要 |
A roller cone drill bit includes a bit body adapted to be rotated about a longitudinal axis. At least one leg depends from the bit body, and a journal is cantilevered from the leg. A roller cone is rotatably mounted on the journal. A cone retention member is disposed between a first slot in the journal and a corresponding second slot in the roller cone. An access hole runs through the journal to the first slot, penetrating the first slot at a location away from the top dead center of the first slot.
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申请公布号 |
US6170582(B1) |
申请公布日期 |
2001.01.09 |
申请号 |
US19990346642 |
申请日期 |
1999.07.01 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
SINGH AMARDEEP;PETERSON STEVE;HUANG SUJIAN J. |
分类号 |
E21B10/20;E21B10/22;(IPC1-7):E21B10/20 |
主分类号 |
E21B10/20 |
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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