发明名称 |
Drill bit reservoir with controllable relief pressure |
摘要 |
A rotary rock bit includes a lubricant reservoir with a pressure compensation assembly disposed therein. The pressure compensation assembly is adapted to permit selective adjustment of the relief pressure set by the assembly through the selective adjustment of one member in the assembly with respect to another member in the assembly.
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申请公布号 |
US7665547(B2) |
申请公布日期 |
2010.02.23 |
申请号 |
US20060601029 |
申请日期 |
2006.11.17 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
YONG ZHOU;WITMAN, IV GEORGE B.;TORRES CARLOS |
分类号 |
E21B10/24 |
主分类号 |
E21B10/24 |
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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