发明授权
- 专利标题： Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
- 专利标题（中）： 在钻井操作期间监测和记录井下钻头的操作状态的方法和装置
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申请号： US09702921申请日： 2000-10-27
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公开(公告)号： US06571886B1公开(公告)日： 2003-06-03
- 发明人: Eric Charles Sullivan , Theodore Edward Zaleski, Jr. , Scott Ray Schmidt , Don Quy Nguyen , Glenn R. Zadrapa , Timothy K. Marvel , Daniel E. Ruff
- 申请人： Eric Charles Sullivan , Theodore Edward Zaleski, Jr. , Scott Ray Schmidt , Don Quy Nguyen , Glenn R. Zadrapa , Timothy K. Marvel , Daniel E. Ruff
- 主分类号： E21B1022
- IPC分类号： E21B1022
摘要：
An improved drill bit includes a bit body, a coupling member formed at an upper shank portion. It further includes at least one sensor for monitoring at least one condition of the bit during drilling operations. In one embodiment the at least one sensor is a capacitor disposed in a lubrication pathway. An electronics bay is defined in-part by the upper shank portion. It houses at least one monitoring circuit. A battery cavity is disposed in at least one of the bit legs. A battery cavity cap is provided. A seal is provided to seal the battery cavity cap at the bit leg to define a fluid tight battery cavity.
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