发明名称 |
Apparatus and method for down hole vibration spectrum analysis |
摘要 |
An apparatus and a method are provided for detecting and measuring vibrations of a selected portion of a drill string in a bore hole. The vibrations are detected by a transducer which produces an electrical signal representative of the vibrations. The signal is applied to a band-pass filter which produces an output signal representative of vibrations occurring at frequencies within the pass band of the filter. The pass band is repetitively stepped through a predetermined frequency range under the control of digital circuitry.
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申请公布号 |
US4150568(A) |
申请公布日期 |
1979.04.24 |
申请号 |
US19780891010 |
申请日期 |
1978.03.28 |
申请人 |
GENERAL ELECTRIC |
发明人 |
BERGER, EUGENE L;RINGO, MARION M |
分类号 |
E21B44/00;E21B47/00;G01H3/08;(IPC1-7):E21B47/00 |
主分类号 |
E21B44/00 |
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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