发明名称 |
Sonic data logging system |
摘要 |
A sonic logging method involves the pre-processing of a detection signal by a downhole processing device to determine the arrival time of a sonic signal at a receiver which is then transmitted to the surface. A suitable sonic logging downhole tool includes a control device for controlling generation and reception of the sonic signal, an A-D converter for digitizing the detected signal at a predetermined sampling interval, a first memory for storing the digitized waveform, a second memory for storing a program for processing the digitized waveform, and a microprocessor capable of executing the stored program so as to determine an arrival time of the sonic signal arriving at the receiver.
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申请公布号 |
US6205087(B1) |
申请公布日期 |
2001.03.20 |
申请号 |
US19980117514 |
申请日期 |
1998.11.16 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
FUKUHARA MASAFUMI;TEJADA MAURICIO |
分类号 |
E21B47/12;G01H5/00;G01V1/28;G01V1/40;G01V1/48;(IPC1-7):G01V1/00 |
主分类号 |
E21B47/12 |
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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