发明名称 |
VERFAHREN UND ANORDNUNG ZUR ROHRDICKENBESTIMMUNG |
摘要 |
<p>An electromagnetic thickness tool is disclosed to produce a measurement of the wall-thickness of a ferromagnetic casing corrected for the effects of casing permeability. First apparatus provides an uncorrected thickness signal proportional to the thickness of the casing uncorrected for the effects of casing permeability. A second apparatus provides a permeability signal representative of the permeability of the casing. A signal processor uses the mathematical square root of the permeability signal as a correction factor for the uncorrected thickness signal for generating the corrected value. The second apparatus, responsive to a signal proportional to the magnitude of the inside diameter of the casing, corrects the permeability signal for the effects of casing inside diameter.</p> |
申请公布号 |
DE2950293(A1) |
申请公布日期 |
1980.06.26 |
申请号 |
DE19792950293 |
申请日期 |
1979.12.14 |
申请人 |
SOCIETE DE PROSPECTION ELECTRIQUE SCHLUMBERGER |
发明人 |
S. SMITH,GLENN |
分类号 |
E21B47/08;(IPC1-7):01B7/10;01B7/06;21B47/00 |
主分类号 |
E21B47/08 |
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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