发明名称 |
SHIELDING METHOD AND APPARATUS USING FLEXIBLE STRIP |
摘要 |
A shielding method and apparatus for an antenna disposed on an elongated support adapted for disposal within a borehole. The shield providing predetermined attenuation of one or more electromagnetic energy field components as the field components interact with the shield. The shield composed of a flexible strip or cylindrical body and respectively comprising a transverse conductive element or a transverse slot therein. The shields being adapted to cover an antenna mounted on the support. The shields being compatible for use in conjunction with saddle, tilted coils or multi-layered tri-axial coils to produce a pure transverse magnetic dipole electromagnetic field. The shields are also used in methods for shielding an antenna disposed on a support to provide predetermined attenuation of an electromagnetic field component as the field components interact with the shield.
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申请公布号 |
US2003155923(A1) |
申请公布日期 |
2003.08.21 |
申请号 |
US20030382237 |
申请日期 |
2003.03.05 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
OMERAGIC DZEVAT;SEYDOUX JEAN;ROSTHAL RICHARD A. |
分类号 |
G01V3/08;G01V3/28;G01V3/30;H01Q7/00;H01Q17/00;(IPC1-7):G01V3/18 |
主分类号 |
G01V3/08 |
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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