发明名称 |
Modal transmission method and apparatus for multi-conductor wireline cables. |
摘要 |
Apparatus and methods are disclosed for transmitting multiple, independent electrical signals over a conventional wireline logging cable while avoiding the bandwidth limitations encountered with customary schemes. Each signal is carried on a plurality of conductor pairs (e.g., two pairs) arranged symmetrically such that the net signal coupled into non-involved conductors is zero. With no coupling, frequency-dependent mutual impedance losses are effectively eliminated.
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申请公布号 |
EP0352869(A2) |
申请公布日期 |
1990.01.31 |
申请号 |
EP19890201991 |
申请日期 |
1989.07.27 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
COWLES, CHRISTOPHER SMITH;LEVEILLE, JACQUES PIERRE |
分类号 |
G08C19/00;G01V1/22;G01V1/40;G01V3/34;H04B3/00;H04L5/20 |
主分类号 |
G08C19/00 |
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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