Power converter and electrode combinations for electromagnetic survey source
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United States of America Patent
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Jul 14, 2015
Grant Date -
Apr 18, 2013
app pub date -
Oct 17, 2011
filing date -
Oct 17, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A marine electromagnetic survey source includes a power cable configured to couple to a high voltage power supply at one axial end and to a head unit at the other axial end. The head unit includes equipment configured to output a lower voltage at higher current than the current imparted thereto by high voltage power supply. The head unit has an electrically conductive exterior coupled to one output terminal of the equipment. An electromagnetic antenna cable having an electrode thereon is coupled to the head unit and configured to receive the output of another terminal of the head unit equipment. In some implementations, electromagnetic fields are induced in formations by conducting current to the equipment. Marine geophysical surveys are conducted utilizing such induction of electromagnetic fields.
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