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Marine electromagnetic measurement system

  • US 6,842,006 B2
  • Filed: 06/27/2002
  • Issued: 01/11/2005
  • Est. Priority Date: 06/27/2002
  • Status: Expired due to Fees
First Claim
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1. A sea-floor electromagnetic measurement device for obtaining underwater measurements of earth formations, comprising:

  • a central structure;

    a plurality of arms having a first end and a second end, the second end pivotally coupled to the central structure, the first end being a free end;

    at least one electrode coupled to each of the arms; and

    at least two magnetometers coupled to ones of the arms, wherein the magnetometers are positioned a selected distance from the central structure so that magnetic fields produced by electric currents in the central structure do not substantially affect the measurements made by the magnetometers.

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