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CONFIGURABLE MAGNET ASSEMBLY FOR USING IN NMR WELL LOGGING INSTRUMENT

  • US 20090102478A1
  • Filed: 10/18/2007
  • Published: 04/23/2009
  • Est. Priority Date: 10/18/2007
  • Status: Active Grant
First Claim
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1. A magnet assembly for measuring properties of a formation from a borehole, the magnet assembly comprising:

  • a first device and a second device, each device adapted for insertion into the borehole, the first device producing a first magnetic field, the second device producing a second magnetic field;

    wherein the second magnetic field is configurable for one of reinforcing and reducing the first magnetic field to produce a magnetic field used for the measuring; and

    wherein the first device comprises a permanent magnet and the second device comprises at least one of one of a switchable magnet and switching windings.

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