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Centralizer-based survey and navigation device and method

  • US 7,584,808 B2
  • Filed: 12/14/2005
  • Issued: 09/08/2009
  • Est. Priority Date: 12/14/2004
  • Status: Active Grant
First Claim
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1. A metrology device, comprising:

  • at least one sensor string segment;

    at least three centralizers;

    at least one metrology sensor; and

    at least one odometry device; and

    wherein said metrology sensor is a displacement detector; and

    wherein said displacement detector is configured to measure the displacement of a straight beam relative to one of said at least three centralizers; and

    wherein said straight beam is fixed to a first centralizer and a third centralizer, where said one of said three centralizers is a second centralizer between said first and second centralizers.

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