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Flux Orientation Locating in a Drilling System

  • US 20090153141A1
  • Filed: 01/21/2009
  • Published: 06/18/2009
  • Est. Priority Date: 03/01/1991
  • Status: Abandoned Application
First Claim
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1. In a technique for at least partially establishing a positional relationship with respect to a transmitter configured for transmitting a dipole field, a method comprising:

  • positioning the transmitter at a depth below the surface of the ground in an orientation which at least generally establishes a particular pattern of magnetic fluxlines in relation to the surface of the ground, such that fore and aft signal points are defined as part of said particular pattern, each of said fore and aft signal points having a flux orientation which is normal to the surface of the ground, and which particular pattern relates in certain ways to a current position of the transmitter as characterized by a localized slope of the fluxlines relative to the surface of the ground; and

    moving an antenna arrangement, that is responsive to the localized slope of the fluxlines, through the particular pattern in relation to the surface of the ground to monitor the localized slope of the fluxlines for use in generating directional indications relating to the current position of the transmitter from a current position of the antenna arrangement.

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