Bore location system
First Claim
1. A system for locating a horizontal bore below a ground surface, said system comprising:
- a transmitting source configured to radiate from said bore a dipole magnetic field aligned with said bore;
a receiver remote from said transmitting source and having a first coil and a second coil, each coil defining an axis, wherein said axes of said first coil and said second coil are orthogonal to each other; and
a measurement device in communication with said coils and configured to measure the phase of signals induced on said coils by said magnetic field when said axis of said first coil is horizontally perpendicular to the axis of said magnetic field and said axis of said second coil is vertically perpendicular to said axis of said magnetic field, and determine the lateral position of said transmitting source relative to said coils responsively to said phase of said signals on said first coil and said second coil.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for locating a horizontal bore below a ground surface includes a transmitting source configured to radiate from the bore a dipole magnetic field aligned with the bore. A receiver is located remote from the transmitting source and has a first coil and a second coil. Each coil defines an axis, wherein the axes of the first coil and the second coil are orthogonal to each other. A measurement device is in communication with the coils and configured to measure the phase of signals induced on the coils by the magnetic field when the axis of the first coil is horizontally perpendicular to the axis of the magnetic field and the axis of the second coil is vertically perpendicular to the axis of the magnetic field. The measurement device is also configured to determine the lateral position of the transmitting source relative to the coils responsively to the phase of the signals on the first coil and the second coil.
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Citations
9 Claims
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1. A system for locating a horizontal bore below a ground surface, said system comprising:
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a transmitting source configured to radiate from said bore a dipole magnetic field aligned with said bore;
a receiver remote from said transmitting source and having a first coil and a second coil, each coil defining an axis, wherein said axes of said first coil and said second coil are orthogonal to each other; and
a measurement device in communication with said coils and configured to measure the phase of signals induced on said coils by said magnetic field when said axis of said first coil is horizontally perpendicular to the axis of said magnetic field and said axis of said second coil is vertically perpendicular to said axis of said magnetic field, and determine the lateral position of said transmitting source relative to said coils responsively to said phase of said signals on said first coil and said second coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for locating a horizontal bore below a ground surface, said method comprising the steps of:
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radiating from a transmitting source within said bore a dipole magnetic field aligned with said bore;
providing a first coil and a second coil remote from said transmitting source, wherein each coil defines an axis and wherein said axes of said first coil and said second coil are orthogonal to each other;
measuring the phase of signals induced on said coils by said magnetic field when said axis of said first coil is horizontally perpendicular to the axis of said magnetic field and said axis of said second coil is vertically perpendicular to said axis of said magnetic field; and
determining the lateral position of said transmitting source relative to said coils responsively to said phase of said signals on said first coil and said second coil.
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Specification