System for tracking a downhole tool assembly using dual above-ground receiver assemblies
First Claim
1. A tracking system comprising:
- a transmitter configured to emit a dipole magnetic field;
a first receiver assembly configured to detect the dipole magnetic field in three dimensions and generate a first antenna signal indicative of the detected field;
a first radio antenna to transmit the first antenna signal;
a second receiver assembly which is movable relative to both the first receiver assembly and the transmitter, configured to detect the dipole magnetic field in three dimensions substantially simultaneously with the first receiver assembly and generate a second antenna signal indicative of the detected field;
a second radio antenna to receive the first antenna signal from the first radio antenna; and
a processor configured to receive the first and second antenna signals and determine a subsurface location of the transmitter using the first and second antenna signals.
3 Assignments
0 Petitions
Accused Products
Abstract
A system for identifying the location of a dipole magnetic field source below ground. The system comprises a first receiver assembly and a second receiver assembly each configured to detect the dipole magnetic field in three dimensions from a transmitter and generate antenna signals indicative of the detected dipole magnetic field. The first receiver assembly detects the dipole magnetic field from the transmitter substantially simultaneously as the second receiver assembly simultaneously detects the dipole magnetic field from the transmitter. The second receiver assembly is movable relative to both the first receiver assembly and the transmitter. A processor determines the location of the transmitter below ground based on the antenna signals generated by the first and second receiver assemblies.
19 Citations
16 Claims
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1. A tracking system comprising:
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a transmitter configured to emit a dipole magnetic field; a first receiver assembly configured to detect the dipole magnetic field in three dimensions and generate a first antenna signal indicative of the detected field; a first radio antenna to transmit the first antenna signal; a second receiver assembly which is movable relative to both the first receiver assembly and the transmitter, configured to detect the dipole magnetic field in three dimensions substantially simultaneously with the first receiver assembly and generate a second antenna signal indicative of the detected field; a second radio antenna to receive the first antenna signal from the first radio antenna; and a processor configured to receive the first and second antenna signals and determine a subsurface location of the transmitter using the first and second antenna signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An assembly to track the subsurface location of a transmitter, the assembly comprising:
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a frame; a radio antenna supported on the frame to receive a first antenna signal from a first antenna assembly, the first antenna signal being indicative of a dipole magnetic field detected in three dimensions from a first side of the transmitter; a second antenna assembly, movable relative to both the first antenna assembly and the transmitter, configured to generate a second antenna signal indicative of the dipole magnetic field detected in three dimensions from a second side of the transmitter; and a processor supported on the frame configured to receive the first and second antenna signals and determine a subsurface location of the transmitter using the first and second antenna signals. - View Dependent Claims (16)
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Specification