System including an arrangement for tracking the positional relationship between a boring tool and one or more buried lines and method
First Claim
1. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes at least one electrically conductive in-ground line, an arrangement for tracking a specific positional relationship between the boring tool and said line, said arrangement comprising:
- a) first means for generating a magnetic field from one of either said boring tool or at least from an underground length of said line;
b) second means carried by said boring tool if said field is generated from said line or connected to said line if said field is generated from said boring tool for detecting a relative change in a particular characteristic of said field, which characteristic varies as a function of said specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region;
c) third means for monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and
d) fourth means for correlating the detected relative changes in said characteristic with the value of said one parameter in a way which indicates certain changes in the positional relationship between said boring tool and said line without the need to establish an actual distance between the boring tool and said line, said fourth means including means for producing discreet audio signals uniquely representative of a series of specific positional relationships between said boring tool and said line as the boring tool moves through the ground within said region.
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Accused Products
Abstract
A system is disclosed in which a boring tool is moved through the ground in a region which includes at least one electrically conductive in-ground line. The system includes an arrangement for tracking a specific positional relationship between the boring tool and one or more in-ground lines. The arrangement generates a magnetic field from one of either the boring tool or the line. A particular characteristic of the generated field is detected at the boring tool if the field is generated from the line or is detected at the line if the field is generated from the boring tool. The characteristic varies as a function of the specific positional relationship between the boring tool and the line as the boring tool moves through the ground within the region. The arrangement is responsive to the detection of the characteristic and indicates certain changes in the positional relationship between the boring tool and each one of the lines being monitored irrespective of the approach path or orientation of the boring tool with respect to each line.
53 Citations
50 Claims
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1. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes at least one electrically conductive in-ground line, an arrangement for tracking a specific positional relationship between the boring tool and said line, said arrangement comprising:
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a) first means for generating a magnetic field from one of either said boring tool or at least from an underground length of said line; b) second means carried by said boring tool if said field is generated from said line or connected to said line if said field is generated from said boring tool for detecting a relative change in a particular characteristic of said field, which characteristic varies as a function of said specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region; c) third means for monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and d) fourth means for correlating the detected relative changes in said characteristic with the value of said one parameter in a way which indicates certain changes in the positional relationship between said boring tool and said line without the need to establish an actual distance between the boring tool and said line, said fourth means including means for producing discreet audio signals uniquely representative of a series of specific positional relationships between said boring tool and said line as the boring tool moves through the ground within said region. - View Dependent Claims (5, 6, 7)
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2. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes at least one electrically conductive in-ground line, a method of tracking a specific positional relationship between the boring tool and said line, said method comprising the steps of:
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a) generating a magnetic field from one of either said boring tool or said line; b) detecting a relative change in a particular characteristic of said field from said line if said field is generated from said boring tool or from said boring tool if said field is generated from said line, said characteristic varying as a function of said specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region; c) monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and d) determining certain changes in the positional relationship between said boring tool and said line by correlating the detected relative change in said characteristic with the value of said one parameter without the need for establishing an actual distance between the boring tool and said line and indicating said changes by producing audio and/or visual signals which are uniquely representative of the specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region. - View Dependent Claims (47, 48, 49)
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3. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes at least one electrically conductive in-ground line, an arrangement for tracking a specific positional relationship between the boring tool and said line, said arrangement comprising:
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a) first means for generating a magnetic field from one of either said boring tool or at least from an underground length of said line; b) second means carried by said boring tool if said field is generated from said line or connected to said line if said field is generated from said boring tool for detecting a relative change in a particular characteristic of said field, which characteristic varies as a function of said specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region; c) third means for monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and d) fourth means for correlating the detected relative changes in said characteristic with the value of said one parameter in a way which indicates certain changes in the positional relationship between said boring tool and said line without the need to establish an actual distance between the boring tool and said line. - View Dependent Claims (4, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes a plurality of electrically conductive in-ground lines, an arrangement for tracking the specific positional relationships between the boring tool and each of said lines, said arrangement comprising:
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a) transmitter means for generating a magnetic field from said boring tool; b) a plurality of detector means, each of which is connected with a respective line for detecting a relative change in a particular characteristic of said field, which characteristic varies as a function of said specific positional relationship between said boring tool and each of said lines as the boring tool moves through the ground within said region; c) monitoring means for monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and d) means cooperating with said plurality of detector means for correlating the detected relative changes in said characteristic with the value of said one parameter in a way which indicates certain changes in the positional relationship between said boring tool and each respective line without the need to establish an actual distance between the boring tool and each line. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes a plurality of electrically conductive in-ground lines, an arrangement for tracking the specific positional relationships between the boring tool and each of said lines, said arrangement comprising:
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a) a plurality of transmitter means, each said transmitter means generating a magnetic field at least from an underground length of each respective line; b) detector means carried by said boring tool for detecting a relative change in a particular characteristic of said fields, which characteristic varies for each line as a function of its specific positional relationship with the boring tool as the boring tool moves through the ground within said region; c) monitoring means for monitoring a value of at least one parameter relating to the way in which said drill string is fed out; and d) means responsive to said detector means and said monitoring means for correlating the detected relative changes in said characteristic of said fields with the value of said one parameter in a way which indicates certain changes in the specific positional relationship between said boring tool and each respective line without the need to establish an actual distance between the boring tool and said line. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. In a system in which a boring tool including a drill string having a length which is fed out in a way which moves the boring tool through the ground in a region which includes at least one electrically conductive in-ground line, a method of tracking a specific positional relationship between the boring tool and said line, said method comprising the steps of:
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a) generating a magnetic field from one of either said boring tool or an underground length of said line; b) detecting a relative change in a particular characteristic of said field from said line if said field is generated from said boring tool or from said boring tool if said field is generated from said line, said characteristic varying as a function of said specific positional relationship between said boring tool and said line as the boring tool moves through the ground within said region; c) monitoring a value of at least one parameter relating to the way in which said drill string is fed out, and d) indicating certain changes in the positional relationship between said boring tool and said line by correlating the detected relative change in said characteristic with the value of said one parameter without the need for establishing an actual distance between the boring tool and said line. - View Dependent Claims (46, 50)
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Specification