专利名称：Establishing Positions of Locating Field
Detectors and Path Mapping inUnderground Boring Tool Applications
发明人：Guenter W. Brune,Peter H. Hambling,John E.
Mercer,Lloyd A. Moore,Shiu S. Ng,RudolfZeller
申请号：US12022093申请日：20080129
公开号：US20080121431A1公开日：20080529
专利附图：
摘要：Specific apparatus and associated methods are described for use in establishingthe positions of locating field detectors and for path mapping within a region for thepurpose of tracking and/or guiding the movement of an underground boring tool. In oneaspect, an improvement is provided forming part of an arrangement for tracking theposition and/or guiding the boring tool using an electromagnetic locating signal which istransmitted from the boring tool as the boring tool moves through the ground. At leasttwo detectors are located at fixed positions within the region, each being operable in atransmit mode and in a receive mode such that each one of the detectors in the transmitmode is able to transmit a relative locating signal to the other detector for use indetermining the relative position of one detector in relation to the other and such thatboth detectors receive the electromagnetic locating signal in the receive mode for use indetermining the position of the boring tool within the region. Provisions are alsodescribed for extending drilling range by using additional detectors by moving a limitednumber of detectors. In another aspect, a system is provided including at least two aboveground detectors for sensing the locating signal. The detectors are located at initialpositions in the region. Electromagnetic data is generated by the detectors with theboring tool at multiple positions to generate electromagnetic data which is used toidentify the positions of the detectors. A selected flux pathline steering technique isintroduced.
申请人：Guenter W. Brune,Peter H. Hambling,John E. Mercer,Lloyd A. Moore,Shiu S.Ng,Rudolf Zeller
地址：Bellevue WA US,Bellevue WA US,Kent WA US,Renton WA US,Kirkland WAUS,Seattle WA US
国籍：US,US,US,US,US,US
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