Study of magnetic ranging technology in horizontal directional drilling |
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Authors: | Tao LiuAuthor Vitae Boxiong WangAuthor Vitae |
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Affiliation: | State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China |
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Abstract: | Intersection technology plays a key role in long-distance horizontal directional drilling (HDD). Magnetic ranging technology is an effective way to realize the intersection. A three-dimensional magnetic field model suitable for the cylindrical magnet connected with drilling bit was established. New formulae of magnetic induction intensity were deduced from the fundamental formulae to suit to the new magnetic ranging method. Based on the new formulae, a curve fitting model was established to complete the ranging. The whole process is simple and effective. The result of the experiment proved the feasibility of the new method and the accuracy is high enough for HDD. |
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Keywords: | Magnetic ranging Magnetic field mode Intersection Horizontal directional drilling |
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