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A telegrapher equation for electric - telemetering in drill strings | IEEE Journals & Magazine | IEEE Xplore

A telegrapher equation for electric - telemetering in drill strings


Abstract:

A reliable method of transmitting downhole information to the surface while drilling is essential to improve drilling applications. We have designed a numerical algorithm...Show More

Abstract:

A reliable method of transmitting downhole information to the surface while drilling is essential to improve drilling applications. We have designed a numerical algorithm for simulation of electric-signal transmission through the drill string, based on the telegrapher equation (a circuit model). The drill string is then represented by a transmission line with varying geometrical and electromagnetic properties versus depth, depending on the characteristics of the drill string/formation system. These properties are implicitly modeled by the series impedance and the shunt admittance of the transmission line. The telegrapher equation is solved in the high-frequency range by using a direct method.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 40, Issue: 5, May 2002)
Page(s): 1047 - 1053
Date of Publication: 31 May 2002

ISSN Information:


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