Title :
Electric Drill Stem Telemetry
Author :
Bhagwan, J. ; Trofimenkoff, F.N.
Author_Institution :
Department of Electrical Engineering, The University of Calgary, Calgary, Alta., Canada T2N 1N4
fDate :
4/1/1982 12:00:00 AM
Abstract :
Use of the drill stem-earth system for electric down-hole-to- surface telemetry at low frequencies is considered in this article. Estimates of signal attenuation for both the perfectly conducting drill stem and a drill stem with finite conductivity are obtained and compared with previously reported work. It appears that a link of several kilometers length can be operated at frequencies in the hertz range in 10-100-¿ · m earth at power levels of the order of a few watts.
Keywords :
Conductivity; Contact resistance; Earth; Electric resistance; Electrodes; Ellipsoids; Frequency; H infinity control; Surface resistance; Telemetry;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.1982.350397
