Realtime downhole imaging, multiparameter monitoring, and inspection using DSL technology based on DMT modulation with two-wire transmission

Chengbin Liao; Jian Zhang; Liying Wu

doi:10.1117/12.456103

14 February 2002 Realtime downhole imaging, multiparameter monitoring, and inspection using DSL technology based on DMT modulation with two-wire transmission

Chengbin Liao, Jian Zhang, Liying Wu

Author Affiliations +

Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456103
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

Abstract

This paper focuses mainly on DMT transmission technology applying to downhole image transmission to extend bandwidth, also considers the details about using digital signal processor (DSP) to compress, process and reconfigure the image taken from infrared CCD camera and to process signals from multi-parameter sensors. The system is composed of multi-parameter sensors, infrared camera, TMS320c6x DSP for image compression and reconfiguration, ADSL modem chipset, ground computer, etc., which extends the bandwidth, decreases signal attenuation and abates the noise. Therefore system implements real time downhole imaging, multi-parameter monitoring and inspection by two-wire transmission over 7000 feet no repeaters.

Citation Download Citation

Chengbin Liao, Jian Zhang, and Liying Wu "Realtime downhole imaging, multiparameter monitoring, and inspection using DSL technology based on DMT modulation with two-wire transmission", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); https://doi.org/10.1117/12.456103

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