22 February 2008 High-speed well-logging cable telemetry system based on correlative encoding
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Proceedings Volume 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology; 662210 (2008) https://doi.org/10.1117/12.790815
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China
Abstract
The common seven-core well logging cable can be able to transmit the maximum rate of 200kb/s for base band signal. This situation causes great difficulty in increasing signal transmission rate. In this paper, a high-speed well-logging cable telemetry system scheme was proposed. Based on correlative encoding and considered perpendicular multi-levels amplitude modulation to increase carrying signal for each code at the same time, and adopted equilibrium technique in time domain to spread the transmission bandwidth of well logging cable, a high-speed well-logging cable telemetry system scheme was designed. The simulated results indicate that after technique improving, the transmitting rate of seven-core well logging cable may be increased up to 400-500kb/s. This system has the advantages of taking less space, low power consumption, transmitting faster and easy for repairing or upgrading. Also the system can meet the basic need of the data transmitting speed demand of imaging well-logging system at the time begin.
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Qiwei Lin, "High-speed well-logging cable telemetry system based on correlative encoding", Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 662210 (22 February 2008); doi: 10.1117/12.790815; https://doi.org/10.1117/12.790815
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