Method of Estimating Communication Zone using the Capacitance-coupled Circuit Model in Contactless Electric-field Intrabody Communication

Minotani, Tadashi; Ochiai, Keiichi; Mizota, Tsutomu; Morisawa, Fumiharu; Fujii, Kouji; Morimura, Hiroki; Shinagawa, Morikazu

doi:10.1541/ieejeiss.134.1024

Cited by 1 publication

(1 citation statement)

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“…Capacitance can be used to realize the transmission of power and signals based on charge induction between two metal plates. [19][20][21][22] Considering that the drill pipe joint provides a good distribution space for the electrode plate of the capacitance, an intelligent drilling communication system based on a capacitance coupling method is proposed in this paper. This proposed method utilizes the drill string and well casing to constitute a signal transmission line.…”

Section: Introductionmentioning

confidence: 99%

Propagation modeling and performance analysis of intelligent drilling communication system based on capacitance coupling approach

Liu

Yang

et al. 2017

SIMULATION

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A new type of intelligent drilling communication system is proposed based on capacitance coupling in order to realize signal transmission in the downhole environment. A system model is established and the dispersion equation is derived. Group velocity, propagation constant, attenuation factor, and the terminal matching condition of the system are discussed according to theoretical derivations. Simulations of a large number of drill pipe units in the time domain, based on the fourth-order Runge-Kutta method, are described to verify the mathematical derivations. An experimental system of lumped parameter components has been established, which verifies the effectiveness of the simulation. Analytical and simulation results show that the carrier frequency can be as high as 0.843 MHz, and that the bandwidth of the proposed system can reach up to about 406 kHz. The results can provide a theoretical basis and comprehensive design guidance for the frequency, communication rate, and bandwidth budget of intelligent drilling communication systems.

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Section: Introductionmentioning

confidence: 99%