Analysis and Experimental Research on the Factors Affecting Downhole Inductive Electromagnetic Wave Wireless Short-Hop Transmission | IEEE Journals & Magazine | IEEE Xplore

Analysis and Experimental Research on the Factors Affecting Downhole Inductive Electromagnetic Wave Wireless Short-Hop Transmission


Abstract:

Wireless short-hop communication is a crucial solution for information transmission between logging while drilling (LWD) and measurement while drilling (MWD). It is impor...Show More

Abstract:

Wireless short-hop communication is a crucial solution for information transmission between logging while drilling (LWD) and measurement while drilling (MWD). It is important for closed-loop control in geosteering drilling. Compared with wired transmission, wireless short-hop communication offers a cost-effective and stable alternative. Besides, it reduces drilling risks and improves efficiency. Current research primarily concentrates on magnetic dipole (MD) antennas, where resistivity stands as the only continuous variable under investigation, and discussions regarding other parameters may be constrained. It lacks complex models and fails to account for factors such as borehole mud and antenna slots. This article utilizes the finite element method (FEM) to examine the transmitting and receiving characteristics of electric dipole (ED) and MD antennas. Investigate the effects of transmission conditions and instrument structure on the signal. Experimental validation in a water tank substantiates the reliability and practicality of numerical simulation results. It suggests that using a coil number between 150 and 200 turns with a frequency of 5–8 kHz for both antenna structures in oil-based mud can achieve transmission distances of over 15 m. The antenna slot has minimal impact on the signal. Design considerations should prioritize overall structural stability and mechanical strength. These findings contribute valuable insights to the design and optimization of the instrument.
Article Sequence Number: 5915011
Date of Publication: 08 May 2024

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