Abstract
The use of acoustic waves to transmit information from sensors installed near the drilling head during the drilling process of oil wells is a promising technology. However, this method suffers from the high fading at certain bands due to the structure of the drill string, which consists of pipes connected by tool joints. This structure decreases the total bandwidth available for transmission up to 60 percent. This paper investigates the possibility of redesigning the drill string to increase the available bandwidth for information transmission. We have built a test- bed to study the drill-string acoustic channel experimentally. We adopted three pipe strings; each has a tool-joint with a different length. The results reveal that the channel frequency response of pipe string varies depending on the tool joint length. We also look at channel properties such as mean excess delay and Root Mean Square (RMS) delay spread, maximum excess delay, and coherence bandwidth for various pipe string configurations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
