Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide
A new method of wireless data telemetry used by oil industry uses compressional acoustic waves to transmit downhole information from the bottom hole to the surface. Unfortunately, acoustic echoes and drilling vibration noises in periodic drillstring are a major issue in transmission performance. A c...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/741314 |
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| author | Li Cheng Chang Jinfeng Liu Zhao Fan Shangchun Ding Tianhuai |
| author_facet | Li Cheng Chang Jinfeng Liu Zhao Fan Shangchun Ding Tianhuai |
| author_sort | Li Cheng |
| collection | DOAJ |
| description | A new method of wireless data telemetry used by oil industry uses compressional acoustic waves to transmit downhole information from the bottom hole to the surface. Unfortunately, acoustic echoes and drilling vibration noises in periodic drillstring are a major issue in transmission performance. A combined acoustic echo and noise suppression method based on wave motion characteristic in drillstring is adopted to enhance an upward-going transmitted acoustic signal. The presented scheme consists of a primary acoustic echo canceller using an array of two accelerometers for dealing with the downward-going noises and a secondary acoustic insulation structure for restraining the upward-going vibration noises. Furthermore, the secondary acoustic insulation structure exhibits a banded and dispersive spectral structure because of periodic groove configuration. By using a finite-differential algorithm for the one-dimensional propagation of longitudinal waves, acoustic receiving characteristics of transmitted signals are simulated with additive Gaussian noise in a periodic pipe structure of limited length to investigate the effects on transmission performance optimization. The results reveal that the proposed scheme can achieve a much lower error bit ratio over a specified acoustic isolation frequency range with a 30–40 dB reduction in the average noise level compared to traditional single-receiver scheme. |
| format | Article |
| id | doaj-art-4f044bc178fc4713a9d042419fe3306e |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-4f044bc178fc4713a9d042419fe3306e2025-08-20T02:05:38ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/741314741314Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring WaveguideLi Cheng0Chang Jinfeng1Liu Zhao2Fan Shangchun3Ding Tianhuai4State Key Laboratory of Virtual Reality Technology and System, Beihang University, Beijing 100191, ChinaState Key Laboratory of Virtual Reality Technology and System, Beihang University, Beijing 100191, ChinaState Key Laboratory of Virtual Reality Technology and System, Beihang University, Beijing 100191, ChinaState Key Laboratory of Virtual Reality Technology and System, Beihang University, Beijing 100191, ChinaDepartment of Precision Instruments and Mechanology, Tsinghua University, Beijing 100086, ChinaA new method of wireless data telemetry used by oil industry uses compressional acoustic waves to transmit downhole information from the bottom hole to the surface. Unfortunately, acoustic echoes and drilling vibration noises in periodic drillstring are a major issue in transmission performance. A combined acoustic echo and noise suppression method based on wave motion characteristic in drillstring is adopted to enhance an upward-going transmitted acoustic signal. The presented scheme consists of a primary acoustic echo canceller using an array of two accelerometers for dealing with the downward-going noises and a secondary acoustic insulation structure for restraining the upward-going vibration noises. Furthermore, the secondary acoustic insulation structure exhibits a banded and dispersive spectral structure because of periodic groove configuration. By using a finite-differential algorithm for the one-dimensional propagation of longitudinal waves, acoustic receiving characteristics of transmitted signals are simulated with additive Gaussian noise in a periodic pipe structure of limited length to investigate the effects on transmission performance optimization. The results reveal that the proposed scheme can achieve a much lower error bit ratio over a specified acoustic isolation frequency range with a 30–40 dB reduction in the average noise level compared to traditional single-receiver scheme.http://dx.doi.org/10.1155/2014/741314 |
| spellingShingle | Li Cheng Chang Jinfeng Liu Zhao Fan Shangchun Ding Tianhuai Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide Shock and Vibration |
| title | Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide |
| title_full | Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide |
| title_fullStr | Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide |
| title_full_unstemmed | Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide |
| title_short | Characteristics Analysis of Joint Acoustic Echo and Noise Suppression in Periodic Drillstring Waveguide |
| title_sort | characteristics analysis of joint acoustic echo and noise suppression in periodic drillstring waveguide |
| url | http://dx.doi.org/10.1155/2014/741314 |
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