Development of Eccentric Transmitter Transducer for LWD Acoustic Remote Detection
To address the challenge that traditional logging while drilling (LWD) acoustic transducers lack directional radiation capability, hindering the identification of geological structures outside the borehole in drilling environments, this study developed an eccentric transmitter transducer transducer...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Well Logging Technology
2025-06-01
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| Series: | Cejing jishu |
| Subjects: | |
| Online Access: | https://www.cnpcwlt.com/en/#/digest?ArticleID=5751 |
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| Summary: | To address the challenge that traditional logging while drilling (LWD) acoustic transducers lack directional radiation capability, hindering the identification of geological structures outside the borehole in drilling environments, this study developed an eccentric transmitter transducer transducer with directional radiation functionality. Numerical simulations of the transducer’s vibration modes, frequency response, and emission voltage level (EVL) are conducted via the finite element method, followed by prototype fabrication and anechoic tank testing. Experimental results demonstrated an EVL of 125 dB at 4.2 kHz, with horizontal directivity curves showing peak radiation energy at the 80° azimuth, consistent with theoretical simulations. The third-order bending vibration mode enabled directional energy radiation toward a specific side of the drill collar, fulfilling the requirements of low-frequency high-energy emission and asymmetric radiation for LWD acoustic remote detection. This transducer provides an effective solution for LWD acoustic remote detection, though future work should focus on optimizing high-temperature/high-pressure encapsulation and structural parameters. |
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| ISSN: | 1004-1338 |