{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T10:48:20Z","timestamp":1775731700305,"version":"3.50.1"},"reference-count":31,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T00:00:00Z","timestamp":1775692800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key Equipment for Ultra-Deep Well Logging of China","award":["2025ZD1402103"],"award-info":[{"award-number":["2025ZD1402103"]}]},{"name":"Intelligent Optical Fiber Logging and Digital Oil & Gas Field Technology Research Team Project of China","award":["T2023005"],"award-info":[{"award-number":["T2023005"]}]},{"name":"Unconventional Intelligent Drilling and 10,000-m Coiled Tubing Downhole Tools of China","award":["2025ZD1404600"],"award-info":[{"award-number":["2025ZD1404600"]}]},{"name":"Open Fund of Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering (Yangtze University) of China","award":["YQZC202512"],"award-info":[{"award-number":["YQZC202512"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In Coiled Tubing (CT) acoustic telemetry, the reliability of surface signal reception is severely challenged by the \u201ccontact dead zone\u201d of traditional probes and complex nonstationary environmental noise. To address these issues, this paper proposes a hardware-software integrated solution for high-fidelity signal extraction. In terms of hardware, a novel pickup probe based on the micro-lever principle is developed. By utilizing a pivoted lever structure with an optimized arm ratio of 2.6 to 1 and a full pressure-balanced mechanism, the design physically overcomes the contact dead zone inherent in traditional pressure-compensating probes and effectively isolates low frequency common-mode interference through a lateral floating architecture. In terms of software, a joint denoising model combining Complete Ensemble Empirical Mode Decomposition with Adaptive Noise and wavelet thresholding is proposed. A cross-correlation coefficient criterion is introduced to adaptively screen intrinsic mode functions and eliminate residual fluid turbulence noise. Field experiments on a 1500 ft full-scale circulation loop demonstrate that the proposed probe improves the detection sensitivity of the radial breathing mode by approximately 20.6 dB compared to the baseline, while effectively eliminating stick-slip friction noise during dynamic tripping. Furthermore, the joint algorithm increases the Signal to noise Ratio by an additional 16.9 dB under typical pumping conditions of 0.5 bpm, with a normalized cross-correlation exceeding 0.96. These results verify that the proposed method effectively solves the bottleneck of weak signal detection in deep wells, providing robust technical support for CT telemetry operations.<\/jats:p>","DOI":"10.3390\/s26082315","type":"journal-article","created":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T09:46:23Z","timestamp":1775727983000},"page":"2315","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High-Fidelity Weak Signal Extraction for Coiled Tubing Acoustic Telemetry via Micro-Lever Suspension and Joint Denoising"],"prefix":"10.3390","volume":"26","author":[{"given":"Yingjian","family":"Xie","sequence":"first","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hao","family":"Geng","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"},{"name":"State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhihao","family":"Wang","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haojie","family":"Xu","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hu","family":"Han","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dong","family":"Yang","sequence":"additional","affiliation":[{"name":"Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan 430100, China"},{"name":"School of Petroleum Engineering, Yangtze University, Wuhan 430100, China"},{"name":"State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization, Yangtze University, Wuhan 430100, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,9]]},"reference":[{"key":"ref_1","first-page":"122","article-title":"Current status and development trend of measurement & control while drilling technology","volume":"52","author":"Wang","year":"2024","journal-title":"Pet. 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