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• W4376472045 abstract "In order to improve the safety, precision and controllability of well testing in the complex deep wells and shale gas wells, The downhole Wireless monitoring platform, which is based on wireless transmission technology, sensor technology and expert system, is built to communicate the downhole and the surface. Specifically, the downhole well testing data are acquired through analysis by the expert system after the data are transmitted in form of wireless electric-magnetic waves from downhole transmitter to the receiving antenna on ground surface through composite downhole media. In the well testing period, on the one hand it can real-time get the temperature and pressure data of the down hole and other data in order to grasp the downhole situation, on the other hand downward signals from surface can be used to control downhole devices, for example dynamically adjusting the operating procedures. So it can benefit for reducing security risks and improving the quality of well testing data acquired and others. The wireless transmission system adopts the mode of “One Signal-transmitter + N Signal-repeater” and Signal transmission frequency is below 50 Hz, with effective transmission distance of Signal Transmitter 2500–3500 m and Signal-Repeater 1500–2000 m. The system technical capacity is that the theoretical transmission distance can reach 5000–7000 m (N equals 2 or 3), with data transmission rate of 12bit/s, temperature resistance of 177 ℃, pressure resistance of 140 MPa and more than 30 days of sustainable work. The expert system is mainly composed of the Ground Antenna and the Analysis Platform, and the recognizable signal resolution of the expert system reaches 10−5 V by the suppression of “power frequency” interference on the ground. At present, the technology has been successfully applied for well testing more than 20 wells in Sichuan Province of China in the different conditions such as drifting, scraping, acidizing, flowback and, pressure-recovery and other operations to realize the data interconnection of the downhole and the surface. In Field application, the maximum well depth reaches 5050 m, the continuous working time is more than 478 h. It proved the feasibility and reliability of the technology, having a very good application prospects." @default.
• W4376472045 created "2023-05-14" @default.
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• W4376472045 date "2023-01-01" @default.
• W4376472045 modified "2023-10-16" @default.
• W4376472045 title "The Downhole Wireless Monitoring in Well Testing" @default.
• W4376472045 cites W2114663233 @default.
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• W4376472045 doi "https://doi.org/10.1007/978-981-99-2649-7_7" @default.
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