声波沿钻柱最优传输特性的研究

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摘要为了利用钻柱作为声波信道实现地面与井下之间的信息传输，需要研究声波沿钻柱最优传输特性。建立用于井下信息声传输特性研究的非周期性钻柱组合模型，利用等效透声膜法，对8根不同长度的钻杆组合和不同截面积的钻杆组合的声传播特性进行了研究分析。结果表明，对于不同长度钻具组合，先增后减的钻具组合和先减后增的钻具组合的声传播特性优于其他钻具组合构建的声波钻柱模型；对于不同截面积钻具组合，先减后增的钻具组合的声传播特性优于其他钻具组合构建的声波钻柱模型。信道的建模与计算机仿真研究最优声波沿钻柱传输特性，可为声波信号更好传输研究提供有力的技术支持与测试平台。

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	周静
	邱彬
	倪文龙
	尚海燕

关键词 ：声波遥测, 数据传输, 信道特性, 声信道

Abstract：In order to develop a communication system that uses extensional stress waves in hollow steel drill pipe to carry encoded data between the bottom of well and the operator, it is necessary to know optimal signal transmission. We established an aperiodic drill-string assembly model to characterize the downhole information transmission and analyzed the characteristics of combinations of eight drill pipes of different length and different cross-sectional area by applying the reflectionless acoustic transmission model(RATO). The results showed that the ascent-then-descend(ATD) and the descend-then- ascent(DTA) pipe arrangement has more efficient energy transfer than other pipe arrangement for different lengths of bottom hole assembly(BHA); The DTA pipe arrangement has more efficient energy transfer than other pipe arrangement for different cross-sectional area of BHA. The analysis of the RATO of drill tools and the simulation of optimal transmission of the acoustic drilling string channel provide both scientific theoretical and technical foundation for the research of the acoustic telemetry.

Key words： Acoustic telemetry Data transmission Channel properties Acoustic channel

收稿日期: 2014-03-19 出版日期: 2015-09-25

引用本文:

周静，邱彬，倪文龙，尚海燕. 声波沿钻柱最优传输特性的研究[J]. 振动与冲击, 2015, 34(18): 161-165.
Zhou Jing, Qiu Bin, Ni Wenlong, Shang Haiyan. Optimization of Acoustic Communication Along the Drillstring. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(18): 161-165.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I18/161

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