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	底部钻柱近钻头动态力测量及声传输方法
	李成 ; 丁天怀 ; 陈恳 ; LI Cheng ; DING Tianhuai ; CHEN Ken
	2010-06-08 ; 2010-06-08
关键词	底部钻柱 动态力 近钻头 周期管结构 声传输 Bottom drill string Dynamic force Near-bit Periodic pipe structure Acoustic transmission TE21
其他题名	Acoustic Transmission and Measurement Method for Near-bit Dynamic Force Signal of Bottom Drill String
中文摘要	为研究随钻测井时底部钻柱近钻头动力学特性,设计直梁应变片式测力传感器,研制一种基于虚拟仪器平台的模拟钻柱动态力无线测量装置,用于模拟钻柱旋转过程中轴向力、侧向力和转矩的多线程检测。在此基础上,比较井下数据传输方法,以纵波为传输载体,设计模拟钻柱声传输装置,对动态力数据进行脉冲时延和OOK(On-offkeying)调制,沿管轴方向对有限长模拟钻柱施加纵向激励,进行模拟钻柱信道动态力测试信号的声传输试验。结果表明,系统在实验室内实现动态力数据经时延脉冲OOK信号调制后沿模拟钻柱信道的低频声波传输,为近钻头传感器测量数据的低频声传输系统的应用提供理论与试验依据。; A straight beam strain gauge sensor and a virtual instrument-based dynamic force wireless measurement device of simulated drill string are developed to study the near-bit bottom drill string dynamics in measurement while drilling.The structure and working principle of the measurement system are expressed.The axial forces,radial forces and torsional moments for rotating simulated drill string are detected multithreadedly in the laboratory.By comparing downhole data transmission methods,an acoustic transmission experimental device is established via longitudinal waves along simulated drill string.Then,the on-off keyed(OOK) modulation of time-delayed pulses is designed.The narrow pulse modulated signal transmission experiments are performed by applying the longitudinal excitation to the length-limited simulated drill string in the axial direction of pipes.The results show that the pulse time-delayed and OOK modulated dynamic force data transmission of bottom drill string is implemented by using low frequency acoustic waves along the simulated drill string channel in the laboratory,which provides the theoretical and experimental basis for the application of low-frequency acoustic transmission system of near-bit sensor measurement data.; 中国博士后科学基金资助项目(20070410516)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/49869]
专题	清华大学
推荐引用方式 GB/T 7714	李成,丁天怀,陈恳,等. 底部钻柱近钻头动态力测量及声传输方法[J],2010, 2010.
APA	李成,丁天怀,陈恳,LI Cheng,DING Tianhuai,&CHEN Ken.(2010).底部钻柱近钻头动态力测量及声传输方法..
MLA	李成,et al."底部钻柱近钻头动态力测量及声传输方法".(2010).

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