| 声波在钻柱中的传播特性 |
| |
| 引用本文： | 赵国山,管志川,刘永旺.声波在钻柱中的传播特性[J].中国石油大学学报(自然科学版),2010,34(1). |
| |
| 作者姓名： | 赵国山 管志川 刘永旺 |
| |
| 作者单位： | 中国石油大学石油工程学院,山东,东营,257061 |
| |
| 基金项目： | 国家自然科学基金项目，高等学校博士学科点专项科研基金项目，中国石油化工集团公司科技攻关项目，中国石油大学(华东)研究生创新基金 |
| |
| 摘 要： | 首先分析声波在管柱中的传播机制和特性,接箍等效为声透层,依据突变截面管和波导管声波传播相关理论,利用传递矩阵法分析声波在钻柱中的透射和反射.对理想钻杆中沿管轴方向的纵波传播模型进行分析,推导出纵波频率方程.利用色散曲线对钻杆中纵波传输的频域特性进行分析,并通过有限长管试件进行声传输试验.结果表明:钻杆和接箍的长度和截而积决定了钻柱的频带结构,并且这种频带结构的变化旱周期性和对称性;在钻柱信道中,通带和阻带交替出现,钻柱表现为一种梳状滤波器,且在一个频带周期内随着频率的增加,通带先变窄冉变宽,阻带则先变宽再变窄;钻杆长度增加使通带变窄,接箍截面积减小使通带变宽,钻杆各节钻管的长度不一致会使通带变窄.
|
| 关 键 词： | 钻柱 周期性结构 声信号传输 通带 阻带 波数 群速度 |
Acoustic transmission properties in drill string |
| |
| ZHAO Guo-shan,GUAN Zhi-chuan,LIU Yong-wang.Acoustic transmission properties in drill string[J].Journal of China University of Petroleum,2010,34(1). |
| |
| Authors: | ZHAO Guo-shan GUAN Zhi-chuan LIU Yong-wang |
| |
| Institution: | ZHAO Guo-shan,GUAN Zhi-chuan,LIU Yong-wang(College of Petroleum Engineering in China University of Petroleum,Dongying 257061,China) |
| |
| Abstract: | Firstly,the transmission mechanics and characteristic of acoustic wave within pipe string were analyzed. Joints act as acoustically transparent layers. Based on the theories of abrupt changes in the cross-sectional area of a pipe and acoustic waveguide,transfer matrix method was used to analyze acoustic transmission and reflection within drill strings. Secondly,the frequency equation of longitudinal wave was developed based on the transmission model that longitudinal waves propagate along the periodic drill... |
| |
| Keywords: | drill string periodic structure acoustic signal transmission pass band stop band wave number group velocity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
