弯曲钻柱中声传播特性教学实验装置研制  

Development of teaching experimental device with acoustic propagation characteristics in curved drill string

作　　者：刘永旺[1] 管志川[1] 王庆[1] 樊滔 张波[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《实验技术与管理》2016年第10期93-98,共6页Experimental Technology and Management

基　　金：国家自然科学基金青年科学基金项目(51404285);国家高技术研究发展计划(863计划)主题项目(2012AA091601);中国博士后科学基金面上资助项目(2014M551985)

摘　　要：建立了用于测试声波在钻柱信道中传输及衰减特性的教学实验装置,基于该装置对钻柱弯曲状态对钻柱中声传播的影响规律进行了实验研究及分析。研究结果表明:声波在钻柱中传播时存在的交替排列通阻带随着钻柱弯曲程度变化而发生变化,钻柱弯曲时,通带宽度基本不变,通带声波幅值加强,通带后移,随着弯曲程度的增加,上述趋势更加明显;随发射声波频率的增加,通带后移幅度增大;声波激励电压、脉冲宽度及速率对钻柱弯曲后传输性能变化影响较小,基本可以忽略。井下随钻信息声传输方法的开发与实现要充分考虑井眼内钻柱状态的影响。An equipment is erected to test acoustic wave propagation and attenuation properties in drilling string channel. This paper uses this equipment to study and analyze the impact of drilling string bend on acoustic propagation property, The results indicate that the pass band and attenuation hand exist alternatively and change as drilling string bend changes when acoustic wave propagates in drilling string; the breadth of pass band keeps stable while amplitude strengthens; Meanwhile the pass band moves backforword and the above trend becomes more obvious as bending degree increases; the backing extent of pass band increases as transmission frequency enhances; acoustic wave stimulating voltage, impluse breadth and velocity have little impact on propagation property after drilling string is bending. This impact can be ignored basically. It it necessary and important for development and realization of while-drilling downhole infornation acoustic transfer technology to consider the drilling string condition in wellbore.

关 键 词：实验装置 弯曲钻柱 声信号 传播规律 

分 类 号：TE927[石油与天然气工程—石油机械设备]