钻柱结构声传性能试验研究  

Experimental Study of the Sound Transmission Performance of Drillpipe Structure

作　　者：赵国山[1] 管志川[2] 王斌斌 都振川[1] 黄明泉[1] 

机构地区：[1]胜利石油管理局钻井工程技术公司 [2]中国石油大学(华东)石油工程学院 [3]胜利石油管理局钻井工艺研究院

出　　处：《石油机械》2013年第1期9-13,共5页China Petroleum Machinery

基　　金：国家自然科学基金面上项目"基于钻柱的声信号传输系统和声传播特性研究"(50974131);国家重点基础研究发展计划(973计划)项目"深井复杂地层安全高效钻井基础研究"的子课题6"深井复杂地层钻井设计平台与风险控制机制"(2010CB226706);高等学校博士学科点专项科研基金项目"钻柱中声的传播和衰减特性研究"(20090133110005);国家863计划主题项目"低压易漏地层钻井关键技术及装备"(2012AA091601)

摘　　要：采用瞬态分析方法对周期性结构钻柱进行分析,建立了钻柱信道声传输性能试验系统,用该试验系统研究激励信号频率和钻柱结构对声信号传播的影响,对接收信号的时域波形、幅值和频谱的变化规律进行分析。研究结果表明,声信号在传播过程中会衰减,衰减与传输距离和信号频率有关,并随着距离和频率的增大而加剧;为保证声波遥传,工作频率应小于1 kHz;钻柱几何结构、物理参数对传输性能影响很大,随着频率增大,信号幅值减小,信号波形失真程度加剧;钻杆连接处有杂质或连接不紧密会加剧信号失真程度,激振器与钻柱端面接触不紧密时将产生较大的杂波干扰,因此应使激振器与钻杆端面紧密接触,保证连接部位的清洁。The property of drillpipe communication channel as well as the transmission mechanism of acoustic wave was expounded. The transient analysis method was adopted to analyze the drillpipe with a periodical struc- ture. The experimental system of sound transmission performance of drillpipe channel was established. The system was used to study the effects of excitation signal frequency and drillpipe structure on sound signal transmission. An analysis of the law of variation concerning the time domain waveform, amplitude and frequency spectrum of receiv- ing signals was conducted. The research findings show that sound signals will attenuate in the process of transmis- sion. The attenuation is related to transmission distance and signal frequency and it will increase with the distance and frequency. To ensure the remote transmission of acoustic wave the operating frequency should be less than 1 kHz. The geometric structure and physical parameters of drillpipe have a remarkable effect on transmission perform- ance. With the increase of frequency the signal amplitude will decrease and the signal waveform distortion will in- crease. The impurities at the drillpipe connection or the loose connection will increase the signal distortion. The loose connection between exciter and drillpipe end face will produce remarkable clutter interference. Therefore, the close contact between exciter and drillpipe end face should be achieved in order to ensure the cleanness of the connecting Dart.

关 键 词：钻柱 信号传输 衰减 声波 瞬态分析 时域 频域 传输性能 

分 类 号：TE921[石油与天然气工程—石油机械设备]