摘要
基于泥浆压力的随钻测量系统在钻井作业中,利用井下子系统实时测量钻头的方位和钻进状态,将数据以泥浆压力波形式传输回地面,由地面子系统进行信号解码。井下子系统采用小型发电机供电,与传统的电池供电相比,可以减少因更换电池导致的施工进度减缓。为适应井下的高温环境,设计了基于小型发电机的耐高温井下子系统。测试表明,该子系统可以在170℃的高温环境下,连续正常工作150 h。还设计了基于水循环的系统联合测试平台,可以完整测试系统的发电、稳压、信号编码、脉冲发送、信号检测和解码等流程。
In Measure-while-drilling(MWD) systems based on mud pressure telemetry, the down-hole subsystem measures real-time parameters such as inclination, azimuth, and tool face angles, and then it transmits the data in the form of mud pressure pulses up to the ground, where the ground subsystem decodes the information encoded in the pulses. To power the down-hole subsystem, a small-sized electrical generator is utilized, which eliminates the time due to battery-switching in the traditional battery-based powering scheme. To accommodate the need for high temperature down-hole applications, a high temperature-proof down-hole subsystem powered by small-sized electrical generator is designed and tested. Experiments show that the subsystem can work normally for 150 h under 170 ℃.A unified testing platform based on water circulation is also designed and built, which can conveniently test the whole workflow of the system: power generation, voltage regulation, pulse transmission, detection and decoding.
作者
张斌
蔡鹏飞
何正松
ZHANG Bini;CAI Pengfei;HE Zhengsong(College of Communication Engineering,Chengdu University of Information Technology,Chengdu 610225,China;Chengdu Well-Probes Technology Inc.,Chengdu 610041,China)
出处
《成都信息工程大学学报》
2019年第4期375-379,共5页
Journal of Chengdu University of Information Technology
基金
四川省教育厅重点资助项目(17ZA0074)
关键词
随钻测量:泥浆压力脉冲
发电机
耐高温
measurement while drilling
mud pressure pulse
generator
high temperature-proof
