井下信号功率放大方法的研究井下信号功率放大方法的研究  

Research on power amplification method of downhole signal

作　　者：杨飞[1] 

机构地区：[1]油气钻井技术国家重点工程实验室西安石油大学井下测控研究室,陕西西安710065

出　　处：《石油化工应用》2017年第12期106-109,118,共5页Petrochemical Industry Application

摘　　要：井下信号传输过程中需要将信号进行放大,钻井深度不断增加,地层温度、压力不断升高,单一集成电路的设计方案成本较高,当环境温度过高、需要信号功率过大时,单一集成电路的设计方案无法满足要求。本文通过对宽频带传输线的理论进行研究,采用双路功率信号进行合成,利用传输线变压器作为宽频带电路中的功率合成器。通过对比测试,在同一环境温度和输出功率相同的条件下,通过合成的方法能够输出更高的功率,输出效率比单路更高,经过实验测量计算,合成效率最好能够达到80%。因此,通过传输线变压器功率合成器的研究,为今后深度钻井中信号功率放大提出了一种有效的解决方案。In order to make the collected signal smoothly transmitted to the ground. A power amplifier is required to enhance the signal. When more power is needed, single-channel power amplifier is not meet the requirements in the underground high-temperature environment, so the use of power synthesis method is very necessary. In this paper, through the analysis of the electromagnetic characteristics of transmission line transformers and experiment analysis, use a transmission line transformer as a wideband circuit power synthesizer.Impedance matching is performed by experimental measurements, and the synthesis efficiency can reach 80 %. That is to say, transmission line transformers power synthesizers have a wider frequency band and higher synthesis efficiency. It is an efficient downhole power synthesis solution.

关 键 词：信号 功率放大 钻井 功率合成 

分 类 号：TE928[石油与天然气工程—石油机械设备] TN73[电子电信—电路与系统]