会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Method and apparatus to train telemetry system for optimal
communications with downhole equipment
    • 遥测系统与井下设备最佳通信的方法和装置
    • US5473321A
    • 1995-12-05
    • US213166
    • 1994-03-15
    • Kenneth R. GoodmanRobert D. Puckett
    • Kenneth R. GoodmanRobert D. Puckett
    • E21B47/12G01V1/00
    • E21B47/12
    • A telemetry system employs a periodic pseudorandom training sequence to effectively initialize an adaptive digital FIR filter-equalizer for optimal communications between a surface modem and downhole measuring equipment, without requiring any changes to the normal logging configuration or any special operator intervention. In a "training mode", an electronic source in a downhole sonde transmits a predetermined training sequence to a surface modem via a cable. The source preferably transmits the training sequence continuously until the surface modem has acclimated itself to the characteristics of the multiconductor cable by adaptively configuring the filter-equalizer, thereby enabling the surface modem to accurately interpret data received from the sonde despite attenuation, noise, or other distortion on the cable. The filter-equalizer adjusts itself in response to an error signal generated by comparing the filter-equalizer's output with a similar training sequence provided by a training generator. After the surface modem is trained, the system operates in an "operational mode," in which the sonde transmits data corresponding to downhole measurements, and the filter-equalizer's error signal is generated by comparing the filter-equalizer's output to a sliced version of the filter-equalizer's output. In this mode, the filter-equalizer continually adjusts itself to most accurately receive and interpret the data.
    • 遥测系统采用周期性伪随机训练序列来有效地初始化自适应数字FIR滤波器均衡器,用于表面调制解调器和井下测量设备之间的最佳通信,而不需要对正常记录配置或任何特殊的操作员干预进行任何改变。 在“训练模式”中,井下探头中的电子源通过电缆将预定的训练序列传送到表面调制解调器。 源优选地连续地发射训练序列,直到表面调制解调器通过自适应地配置滤波器均衡器而适应于多导体电缆的特性,从而使得表面调制解调器能够准确地解释从探头接收的数据,尽管衰减,噪声或其它 电缆失真。 滤波器均衡器响应于通过将滤波器均衡器的输出与训练发生器提供的类似训练序列进行比较而产生的误差信号进行调整。 在表面调制解调器被训练之后,系统以“操作模式”工作,其中探头发送对应于井下测量的数据,并且滤波器均衡器的误差信号通过将滤波器均衡器的输出与切片版本的 滤波均衡器的输出。 在这种模式下,滤波器均衡器会自动调整以最准确地接收和解释数据。
    • 4. 发明授权
    • Adaptive telemetry system for hostile environment well logging
    • 用于敌对环境测井的自适应遥测系统
    • US5365229A
    • 1994-11-15
    • US216504
    • 1994-03-22
    • Wallace R. GardnerKenneth R. Goodman
    • Wallace R. GardnerKenneth R. Goodman
    • E21B47/12G01V1/22G01V1/00
    • G01V1/22E21B47/12
    • The operation of hostile environment logging tools at temperatures up to 250.degree. C. stresses not only the tools, it also places severe demands upon the wireline telemetry due to the wide variations in the logging cable transmission characteristics. A robust adaptive wireline telemetry system for use in hostile environments has been developed that combines sophisticated digital communication methods with modern Digital-Signal-Processing (DSP) techniques. The downhole telemetry transmitter outputs a multilevel signal. The uphole receiver includes an adaptive transversal-filter equalizer (TFE) that is continually optimized to correct for changing signal distortion. The system operates robustly at high data rates over the temperature range of 0.degree. to 250.degree. C.
    • 敌对环境测井工具在高达250°C的温度下的操作不仅强调了工具,而且由于测井电缆传输特性的广泛变化,它也对有线遥测提出了严格的要求。 已经开发出一种用于敌对环境的强大的自适应有线遥测系统,其将复杂的数字通信方法与现代数字信号处理(DSP)技术相结合。 井下遥测发射机输出多电平信号。 井上接收机包括一个自适应横向滤波均衡器(TFE),其被不断地优化以校正变化的信号失真。 该系统在0°至250°C的温度范围内,以高数据速率运行稳定。