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MEASUREMENT-WHILE-DRILLING MUD PULSE TELEMETRY REFLECTION CANCELATION

机译:测量时钻井泥浆脉冲遥测反射消除

摘要

Method and apparatus for optimizing mud pulse telemetry data rate by processing a sequence of measured pulses to minimize adverse effects of pressure pulse reflections, attenuations and distortions. A downhole telemetry unit cooperating with a sensor and disposed in a MWD or LWD logging tool generates a sequence of pulse within the mud column. The sequence is encoder to represent the response of the sensor disposed within the logging tool. The encoded pulse sequence is sensed at the surface of the earth using a pressure transducer. The output of the transducer yields an electrical signal that is typically attenuated and can contain reflections and distortions. This measured signal output is processed to minimize the effects of pulse reflections, attenuations and distortions thereby yielding a primary pulse sequence that is more representative of the response of the sensor and allowing an increase in mud pulse telemetry data rate.
机译:通过处理一系列测量脉冲来优化泥浆脉冲遥测数据速率以最小化压力脉冲反射,衰减和变形的不利影响的方法和设备。与传感器配合并布置在MWD或LWD测井仪中的井下遥测单元在泥浆柱内产生一系列脉冲。该序列是编码器,用于表示设置在测井工具内的传感器的响应。使用压力传感器在地球表面感测编码的脉冲序列。换能器的输出会产生电信号,该信号通常会被衰减并可能包含反射和失真。处理该测得的信号输出以最大程度地减少脉冲反射,衰减和失真的影响,从而产生一个初级脉冲序列,该序列更能代表传感器的响应,并可以增加泥浆脉冲遥测数据速率。

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