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1. 发明申请

WO2004051402A3 DATA RECOVERY FOR PULSE TELEMETRY USING PULSE POSITION MODULATION 审中-公开
标题翻译：使用脉冲位置调制的脉冲电视数据恢复
公开(公告)号：WO2004051402A3
公开(公告)日：2004-08-12
申请号：PCT/US0336470
申请日：2003-11-13
申请人： HALLIBURTON ENERGY SERV INC
发明人： MARSH LABAN M , SUN CILI , PILLAI BIPIN K , VIANA LEONARDO
IPC分类号： E21B47/18 , G08C19/16 , G08C19/20
CPC分类号： E21B47/18
摘要： The specification discloses algorithms for error recovery in pulse position modulation-based mud pulse telemetry as show in figure 1. The system uses a mud pump (22) to generate a flow of mud through a drill string (10) which is modulated. The signal processor (28) detects and processes the received mud pulses. The algorithm detects and attemps to correct for at least five possible error mechanisms: the missed detection of a pulse that creates an interval greater than maximum; the missed detection of a pulse that results in an interval still within acceptable boundaries; the detection of an extra pulse; a pulse shift that results in data in contiguous intervals being affected; and a pulse shift resulting in a single interval data corruption.
摘要翻译：该规范公开了用于基于脉冲位置调制的泥浆脉冲遥测中的误差恢复算法，如图1所示。该系统使用泥浆泵（22）通过经过调制的钻柱（10）产生泥浆流。信号处理器（28）检测并处理接收到的泥浆脉冲。该算法检测和调用以校正至少五种可能的错误机制：错误检测到产生大于最大值的间隔的脉冲; 错误检测导致间隔仍在可接受边界内的脉冲; 检测额外脉冲; 导致连续间隔中的数据受到影响的脉冲移位; 并且脉冲移位导致单个间隔数据损坏。

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