【摘要】 介绍了泥浆脉冲随钻测量系统信号传输的3种基本工作方式:压力正脉冲、压力负脉冲和连续压力波。泥浆脉冲信号在传输过程中主要受钻探泵、井底动力机、泥浆中的气泡及活动钻具的干扰;钻井深度、泥浆中的气泡量、含砂量和泥浆类型对信号衰减有一定的影响。更多还原

【Abstract】 The paper introduces three basic working styles of signal transmission of mud pulse MWD sys tern,pressure positive pulse, pressure negative pulse and continuous pressure wave. In the course of transmission, mud pulse signal mainly disturbed by drilling pump,engine in the bottom hole, air bladder contained in mud and movement of drilling equipment. Also air bladder and sand contained in mud,type of mud affect attenuation of mud pulse signal.更多还原