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1. 发明授权

US5586083A Turbo siren signal generator for measurement while drilling systems 失效
标题翻译：涡轮警号信号发生器，用于测量钻井系统
公开(公告)号：US5586083A
公开(公告)日：1996-12-17
申请号：US296109
申请日：1994-08-25
申请人： Wilson C. Chin , Thomas E. Ritter
发明人： Wilson C. Chin , Thomas E. Ritter
IPC分类号： E21B47/18 , C01V1/40
CPC分类号： E21B47/182 , E21B47/18 , Y10S367/911 , Y10S367/912
摘要： A self-propelled turbo siren modulator assembly is disclosed for use in an MWD system. The turbo siren includes a fixed turbine deflector located upstream from a rotor, which in turn is located upstream from a fixed stator. Drilling mud flowing through the turbine deflector causes the rotor to rotate independent of any external drive device. The rotor and stator preferably have a similar configuration, which includes at least one lobe and at least one port so that the rotor alternatively blocks or permits mud flow through the port(s) of the stator to create a cyclical acoustic wave signal, with a frequency that depends upon the number of lobes on the rotor and the velocity of the drilling mud. Encoded measurement data is modulated on the carrier frequency wave through the use of amplitude modulation, frequency modulation or phase shift modulation, or a combination thereof to maximize data rates. In addition, a plurality of modulator assemblies may be provided, each of which includes a different number of lobes so as to operate at different, distinct frequencies to create a plurality of transmission channels in the drilling mud medium. These plurality of modulator assemblies therefore provide a plurality of separate carrier frequency signals on which data may be modulated to increase the rate at which data is transmitted to the surface of the well.
摘要翻译：公开了一种用于MWD系统中的自推进式涡扇警报调制器组件。涡轮警报器包括位于转子上游的固定涡轮偏转器，转子又位于固定定子的上游。流经涡轮偏转器的钻井泥浆使转子独立于任何外部驱动装置旋转。转子和定子优选地具有类似的构造，其包括至少一个凸角和至少一个端口，使得转子交替地阻挡或允许泥浆流过定子的端口以产生循环声波信号，其中频率取决于转子上的叶片数量和钻井泥浆的速度。编码的测量数据通过使用幅度调制，频率调制或相移调制或其组合在载波频率波上进行调制，以最大化数据速率。此外，可以提供多个调制器组件，每个调制器组件包括不同数量的叶片，以便以不同的不同频率操作，以在钻井泥浆介质中产生多个传输通道。因此，这些多个调制器组件提供多个单独的载波频率信号，在该载波频率信号上可以调制数据以增加将数据传输到井的表面的速率。

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