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1. 发明申请

WO2004109926A1 METHOD AND SYSTEM FOR DOWNHOLE CLOCK 审中-公开
标题翻译：井下时钟方法与系统
公开(公告)号：WO2004109926A1
公开(公告)日：2004-12-16
申请号：PCT/US2004/009117
申请日：2004-03-26
申请人： HALLIBURTON ENERGY SERVICES, INC. , VARSAMIS, Georgios, L. , ALTHOFF, Gary, D. , SCHMITT, Denis, P. , ARIAN, Abbas , DUDLEY, James, H.
发明人： VARSAMIS, Georgios, L. , ALTHOFF, Gary, D. , SCHMITT, Denis, P. , ARIAN, Abbas , DUDLEY, James, H.
IPC分类号： H03L1/00
CPC分类号： E21B47/011 , H03L1/02
摘要： A downhole crystal-based clock that is substantially insensitive to the factors that cause frequency deviation. The clock may be maintained at a predetermined temperature using a temperature sensing device and a heating device where the predetermined temperature corresponds to the temperature at which the crystal experiences only slight frequency deviation as a function of temperature. A microprocessor may monitor the clock and compensate for long-term aging effects of the crystal according to a predetermined algorithm. The predetermined algorithm may represent long-term aging effects of the crystal which were derived by comparing the crystal clock to a more accurate clock (e.g., an atomic clock) prior to placing the clock downhole. In this manner, the crystal-based clock may be substantially free from the factors that cause frequency, and therefore time variations.
摘要翻译：基于井下晶体的时钟，对引起频率偏差的因素基本不敏感。可以使用温度感测装置和加热装置将时钟保持在预定温度，其中预定温度对应于晶体仅作为温度的函数的轻微频率偏差的温度。微处理器可以监视时钟并根据预定算法补偿晶体的长期老化效应。预定算法可以表示通过在将时钟放置在井下之前将晶体时钟与更准确的时钟（例如，原子钟）进行比较而导出的晶体的长期老化效应。以这种方式，基于晶体的时钟可以基本上没有引起频率的因素，并且因此也是时间变化的因素。

2. 发明申请

WO2003060559A3 ACOUSTIC LOGGING TOOL HAVING PROGRAMMABLE SOURCE WAVEFORMS 审中-公开
公开(公告)号：WO2003060559A3
公开(公告)日：2003-07-24
申请号：PCT/US2002/040756
申请日：2002-12-20
申请人： HALLIBURTON ENERGY SERVICES, INC.
发明人： WISNIEWSKI, Laurence, T. , VARSAMIS, Georgios, L. , MANDAL, Batakrishna
IPC分类号： G01V1/40
摘要： An acoustic tool (24) that provides a programmable source waveform is disclosed. Acoustic logs at multiple frequencies may be acquired at a single pass. The waveform may be frequency-adapted to maximize formation response and amplitude-adapted for gain control. The tool comprises: a controller (130), a digital-to-analog controller (128), an acoustic transducer (44), and a linear driver. The digital-to-analog controller converts a digital waveform from the controller into an analog waveform. The acoustic transducer converts an electrical signal into an acoustic signal. The linear driver receives the analog waveform from the digital-to-analog controller and responsively provides the electrical signal to the acoustic transducer.

3. 发明申请

WO2003060559A2 ACOUSTIC LOGGING TOOL HAVING PROGRAMMABLE SOURCE WAVEFORMS 审中-公开
标题翻译：具有可编程源波形的声学记录工具
公开(公告)号：WO2003060559A2
公开(公告)日：2003-07-24
申请号：PCT/US2002/040756
申请日：2002-12-20
申请人： HALLIBURTON ENERGY SERVICES, INC.
发明人： WISNIEWSKI, Laurence, T. , VARSAMIS, Georgios, L. , MANDAL, Batakrishna
IPC分类号： G01V
CPC分类号： G01V1/52 , G01V1/44 , H04R3/04
摘要： An acoustic tool that provides a programmable source waveform is disclosed. Numerous advantages may be achieved from the configurability of the source waveform. Notably, acoustic logs at multiple frequencies may be acquired with a single pass. The waveform may be frequency-adapted to maximize formation response and amplitude adapted for gain control. In one embodiment, the acoustic tool comprises: a controller, a digital-to-analog controller (DAC), an acoustic transducer, and a linear driver. The DAC converts a digital waveform from the controller into an analog waveform. The acoustic transducer converts an electrical signal into an acoustic signal. The linear driver receives the analog waveform from the DAC and responsively provides the electrical signal to the acoustic transducer. The electrical signal is proportional to the analog waveform. The tool may further include a memory for storing the digital waveform and/or software for generating the digital waveform.
摘要翻译：公开了一种提供可编程源波形的声学工具。可以从源波形的可配置性获得许多优点。值得注意的是，可以通过单次通过获得多个频率的声学记录。波形可以是频率适应的，以最大化形成响应和适于增益控制的幅度。在一个实施例中，声学工具包括：控制器，数模转换器（DAC），声换能器和线性驱动器。 DAC将数字波形从控制器转换为模拟波形。声换能器将电信号转换成声信号。线性驱动器从DAC接收模拟波形，并响应于将电信号提供给声学换能器。电信号与模拟波形成正比。该工具还可以包括用于存储用于产生数字波形的数字波形和/或软件的存储器。

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