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公开(公告)号：US06370082B1
公开(公告)日：2002-04-09
申请号：US09332641
申请日：1999-06-14
IPC分类号： G01V140
CPC分类号： E21B47/16
摘要： An acoustic telemetry system is disclosed that reduces any through-drillstring drilling noise which contaminates a through-drillstring telemetry signal. Normal filtering operations are provided to remove noise outside the frequency band of interest, and reference signal filtering operations are provided to reduce the in-band noise, thereby enhancing the telemetry system's data rate and reliability. In one embodiment, the acoustic telemetry system includes a transmitter and a receiver. The transmitter induces an acoustic information signal that propagates along the tubing string. Existing noise in the tubing string contaminates the information signal. The receiver is provided with sensors for measuring the corrupted information signal and a reference signal that is indicative of the noise present in the measured information signal. The receiver uses a filter to convert the reference signal into an estimate of the information signal corruption, and a summing element to subtract the estimate from the reference signal to produce an information signal with reduced corruption. In a preferred embodiment, the information signal is propagated in an axial transmission mode, and the noise in the torsional mode is used as the reference signal for reducing noise the information signal picks up in the axial mode.
摘要翻译： 公开了一种声学遥测系统，其减少了污染通过钻柱遥测信号的任何穿钻钻井噪声。 提供正常滤波操作以去除感兴趣频带外的噪声，并提供参考信号滤波操作以减少带内噪声，从而提高遥测系统的数据速率和可靠性。 在一个实施例中，声学遥测系统包括发射器和接收器。 发射器引起沿着管柱传播的声信息信号。 油管柱中的现有噪声会污染信息信号。 接收器设置有用于测量损坏的信息信号的传感器和指示所测量的信息信号中存在的噪声的参考信号。 接收机使用滤波器将参考信号转换为信息信号损坏的估计，以及相加元件，以从参考信号中减去估计，以产生具有减少的损坏的信息信号。 在优选实施例中，信息信号以轴向传播模式传播，并且扭转模式中的噪声被用作用于降低信息信号以轴向模式拾取的噪声的参考信号。
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公开(公告)号：US06400646B1
公开(公告)日：2002-06-04
申请号：US09457996
申请日：1999-12-09
申请人： Vimal V. Shah , John W. Minear , Robert Malloy , James R. Birchak , Wallace R. Gardner , Carl Robbins
发明人： Vimal V. Shah , John W. Minear , Robert Malloy , James R. Birchak , Wallace R. Gardner , Carl Robbins
IPC分类号： H04H900
摘要： A system is disclosed for synchronizing a clock in a well containing a drill string with a clock located near the surface of the well. The system includes devices for transmitting and receiving a pair of acoustic signals between locations associated with each clock and processing those signals. The system determines the time of arrival of each acoustic signal by analyzing the shape of a function of the acoustic signal chosen from a group of functions suitable to determine a clock offset with millisecond accuracy.
摘要翻译： 公开了一种用于使包含钻柱的井中的时钟与位于井的表面附近的时钟同步的系统。 该系统包括用于在与每个时钟相关联的位置之间发送和接收一对声信号并处理这些信号的装置。 系统通过分析从适合于以毫秒精度确定时钟偏移的一组函数中选择的声信号的函数的形状来确定每个声信号的到达时间。
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公开(公告)号：US6137747A
公开(公告)日：2000-10-24
申请号：US87220
申请日：1998-05-29
申请人： Vimal V. Shah , James R. Birchak , John W. Minear , Wallace R. Gardner , Donald Kyle , John R. Dennis , Kenny McConnell , George S. Reagan , Rebecca McConnell
发明人： Vimal V. Shah , James R. Birchak , John W. Minear , Wallace R. Gardner , Donald Kyle , John R. Dennis , Kenny McConnell , George S. Reagan , Rebecca McConnell
CPC分类号： G01V11/002 , B06B1/0611
摘要： The invention is an acoustic transmitter that imparts vibratory stresses onto a signal propagation medium such as oil well tubing when actuated by an electric driver. In one embodiment, the acoustic transmitter utilizes a mechanical driver that includes piezoelectric elements to generate the vibratory stresses. The acoustic transmitter is mechanically attached at only one point to the signal propagation medium. This single point attachment eliminates loading on the acoustic transmitter from compressive and tensile forces carried by the signal propagation medium. A mass backing the mechanical driver may be used to extend the frequency range over which the acoustic transmitter is operable. In addition, the resonance response of the acoustic transmitter may be minimized by the use of a viscous dampener. The viscous dampener is configured to "couple" with the mechanical driver when the acoustic transmitter is operating and to "uncouple" with the mechanical driver at other times.
摘要翻译： 本发明是一种在由电动驱动器致动时将振动应力施加到诸如油井管道之类的信号传播介质上的声发射器。 在一个实施例中，声发射器利用包括压电元件的机械驱动器来产生振动应力。 声发射机仅在一个点处机械连接到信号传播介质。 这种单点附件消除了声发射器上由信号传播介质承载的压缩和拉伸力的负担。 可以使用机械驱动器的质量来扩展声发射器可操作的频率范围。 此外，通过使用粘性阻尼器可以使声发射器的共振响应最小化。 粘性阻尼器被配置为当声发射器操作时与机械驱动器“耦合”，并且在其它时间与机械驱动器“脱离”。
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公开(公告)号：US07210555B2
公开(公告)日：2007-05-01
申请号：US10882915
申请日：2004-06-30
摘要： An acoustic attenuator includes a housing having an inner side surface which defines an interior chamber and at least one dampening member both physically and acoustically coupled to the housing and projecting into the interior chamber. Acoustic energy propagating within the housing is deflected into the dampening members for acoustically dispersal within the interior chamber. In various aspects thereof, the dampening members may include one or a group of two or more generally cylindrical sleeves having one end both physically and acoustically coupled to the housing and a second end projecting into the interior chamber. Preferably, when a group of two or more cylindrical sleeves are employed, the sleeves are nested within one another. The dampening members may further include a second, oppositely disposed, group of two or more acoustic attenuators nested within one another and interdigitated with the first group of cylindrical sleeves.
摘要翻译： 声衰减器包括壳体，该壳体具有限定内腔的内侧表面和至少一个阻尼构件，物理和声学耦合到壳体并突出到内腔中。 在壳体内传播的声能被偏转到阻尼构件中，用于在内腔内声扩散。 在其各个方面，阻尼构件可以包括一个或一组两个或更多个大致圆柱形的套筒，其中一个端部物理上和声学上耦合到壳体，第二端突出到内部腔室中。 优选地，当使用一组两个或更多个圆柱形套筒时，套筒彼此嵌套。 阻尼构件还可以包括彼此嵌套的两个或更多个声衰减器的第二相对设置的组，并与第一组圆柱形套筒相互指向。
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5.发明授权Methods and systems for transmitting and receiving a discrete multi-tone modulated signal in a fluid 有权用于在流体中发送和接收离散多色调调制信号的方法和系统公开(公告)号：US07187298B2
公开(公告)日：2007-03-06
申请号：US11035107
申请日：2005-01-13
申请人： Wallace R. Gardner , Vimal V. Shah
发明人： Wallace R. Gardner , Vimal V. Shah
IPC分类号： G01V3/00
CPC分类号： E21B47/182
摘要： Methods and systems for transmitting and receiving a discrete multi-tone (DMT) modulated signal in a fluid. Some illustrative embodiments may be a method comprising transforming an input data series into an information-carrying signal (the information-carrying signal carrying input data from the input data series as modulations of at least one of a plurality of evenly spaced frequency bins), and applying the information-carrying signal to a transducer that converts the information-carrying signal into pressure variations within a fluid.
摘要翻译： 用于在流体中发送和接收离散多音调（DMT）调制信号的方法和系统。 一些说明性实施例可以是一种方法，包括将输入数据序列变换为信息携带信号（从输入数据序列携带输入数据作为多个均匀间隔的频率仓中的至少一个的调制）的信息携带信号，以及 将信息携带信号应用于将信息携带信号转换成流体内的压力变化的换能器。
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公开(公告)号：US06909667B2
公开(公告)日：2005-06-21
申请号：US10075529
申请日：2002-02-13
CPC分类号： E21B47/122 , E21B47/16 , E21B47/18
摘要： The present disclosure provides several methods for selecting and transmitting information from downhole using more than one channel of communication wherein data streams transmitted up each communications channel are each independently interpretable without reference to data provided up the other of the communications channels. Preferred embodiments incorporate the use of a combination of at least two of mud-based telemetry, tubular-based telemetry, and electromagnetic telemetry to achieve improved results and take advantage of opportunities presented by the differences between the different channels of communication.
摘要翻译： 本公开提供了用于使用多于一个通信信道从井下选择和发送信息的几种方法，其中在每个通信信道上发送的数据流都可以独立地解释，而不参考另一个通信信道提供的数据。 优选实施例结合使用基于泥浆的遥测，基于管的遥测和电磁遥测中的至少两种的组合来实现改进的结果并且利用由不同通信通道之间的差异呈现的机会。
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7.发明授权High data rate acoustic telemetry system using multipulse block signaling with a minimum distance receiver 有权使用具有最小距离接收器的多脉冲块信令的高数据速率声学遥测系统公开(公告)号：US06583729B1
公开(公告)日：2003-06-24
申请号：US09507610
申请日：2000-02-21
申请人： Wallace R. Gardner , Vimal V. Shah , Donald Kyle
发明人： Wallace R. Gardner , Vimal V. Shah , Donald Kyle
IPC分类号： G01V300
CPC分类号： G01V11/002
摘要： A reliable downhole acoustic telemetry system with increased data rate is disclosed. In one embodiment, the telemetry system includes a receiver having an envelope-detection demodulator and a multipulse-block distance detector that compares a baseband envelope signal to stored waveforms and indicates for each symbol interval the multipulse block having the waveform closest to the baseband envelope signal. The receiver may also include a timing recovery module that models the baseband envelope signal for the detected multipulse blocks and determines a distance for early-sampling and late-sampling of the baseband envelope signal. The timing recovery module then provides a sampling clock that minimizes the average difference between the early- and late-sampling distances. The telemetry system may further include a transmitter having an encoder and a modulator. The encoder converts a data signal into a sequence of multipulse blocks having a settling interval between the blocks. The modulator modulates the multipulse block sequence with a carrier frequency to produce an amplitude modulated signal. The telemetry system may have the transmitter and receiver coupled to a tubing string by an acoustic signal generator and an acoustic transducer, respectively. The acoustic signal generator converts the amplitude modulated signal into acoustic waves that propagate along the tubing string to the acoustic transducer, which then converts the acoustic waves into a receive signal. The system and method disclosed may advantageously provide a robust, low-power telemetry system that communicates telemetry along a tubing string at a rate that is at least an order of magnitude greater than existing acoustic telemetry methods.
摘要翻译： 公开了一种具有增加的数据速率的可靠的井下声学遥测系统。 在一个实施例中，遥测系统包括具有包络检测解调器和多脉冲块距离检测器的接收机，其将基带包络信号与存储的波形进行比较，并且针对每个符号间隔指示具有最接近基带包络信号的波形的多脉冲块 。 接收机还可以包括定时恢复模块，其对所检测到的多脉冲块进行基带包络信号的建模，并确定基带包络信号的早期采样和后采样的距离。 定时恢复模块然后提供采样时钟，其使得早期和晚期采样距离之间的平均差异最小化。 遥测系统还可以包括具有编码器和调制器的发射机。 编码器将数据信号转换为在块之间具有建立间隔的多脉冲块序列。 调制器用载波频率调制多脉冲块序列以产生幅度调制信号。 遥测系统可以分别通过声信号发生器和声换能器将发射器和接收器耦合到油管柱。 声信号发生器将幅度调制信号转换成沿着管柱传播到声换能器的声波，声换能器然后将声波转换成接收信号。 所公开的系统和方法可以有利地提供鲁棒的低功率遥测系统，其以比现有的声学遥测方法大至少一个数量级的速率沿油管柱传送遥测。
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公开(公告)号：US08634273B2
公开(公告)日：2014-01-21
申请号：US12605979
申请日：2009-10-26
IPC分类号： E21B47/16
CPC分类号： G01V11/002 , E21B47/16
摘要： An embodiment includes a method comprising transmitting and receiving an acoustic signal that is modulated along a jointed tubing. The acoustic signal may be transmitted in multiple passbands of the jointed tubing and may be modulated differently in different passbands. A swept frequency signal may be used to determine transmission characteristics of the jointed tubing and to select the multiple passbands. Additional embodiments are disclosed.
摘要翻译： 一个实施例包括一种方法，包括发送和接收沿着接合管道调制的声信号。 声信号可以在连接管道的多个通带中传输，并且可以在不同的通带中被不同地调制。 可以使用扫频信号来确定连接管道的传输特性并选择多个通带。 公开了另外的实施例。
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公开(公告)号：US07468678B2
公开(公告)日：2008-12-23
申请号：US11560079
申请日：2006-11-15
申请人： Vimal V. Shah , Wallace R Gardner
发明人： Vimal V. Shah , Wallace R Gardner
IPC分类号： G01V3/00
CPC分类号： E21B47/122 , E21B47/12 , G01V11/002
摘要： A communications system employing discrete multi-tone (“DMT”) modulated signals on a communications channel formed by inductively-coupled pipe. In one embodiment, the communications system includes a string of wired pipe joints that couple a transmitter to a receiver. Each pipe joint in the string possesses threaded ends configured for mechanically connecting with other pipe joints, a electrical or inductive coupler at each threaded end, and an insulated conductor that electrically connects the couplers. The transmitter and receiver communicate via DMT modulated signals transported by the wired pipe string. The system may further include multiple repeaters in the string. Each repeater may be configured to receive a DMT-modulated signal, to recover information from the DMT-modulated signal, and to retransmit the information in the form of a DMT-modulated signal.
摘要翻译： 一种在由电感耦合管形成的通信信道上采用离散多音（“DMT”）调制信号的通信系统。 在一个实施例中，通信系统包括将发射机耦合到接收器的一串有线管接头。 弦中的每个管接头具有构造成与其他管接头机械连接的螺纹端，每个螺纹端处的电感或耦合器，以及电连接耦合器的绝缘导体。 发射机和接收机通过由有线管道传输的DMT调制信号进行通信。 该系统还可以包括串中的多个中继器。 每个中继器可以被配置为接收DMT调制信号，以从DMT调制信号中恢复信息，并以DMT调制信号的形式重发信息。
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公开(公告)号：US06880634B2
公开(公告)日：2005-04-19
申请号：US10308610
申请日：2002-12-03
摘要： System, apparatus, and method of telemetering downhole sensor information to the surface while operations are performed in an oil or gas well using coiled tubing. Data are transmitted on coiled tubing as digital signals encoded in acoustic signals. In one implementation, a stripper packer through which coiled tubing is moved into a well is operated between at least a first state and a second state; and an acoustic communication device responds to operation of the stripper packer such that when the stripper packer is in the first state, the acoustic communication device is decoupled from acoustic communication with the coiled tubing, but when the stripper packer is in the second state, the acoustic communication device is coupled for acoustic communication with the coiled tubing.
摘要翻译： 在使用连续油管在油井或气井中进行操作时，将井下传感器信息遥测到地面的系统，设备和方法。 数据在连续油管上传输，作为以声信号编码的数字信号。 在一个实施方案中，通过其将连续油管移动到井中的汽提器封隔器在至少第一状态和第二状态之间运行; 并且声学通信装置响应于汽提器封隔器的操作，使得当剥离器封隔器处于第一状态时，声学通信装置与连续管道的声学连通解耦，但是当汽提隔板封隔器处于第二状态时， 声学通信装置被耦合用于与连续油管的声学通信。
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