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1.发明授权Downhole telemetry system having discrete multi-tone modulation with QAM fallback 有权具有QAM回退的离散多音调制的井下遥测系统公开(公告)号：US07443312B2
公开(公告)日：2008-10-28
申请号：US10863131
申请日：2004-06-08
IPC分类号： G01V3/00
CPC分类号： H04L27/0008 , E21B47/12 , G01V11/002 , H04L1/0003 , H04L25/0202 , H04L25/03006 , H04L27/2601
摘要： Improved communication systems and methods are disclosed. In one embodiment, a downhole communications system comprises a downhole transceiver and a surface transceiver. The surface transceiver receives a discrete multi-tone (DMT) modulated uplink signal from the downhole transceiver, and transmits a downlink signal to the downhole transceiver using a modulation method determined by the transceivers as communications are initiated. The downlink modulation methods supported by the surface transceiver may include DMT modulation and quadrature amplitude modulation (QAM). The modulation mode selection may be based on measured channel characteristics, on proposed data rates, or on other predetermined parameters. The uplink and downlink signals may be communicated over a shared transmission mode on multiconductor cable or wired pipe, and alternatively the uplink and downlink signals may be communicated over separate transmission modes.
摘要翻译： 公开了改进的通信系统和方法。 在一个实施例中，井下通信系统包括井下收发器和表面收发器。 表面收发器从井下收发器接收离散的多音调（DMT）调制上行链路信号，并在通信发起时，使用由收发器确定的调制方法将下行链路信号发送到井下收发信机。 由表面收发器支持的下行链路调制方法可以包括DMT调制和正交幅度调制（QAM）。 调制模式选择可以基于测量的信道特性，所提出的数据速率或其他预定参数。 上行链路和下行链路信号可以在多导体电缆或有线管道上通过共享传输模式进行通信，并且可替代地，上行链路和下行链路信号可以通过分开的传输模式进行通信。
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2.发明授权公开(公告)号：US06657551B2
公开(公告)日：2003-12-02
申请号：US09775093
申请日：2001-02-01
IPC分类号： G01V300
CPC分类号： G01V11/002
摘要： A downhole telemetry system having discrete multi-tone modulation and dynamic bandwidth allocation is disclosed herein. In one embodiment, the downhole telemetry system comprises a surface transceiver, a cable, and a downhole transceiver coupled to the surface transceiver via the cable. The downhole transceiver communicates to the surface transceiver using discrete multi-tone (DMT) modulation to transmit telemetry information over a set of frequency subchannels allocated for uplink communications. The surface transceiver may likewise communicate to the downhole transceiver using DMT modulation to transmit information over a set of frequency subchannels allocated for downlink communications. The number of uplink and downlink communications subchannels is preferably variable and preferably can be changed depending on the operating mode of the system. This allows additional subchannels to be allocated for downlink communications during programming and configuration of the downhole equipment, and additional subchannels to be allocated for uplink communications during normal logging operations. The set of uplink communications subchannels may be disjoint from the set of downlink communications subchannels, and the sets may be spaced apart in frequency or interleaved in frequency. The cable may be a single conductor or multi-conductor logging cable. In the case of the multi-conductor logging cable, one of several possible orthogonal transmission modes may be used to convey the information signals.
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3.发明授权Downhole telemetry system using multiple uplink modes as data channels using discrete multi-tone modulation 有权使用多个上行链路模式的井下遥测系统作为使用离散多音调制的数据信道公开(公告)号：US07132958B2
公开(公告)日：2006-11-07
申请号：US10424475
申请日：2003-04-28
申请人： Carl Dodge , Wallace R. Gardner
发明人： Carl Dodge , Wallace R. Gardner
CPC分类号： E21B47/12 , G01V11/002
摘要： A method and a downhole telemetry system a downhole telemetry system using discrete multitone modulation for transmitting a data stream over a plurality of transmission modes is provided. The downhole telemetry system includes a downhole transmitter, a cable, and a surface receiver. The downhole transmitter is configured to transmit the data stream over the plurality of transmission modes. The surface receiver is coupled to the downhole transmitter via the cable and is configured to combine signals from each of the plurality of transmission modes to obtain the data stream transmitted by the downhole receiver. The method includes receiving a plurality of signals over the plurality of transmission modes from a downhole package, and may further include combining the plurality of signals to form at least one data stream.
摘要翻译： 一种方法和井下遥测系统，提供一种使用离散多音调制的井下遥测系统，用于通过多种传输模式传输数据流。 井底遥测系统包括井下发射器，电缆和表面接收器。 井下发射器被配置为通过多个传输模式发送数据流。 表面接收器经由电缆耦合到井下发射机，并且被配置为组合来自多个传输模式中的每一个的信号以获得由井下接收器发送的数据流。 该方法包括从井下包装在多个传输模式上接收多个信号，并且还可以包括组合多个信号以形成至少一个数据流。
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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：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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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：US06320820B1
公开(公告)日：2001-11-20
申请号：US09400357
申请日：1999-09-20
申请人： Wallace R. Gardner , Vimal V. Shah
发明人： Wallace R. Gardner , Vimal V. Shah
IPC分类号： H04H900
CPC分类号： E21B47/16
摘要： A reliable, high data rate, downhole acoustic telemetry system is disclosed. In one embodiment, the acoustic telemetry system includes a tubing string with an acoustic transmitter and an acoustic receiver mounted on it. The acoustic transmitter transmits telemetry information by modulating an acoustic carrier frequency that propagates along the walls of the tubing string. The transmitter is preferably mounted at a selected position relative to the end of the tubing string. The selected position is preferably less than &lgr;/4 from the end or approximately n&lgr;/2 from the end, where &lgr; is the wavelength of the carrier frequency in the tubing string, and n is a positive integer. In a more preferred embodiment, n may be the lesser of 4 times the number of cycles in the modulating toneburst and 40. The receiver is preferably mounted at approximately (2n−1)&lgr;/4 relative to the end of the tubing string, where n is a positive integer. Such positioning prevents reflections of the acoustic signal from significantly degrading the received signal. The acoustic signaling advantageously employs pulse shaping to further improve system performance. To enhance data transmission rates, the acoustic receiver advantageously includes an equalizer that compensates for signal dispersion and intersymbol interference while simultaneously minimizing other forms of signal corruption such as additive noise and channel nonlinearities. The equalizer is preferably an adaptive, nonlinear equalizer that may also be fractionally spaced. Such equalizers eliminate any requirements for spacing intervals which allow signal reflections to die out. The resulting system is capable of higher data rates. When error correction codes are employed, no reliability losses are incurred.
摘要翻译： 公开了一种可靠，高数据速率的井下声学遥测系统。 在一个实施例中，声学遥测系统包括具有声发射器的管柱和安装在其上的声学接收器。 声发射器通过调制沿着管柱的壁传播的声载波频率来发射遥测信息。 变送器优选地安装在相对于油管柱的端部的选定位置处。 所选择的位置优选地从末端小于lambd / 4或从末端起大约nlambd / 2，其中lambd是油管柱中载波频率的波长，n是正整数。 在更优选的实施例中，n可以是调制色调峰值和40中循环次数的4倍中的较小值。接收器优选地相对于管柱的端部以大约（2n-1）lambd / 4安装，其中 n是正整数。 这种定位防止声信号的反射显着地降低接收的信号。 声信号有利地采用脉冲整形来进一步提高系统性能。 为了增强数据传输速率，声接收机有利地包括补偿信号色散和符号间干扰的均衡器，同时最小化诸如加性噪声和信道非线性的其它形式的信号损坏。 均衡器优选地是也可以是分数间隔的自适应非线性均衡器。 这种均衡器消除了允许信号反射消失的间隔间隔的任何要求。 所得到的系统能够获得更高的数据速率。 当采用纠错码时，不会产生可靠性损失。
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8.发明授权Method to transmit downhole video up standard wireline cable using digital data compression techniques 失效使用数字数据压缩技术传输井下视频标准有线电缆的方法公开(公告)号：US06229453B1
公开(公告)日：2001-05-08
申请号：US09013373
申请日：1998-01-26
IPC分类号： G01V300
摘要： Disclosed is a downhole video system that is suitable for use with a standard wireline transmission line, without the need for coaxial or fiber optic cable. A downhole video camera transmits a digitized video signal that may be multiplexed with orientation, sound, and other telemetry data. At the surface, an enhanced video is displayed simultaneously with processed sound to give an operator a better understanding of the conditions downhole. In addition, multiple modes are provided, including a “burst” mode to provide high resolution, full motion video, thereby circumventing the severe bandwidth limitations of standard electrical transmission lines.
摘要翻译： 公开了一种适合与标准有线传输线一起使用的井下视频系统，而不需要同轴或光纤电缆。 井下摄像机发送可与定向，声音和其他遥测数据多路复用的数字化视频信号。 在表面上，与处理的声音同时显示增强的视频，以使操作者更好地了解井下的状况。 此外，还提供了多种模式，包括提供高分辨率，全动态视频的“突发”模式，从而避免了标准电力传输线的严重带宽限制。
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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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10.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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