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    • 6. 发明申请
      US20100123506A1 MULTISTAGE LEVEL TRANSLATOR 审中-公开
    • MULTISTAGE LEVEL TRANSLATOR
    • US20100123506A1
    • 2010-05-20
    • US12275109
    • 2008-11-20
    • Cung Vu , Dung Tran
    • Cung Vu , Dung Tran
    • H03L5/00
    • H03F3/45183 , H03F2203/45248 , H03F2203/45644
    • Multistage signal amplification, including level translation, improves signal integrity, e.g., slew rate, complementary signal delay and duty cycle performance, by mirroring complementary output current in an output stage based on a signal developed in an input stage pull-up network. A multistage amplifier may comprise a first stage comprising a differential input circuit coupled, respectively, between first and second inputs and first and second nodes, wherein the first node is coupled to a first pull-up circuit controlled by the first node and the second node is coupled to a second pull-up circuit controlled by the second node; and a second stage comprising a complementary output circuit coupled, respectively, between first and second nodes and first and second outputs, wherein a current mirror sinks essentially the same current at the first output as is sourced at the second output and vice versa. The pull-up network may further comprise a cross-coupled pull-up circuit.
    • 基于在输入级上拉网络中产生的信号，通过在输出级中镜像互补输出电流，包括电平转换的多级信号放大提高了信号完整性，例如压摆率，互补信号延迟和占空比性能。 多级放大器可以包括第一级，其包括分别耦合在第一和第二输入与第一和第二节点之间的差分输入电路，其中第一节点耦合到由第一节点和第二节点控制的第一上拉电路 耦合到由第二节点控制的第二上拉电路; 以及第二级，包括分别耦合在第一和第二节点之间的互补输出电路以及第一和第二输出，其中电流镜在第一输出处基本上吸收与在第二输出端源相同的电流，反之亦然。 上拉网络还可以包括交叉耦合上拉电路。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 8. 发明授权
      US08289808B2 System and method to estimate compressional to shear velocity (VP/VS) ratio in a region remote from a borehole 有权
    • System and method to estimate compressional to shear velocity (VP/VS) ratio in a region remote from a borehole
    • 估计远离钻孔的区域的压缩剪切速度（VP / VS）比的系统和方法
    • US08289808B2
    • 2012-10-16
    • US12463796
    • 2009-05-11
    • Cung Vu , Kurt T. Nihei , Denis P. Schmitt , Christopher Skelt , Paul A. Johnson , Robert Guyer , James A. TenCate , Pierre-Yves Le Bas
    • Cung Vu , Kurt T. Nihei , Denis P. Schmitt , Christopher Skelt , Paul A. Johnson , Robert Guyer , James A. TenCate , Pierre-Yves Le Bas
    • G01V1/00
    • G01V1/44 , G01V1/006 , G01V2210/125 , G01V2210/127 , G01V2210/588
    • In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a conveyed logging tool is disclosed. In some aspects, the method includes arranging a first source in the borehole and generating a steered beam of elastic energy at a first frequency; arranging a second source in the borehole and generating a steerable beam of elastic energy at a second frequency, such that the steerable beam at the first frequency and the steerable beam at the second frequency intercept at a location away from the borehole; receiving at the borehole by a sensor a third elastic wave, created by a three wave mixing process, with a frequency equal to a difference between the first and second frequencies and a direction of propagation towards the borehole; determining a location of a three wave mixing region based on the arrangement of the first and second sources and on properties of the third wave signal; and creating three-dimensional images of the non-linear properties using data recorded by repeating the generating, receiving and determining at a plurality of azimuths, inclinations and longitudinal locations within the borehole. The method is additionally used to generate three dimensional images of the ratio of compressional to shear acoustic velocity of the same volume surrounding the borehole.
    • 在本公开的一些方面，公开了一种用于使用输送的测井工具在远离钻孔的区域中创建非线性特性的三维图像和压缩剪切速度比的方法。 在一些方面，该方法包括在钻孔中布置第一源并且以第一频率产生具有弹性能的转向束; 在钻孔中布置第二源，并在第二频率处产生可转向的弹性能量束，使得在第一频率处的可转向波束和第二频率处的可操纵波束在远离钻孔的位置处截取; 在钻孔处由传感器接收由三波混合过程产生的第三弹性波，其频率等于第一和第二频率之间的差异以及朝向钻孔传播的方向; 基于第一和第二源的布置以及第三波信号的特性来确定三波混频区域的位置; 以及使用通过重复生成，接收和确定钻孔内的多个方位角，倾斜度和纵向位置而记录的数据来创建非线性性质的三维图像。 该方法另外用于产生围绕钻孔的相同体积的压缩与剪切声速之比的三维图像。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 9. 发明授权
      US08116167B2 Method and system for generating a beam of acoustic energy from a borehole, and applications thereof 有权
    • Method and system for generating a beam of acoustic energy from a borehole, and applications thereof
    • 用于从钻孔产生声能束的方法和系统及其应用
    • US08116167B2
    • 2012-02-14
    • US12137980
    • 2008-06-12
    • Paul A. Johnson , James A. Ten Cate , Robert Guyer , Pierre-Yves Le Bas , Cung Vu , Kurt Nihei , Denis P. Schmitt , Christopher Skelt
    • Paul A. Johnson , James A. Ten Cate , Robert Guyer , Pierre-Yves Le Bas , Cung Vu , Kurt Nihei , Denis P. Schmitt , Christopher Skelt
    • G01V1/50 , G01V1/44
    • G01V1/46
    • A compact array of transducers is employed as a downhole instrument for acoustic investigation of the surrounding rock formation. The array is operable to generate simultaneously a first acoustic beam signal at a first frequency and a second acoustic beam signal at a second frequency different than the first frequency. These two signals can be oriented through an azimuthal rotation of the array and an inclination rotation using control of the relative phases of the signals from the transmitter elements or electromechanical linkage. Due to the non-linearity of the formation, the first and the second acoustic beam signal mix into the rock formation where they combine into a collimated third signal that propagates in the formation along the same direction than the first and second signals and has a frequency equal to the difference of the first and the second acoustic signals. The third signal is received either within the same borehole, after reflection, or another borehole, after transmission, and analyzed to determine information about rock formation. Recording of the third signal generated along several azimuthal and inclination directions also provides 3D images of the formation, information about 3D distribution of rock formation and fluid properties and an indication of the dynamic acoustic non-linearity of the formation.
    • 传感器的紧凑阵列被用作井下仪器，用于对周围岩层进行声学研究。 阵列可操作以同时产生第一频率处的第一声波束信号和以与第一频率不同的第二频率的第二声束信号。 这两个信号可以通过阵列的方位角旋转定向，并且通过使用来自发射器元件或机电连杆的信号的相对相位的控制来定位倾斜旋转。 由于形成的非线性，第一和第二声束信号混合到岩层中，在那里它们组合成沿着与第一和第二信号相同的方向在地层中传播的准直的第三信号，并且具有频率 等于第一和第二声信号的差。 第三个信号在相同的钻孔，反射后或另一个钻孔中，在传输之后被接收并且被分析以确定关于岩层的信息。 沿着几个方位和倾斜方向产生的第三信号的记录还提供了地层的3D图像，关于岩层的3D分布和流体性质的信息以及地层的动态声学非线性的指示。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 10. 发明申请
      US20100265795A1 SYSTEM AND METHOD TO CREATE THREE-DIMENSIONAL IMAGES OF NON-LINEAR ACOUSTIC PROPERTIES IN A REGION REMOTE FROM A BOREHOLE 有权
    • SYSTEM AND METHOD TO CREATE THREE-DIMENSIONAL IMAGES OF NON-LINEAR ACOUSTIC PROPERTIES IN A REGION REMOTE FROM A BOREHOLE
    • 系统和方法创建一个距离一个地层的一个地区的非线性声学特性的三维图像
    • US20100265795A1
    • 2010-10-21
    • US12463802
    • 2009-05-11
    • Paul A. Johnson , Cung Vu , James A. TenCate , Robert Guyer , Pierre-Yves Le Bas , Kurt T. Nihei , Denis P. Schmitt , Christopher Skelt
    • Paul A. Johnson , Cung Vu , James A. TenCate , Robert Guyer , Pierre-Yves Le Bas , Kurt T. Nihei , Denis P. Schmitt , Christopher Skelt
    • G01V1/48
    • G01V1/44 , G01V1/006 , G01V2210/125 , G01V2210/127 , G01V2210/588
    • In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a conveyed logging tool is disclosed. In some aspects, the method includes arranging a first source in the borehole and generating a steered beam of elastic energy at a first frequency; arranging a second source in the borehole and generating a steerable beam of elastic energy at a second frequency, such that the steerable beam at the first frequency and the steerable beam at the second frequency intercept at a location away from the borehole; receiving at the borehole by a sensor a third elastic wave, created by a three wave mixing process, with a frequency equal to a difference between the first and second frequencies and a direction of propagation towards the borehole; determining a location of a three wave mixing region based on the arrangement of the first and second sources and on properties of the third wave signal; and creating three-dimensional images of the non-linear properties using data recorded by repeating the generating, receiving and determining at a plurality of azimuths, inclinations and longitudinal locations within the borehole. The method is additionally used to generate three dimensional images of the ratio of compressional to shear acoustic velocity of the same volume surrounding the borehole.
    • 在本公开的一些方面，公开了一种用于使用输送的测井工具在远离钻孔的区域中创建非线性特性的三维图像和压缩剪切速度比的方法。 在一些方面，该方法包括在钻孔中布置第一源并且以第一频率产生具有弹性能的转向束; 在钻孔中布置第二源，并在第二频率处产生可转向的弹性能量束，使得在第一频率处的可转向波束和第二频率处的可操纵波束在远离钻孔的位置处截取; 在钻孔处由传感器接收由三波混合过程产生的第三弹性波，其频率等于第一和第二频率之间的差异以及朝向钻孔传播的方向; 基于第一和第二源的布置以及第三波信号的特性来确定三波混频区域的位置; 以及使用通过重复生成，接收和确定钻孔内的多个方位角，倾斜度和纵向位置而记录的数据来创建非线性性质的三维图像。 该方法另外用于产生围绕钻孔的相同体积的压缩与剪切声速之比的三维图像。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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