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    • 73. 发明授权
    • Method and apparatus for investigating stand-off in a borehole
    • 用于调查钻孔支座的方法和装置
    • US4692908A
    • 1987-09-08
    • US361224
    • 1982-03-24
    • Michael P. EkstromR. Mark Havira
    • Michael P. EkstromR. Mark Havira
    • G01V1/40E21B47/00E21B47/14G01B17/00G01H5/00G01V1/46G01V1/00G01V3/02H04B17/00
    • E21B47/082G01B17/00G01H5/00G01V1/46
    • An acoustic method and apparatus for investigating an earth formation penetrated by a borehole are described. Acoustic transducers are mounted on a tool to accurately determine the distance between a segment of the tool and the wall of the borehole. The acoustic transducers are positioned in such manner that the stand-off distance between individual resistivity measuring electrodes in an array, which is also mounted on the tool segment, and the borehole wall can be measured. The stand-off measurement is recorded and may be used to correct the electrode resistivity measurements. In one embodiment a calibration of acoustic transducers as a function of depth is obtained by employing acoustic calibrating transducers to compensate for borehole environment effects on the performance of the acoustic transducers as well as determine the acoustic velocity of the borehole fluid, such as mud. Several embodiments are described.
    • 描述了一种用于研究钻孔穿透的地层的声学方法和装置。 声学传感器安装在工具上以准确地确定工具的一段与钻孔的壁之间的距离。 声学传感器以这样的方式定位,使得可以测量阵列中的各个电阻率测量电极(也安装在工具段上)与钻孔壁之间的间隔距离。 记录对位测量,并可用于校正电极电阻率测量。 在一个实施例中,作为深度的函数的声学换能器的校准是通过使用声学校准换能器来补偿钻孔环境对声学换能器的性能的影响以及确定诸如泥浆的井眼流体​​的声速来获得的。 描述几个实施例。
    • 74. 发明授权
    • Acoustic logging in low velocity formations
    • 低速地层声波测井
    • US4611685A
    • 1986-09-16
    • US618029
    • 1984-06-07
    • John W. Curran
    • John W. Curran
    • G01V1/46G10K11/18G01V1/40G01V1/00
    • G01V1/46G10K11/18
    • Acoustic logging of low velocity formations is made possible by the introduction of gas bubbles in the liquid in a borehole where logging equipment is present. Acoustic logging cannot be performed where the compressional wave velocity in the borehole liquid exceeds the compressional wave velocity in the formation to be logged because in such case, the acoustic compressional waves do not refract in the formation. The gas bubbles are introduced to lower the compressibility of the borehole liquid, resulting in a decreased velocity in the liquid so that refraction of the compressional waves can take place, making acoustic logging feasible.
    • 通过在存在测井设备的钻孔中的液体中引入气泡,可以实现低速地层的声学测井。 在井眼液体中的压缩波速度超过要记录的地层中的压缩波速度的情况下,不能执行声学测井,因为在这种情况下,声压缩波在地层中不折射。 引入气泡以降低井眼液体的压缩性,导致液体中的速度降低,使得可以发生压缩波的折射,从而使声学记录成为可能。
    • 76. 发明授权
    • Circumferential acoustic device
    • 环绕声装置
    • US4293934A
    • 1981-10-06
    • US49753
    • 1979-06-18
    • Robert A. HerolzCharles B. Vogel
    • Robert A. HerolzCharles B. Vogel
    • G01V1/46G01V1/40
    • G01V1/46Y10S367/911
    • A method and apparatus for acoustical logging wherein a plurality of transducers are spaced circumferentially in a plane perpendicular to the borehole and in close proximity to the wall of the borehole. Numerous circumferential acoustic transmission paths are defined by using some of the transducers as transmitters and others as receivers. Ultrasound is transmitted and received separately along each of the paths and amplitudes of the received waves are separately recorded to provide a side-by-side comparison of the signals. The received waves may be comprised of shear waves and compressional waves, and the shear wave amplitude may be recorded to the exclusion of later arriving waves. Proper spacing of the transmitters and receivers will produce a complete circumferential acoustic log of the borehole that can be used to detect the presence of vertical fractures.
    • 一种用于声学测井的方法和装置,其中多个换能器在垂直于钻孔并且靠近钻孔壁的平面中沿周向隔开。 通过使用一些换能器作为发射器和其它作为接收器来定义许多圆周声传播路径。 每个路径分别发送和接收超声波,并分别记录接收波的振幅,以提供信号的并排比较。 接收的波可以由剪切波和压缩波组成,并且可以记录剪切波幅度以排除后来到达的波。 发射器和接收器的适当间距将产生可用于检测垂直裂缝的存在的钻孔的完整圆周声学测井。
    • 78. 发明授权
    • Method and apparatus for dynamically investigating a borehole
    • 用于动态调查钻孔的方法和装置
    • US4123744A
    • 1978-10-31
    • US776336
    • 1977-03-10
    • John D. Ingram
    • John D. Ingram
    • G01V1/46G10K11/34G01V1/40
    • G10K11/346G01V1/46
    • An apparatus and method for investigating a borehole with energy transmissions whose directivity is varied in real time during the investigation is described. A plurality of transmitters are employed on a well logging tool with at least one receiver located ahead of the transmitters. The transmitters are repetitively activated to transmit a wave of energy to the receiver which produces a received wave. A parameter of the received wave is derived and used to vary the relative delay of activation of the transmitters to direct the beam of energy in a manner whereby the parameter is effectively enhanced for a subsequent investigation. A real time control is provided over the directivity of the energy transmissions to preferentially emphasize a particular segment of a received wave. An acoustic borehold investigation is described with which the detection of the travel time of a compressional wave or the peak value of a predetermined half cycle are optimized by controlling the directivity of the acoustic transmissions in real time.
    • 描述了一种用于在调查期间调查方向性实时变化的能量传输钻孔的装置和方法。 在测井工具上使用多个发射器,其中至少一个接收器位于发射器之前。 发射机被重复地激活以将能量波发射到产生接收波的接收机。 导出接收波的参数,并用于改变发射机的激活的相对延迟以引导能量束,从而有效地增强参数用于随后的调查。 在能量传输的方向性上提供实时控制以优先强调接收波的特定段。 描述了一种声学井眼研究,其中通过实时地控制声学传播的方向性来优化对压缩波的行进时间的检测或预定的半周期的峰值的检测。
    • 79. 发明授权
    • Acoustic velocity logging system
    • 声速测井系统
    • US3967235A
    • 1976-06-29
    • US489214
    • 1974-07-17
    • Charles L. DennisJoseph Zemanek, Jr.
    • Charles L. DennisJoseph Zemanek, Jr.
    • G01V1/46G01V1/40
    • G01V1/46
    • An acoustic velocity logging tool employs a transmitter and a pair of receivers. Acoustic pulses from the transmitter pass through the formation surrounding the borehole to the receivers. The received signals, along with control signals, are transferred to an uphole recording system. A record unit operates to apply these receiver and control signals to a magnetic tape recorder. A playback unit transfers the recorded receiver signals to the intensity modulation input of a cathode-ray oscilloscope and, in response to the recorded control signals, applies a trigger pulse to the sweep input of the cathode-ray oscilloscope. A film recorder makes a continuous film recording of the receiver signals as they appear as variable-density traces on the face of the cathode-ray oscilloscope.
    • 声速测井工具采用发射机和一对接收机。 来自发射机的声脉冲通过钻孔周围的地层到达接收器。 接收的信号以及控制信号被传送到井上记录系统。 记录单元操作以将这些接收器和控制信号应用于磁带录像机。 回放单元将记录的接收机信号传送到阴极射线示波器的强度调制输入,并且响应于所记录的控制信号,向阴极射线示波器的扫描输入端施加触发脉冲。 录像机对接收机信号进行连续胶片记录,因为它们在阴极射线示波器的表面上显示为可变浓度迹线。