公开(公告)号：US06717410B2

公开(公告)日：2004-04-06

申请号：US10437138

申请日：2003-05-13

申请人： Morio Mizuno

发明人： Morio Mizuno

IPC分类号： G01V310

CPC分类号： E21B7/046 ,  E21B47/02224 ,  G01V3/081 ,  G01V3/15

摘要： A system for locating a horizontal bore below a ground surface includes a transmitting source that radiates from the bore a dipole magnetic field aligned with the bore. A receiver includes a first and a second coil, the axis of each coil being orthogonal to the axis of the other. A measurement device in communication with the coils is configured to measure the phase of signals induced in the coils by the magnetic field when the axis of the first coil is horizontally perpendicular to the axis of the magnetic field and the axis of the second coil is vertically perpendicular to the axis of the magnetic field. The measurement device determines the lateral position of the transmitting source relative to the coils responsively to the phase of the signals induced on the two coils.

摘要翻译： 用于在地表面下方定位水平孔的系统包括从孔辐射与孔相对准的偶极磁场的发射源。 接收器包括第一和第二线圈，每个线圈的轴线与另一个的轴线正交。 与线圈连通的测量装置被配置为当第一线圈的轴线垂直于磁场的轴线并且第二线圈的轴线垂直时，通过磁场来测量在线圈中感应的信号的相位 垂直于磁场的轴线。 测量装置响应于在两个线圈上感应的信号的相位来确定发射源相对于线圈的横向位置。

公开(公告)号：US06690169B2

公开(公告)日：2004-02-10

申请号：US09978209

申请日：2001-10-17

申请人： Bruce Halcro Candy

发明人： Bruce Halcro Candy

IPC分类号： G01V310

CPC分类号： G01V3/105

摘要： Metal detection apparatus containing at least two inductive coils one of which acts as a transmit coil and all of which act as receive coils and processing circuitry wherein a proportion of the first receive electronic signal and a proportion of the second receive electronic signal may be selected to produce various first resultant linear combination signals for the purpose of improved interference cancelling.

摘要翻译： 金属检测装置包含至少两个感应线圈，其中一个感应线圈用作发射线圈，并且其全部充当接收线圈和处理电路，其中第一接收电子信号的比例和第二接收电子信号的比例可被选择为 产生各种第一合成线性组合信号，以改善干扰消除的目的。

公开(公告)号：US06653838B2

公开(公告)日：2003-11-25

申请号：US09978211

申请日：2001-10-17

申请人： Bruce Halcro Candy

发明人： Bruce Halcro Candy

IPC分类号： G01V310

CPC分类号： G01V3/10

摘要： A metal detector with a transmit coil which transmits a magnetic field, transmit timing control circuitry, and receive signal circuitry and receive signal processing circuitry, and a low voltage and a high voltage power supply. The timing sequence generated within the transmit timing control circuitry produces control signals such that there are at least two different transmit periods, a short and a long period, and such that there are periods when no current flows through the transmit coil. The timing sequence is such that an average transmit coil energy at termination of the long periods is similar to that of an average transmit coil energy at termination of the short periods.

摘要翻译： 具有发射磁场的发射线圈的金属检测器，发射定时控制电路以及接收信号电路和接收信号处理电路以及低电压和高压电源。 在发射定时控制电路内产生的定时序列产生控制信号，使得存在至少两个不同的发射周期，短周期和长周期，并且使得存在没有电流流过发射线圈的周期。 定时序列使得在长周期终止时的平均发射线圈能量类似于短周期终止时的平均发射线圈能量的平均发射线圈能量。

公开(公告)号：US06597178B1

公开(公告)日：2003-07-22

申请号：US10065454

申请日：2002-10-18

申请人： Edward Nichols ,  Ugo Conti ,  Dzevat Omeragic

发明人： Edward Nichols ,  Ugo Conti ,  Dzevat Omeragic

IPC分类号： G01V310

CPC分类号： G01V3/28

摘要： A magnetic receiver with a magnetically permeable core is positioned inside a wellbore casing and operated in a feedback mode to reduce attenuation of a measurable magnetic field. The receiver employs a feedback device to reduce mutual coupling between the core and the casing, which reduces the otherwise normal attenuation of em signals inside the casing. The feedback device may be provided in the form of an extra or feedback winding that effectively cancels the inducing field inside the core and reduces the attenuation otherwise caused by the core-casing interaction. Alternatively, the magnetic receiver may employ, as the feedback device, a current feedback amplifier circuit to cancel the inducing field inside the core. Specifically, the circuit is operated to produce a secondary magnetic field that essentially cancels the inducing field inside the core.

摘要翻译： 具有导磁芯的磁性接收器位于井筒壳体的内部并以反馈模式操作以减小可测量的磁场的衰减。 接收机采用反馈装置来减少芯和壳体之间的相互耦合，这减少了外壳内em信号的正常衰减。 反馈装置可以以额外的或反馈绕组的形式提供，其有效地消除了芯内的感应场，并且减小了否则由芯 - 套管相互作用引起的衰减。 或者，磁接收器可以采用电流反馈放大器电路作为反馈装置来消除芯内的感应场。 具体地，电路被操作以产生基本上抵消芯内的感应场的次级磁场。

公开(公告)号：US06580268B2

公开(公告)日：2003-06-17

申请号：US09940865

申请日：2001-08-28

申请人： Ben B. Wolodko

发明人： Ben B. Wolodko

IPC分类号： G01V310

CPC分类号： E21B47/0008 ,  G01N27/82 ,  G01N27/83

摘要： Apparatus and methods for measuring cross sectional area and flaws in a continuous sucker rod string as the string is conveyed within a borehole. These measured parameters are useful is monitoring the physical integrity of the sucker rod string. A magnet is used to saturate an increment of continuous sucker rod, and a coil is used to measure induced flux. Cross sectional area of the rod increment is computed from the flux measurement. One or more Hall effect transducers are used to measure leakage from the increment as a function of distance along the increment. This measurement is used to detect and quantify the type of flaw within the rod increment being investigated. The process is repeated as the sucker rod string is conveyed into or out of the borehole.

摘要翻译： 当钻杆在钻孔内传送时，用于测量连续抽油杆柱中的横截面积和瑕疵的装置和方法。 这些测量参数是有用的是监测抽油杆柱的物理完整性。 磁铁用于饱和连续抽油杆的增量，线圈用于测量诱导通量。 根据通量测量计算棒增量的截面面积。 使用一个或多个霍尔效应传感器来测量增量中的泄漏作为沿着增量的距离的函数。 该测量用于检测和量化正在研究的棒增量内的缺陷类型。 当抽油杆杆被输入或移出钻孔时，重复该过程。

公开(公告)号：US06541965B1

公开(公告)日：2003-04-01

申请号：US09687641

申请日：2000-10-13

申请人： Albert Binder ,  Roger Golder

发明人： Albert Binder ,  Roger Golder

IPC分类号： G01V310

CPC分类号： G01V3/104

摘要： The inductive sensor arrangement for detecting metal objects hidden in a surrounding medium comprises a pair of field coils for generating an alternating magnetic flux by a sequential excitation with an AC-current and a pair of sense coils respectively mounted inside each associated field coil in an orientation to the axes of each of said field coils such that essentially no voltage is induced in said sensor coils in an environment free of a metallic object. If a metallic object comes into the vicinity of the inductive sensor four characteristic voltage value sets are produced by the sense coil pair which become subject of an algorithmic processing for defining a position and distinction criterion in respect to said hidden metallic object. The sensor arrangement has the advantage of a single point measurement resulting in an accurate position discrimination for a hidden metallic object like a rebar in concrete.

摘要翻译： 用于检测隐藏在周围介质中的金属物体的感应传感器装置包括一对场线圈，用于通过具有AC电流的顺序激励和分别安装在每个相关联的线圈内的方向上的一对感测线圈产生交变磁通量 到每个所述励磁线圈的轴线，使得在没有金属物体的环境中，在所述传感器线圈中基本上不产生电压。 如果金属物体进入电感式传感器附近，则通过感测线圈对产生四个特征电压值集合，该检测线圈对成为用于定义关于所述隐藏的金属物体的位置和区别标准的算法处理的主体。 传感器布置具有单点测量的优点，导致隐藏的金属物体（例如混凝土中的钢筋）的位置识别准确。

公开(公告)号：US06407550B1

公开(公告)日：2002-06-18

申请号：US09136767

申请日：1998-08-19

申请人： Gopalakrishnan R. Parakulam ,  Stevan Polak

发明人： Gopalakrishnan R. Parakulam ,  Stevan Polak

IPC分类号： G01V310

CPC分类号： G01V3/15

摘要： A line locator having the capability of determining the horizontal position with respect to a line is described. The line locator includes a left sensor and a right sensor of any orientation. The left sensor and the right sensor are coupled to a convolution amplifier that amplifies the sum of the output signals from the left sensor and the right sensor. The detection circuitry includes automatic gain control amplification where the automatic gain control signal is obtained digitally from a digital controller. In addition, the detection circuitry includes phase detection circuitry where the phase reference signal is obtained from an external transmitter that is coupled to the line. In addition, the AGC signal and the phase reference signal may both be obtained by processing output signals from magnetic field detectors in the line locator.

摘要翻译： 描述具有确定相对于线的水平位置的能力的线定位器。 线定位器包括左传感器和任何方向的右传感器。 左传感器和右传感器耦合到卷积放大器，其放大来自左传感器和右传感器的输出信号的总和。 检测电路包括自动增益控制放大，其中自动增益控制信号是从数字控制器数字地获得的。 此外，检测电路包括相位检测电路，其中从耦合到该线路的外部发射器获得相位参考信号。 此外，AGC信号和相位参考信号都可以通过处理来自线定位器中的磁场检测器的输出信号来获得。

公开(公告)号：US06300762B1

公开(公告)日：2001-10-09

申请号：US09363597

申请日：1999-07-29

申请人： Stanley R. Thomas, Jr. ,  Brian Clark

发明人： Stanley R. Thomas, Jr. ,  Brian Clark

IPC分类号： G01V310

CPC分类号： E21B47/011

摘要： The present invention relates generally to the use of polyaryletherketone-based thermoplastic materials in high pressure, high temperature, production logging applications. A polyaryletherketone resin bonded with glass fibers is formed into a housing for formation evaluation sensors permanently located downhole. The housing is constructed by any of the following processes: filament winding, fiber placement, or compression molding or injection molding. When used in a production well, the housing encloses the formation evaluation sensors and protects the sensors from borehole fluids. Housing properties can be modified with changes in materials added to the resin in order for the housing to function as casing or coiled tubing. This would allow wireline or logging-while-drilling conveyed sensors passing through the casing or coiled tubing to sense the formation and borehole fluid properties.

摘要翻译： 本发明一般涉及在高压，高温，生产测井应用中使用基于聚芳醚酮的热塑性材料。 与玻璃纤维结合的聚芳醚酮树脂形成为永久地位于井下的用于地层评价传感器的壳体。 外壳由以下任何一种方法制成：丝缠绕，纤维放置或压塑或注射成型。 当在生产井中使用时，外壳包围地层评估传感器，并保护传感器免受井眼流体的影响。 可以通过改变添加到树脂中的材料来改变壳体性能，以使壳体用作套管或盘管。 这将允许穿过套管或连续油管的电缆或测井钻井传送的传感器感测地层和井眼流体性质。

公开(公告)号：US06218842B1

公开(公告)日：2001-04-17

申请号：US09368471

申请日：1999-08-04

申请人： Michael Bittar ,  Roger Bartel

发明人： Michael Bittar ,  Roger Bartel

IPC分类号： G01V310

CPC分类号： G01V3/30

摘要： A resistivity tool for use in an LWD system includes an asymmetric transmitter design with multiple transmitters capable of generating EM signals at multiple frequencies. A pair of receivers are positioned at one end of the transmitter array to detect the EM signals after they have traversed the region in the vicinity of the borehole. A calibrating transmitter is positioned between the receivers, which can be used in two different modes of operation. In a first mode, the calibrating transmitter is used to calibrate the receivers for thermal drift. In this calibration mode, an attenuation correction and phase shift correction can be calculated to correct for thermal drift of the receivers while the resistivity tool is in the borehole. Thus, the thermal drift of the receivers can be re-calibrated as often as desired while the tool is in the well. In a second mode of operation, the calibrating receiver may be used to measure the resistivity of the drilling mud in the borehole.

摘要翻译： 用于LWD系统的电阻率工具包括具有能够以多个频率产生EM信号的多个发射机的非对称发射机设计。 一对接收器位于发射器阵列的一端，以在它们已经穿过钻孔附近的区域之后检测EM信号。 校准发射机位于接收器之间，可用于两种不同的操作模式。 在第一种模式下，校准变送器用于校准接收器进行热漂移。 在该校准模式中，可以计算衰减校正和相移校正，以校正接触器的热漂移，同时电阻率工具在井眼中。 因此，当工具在井中时，可以根据需要经常地重新校准接收器的热漂移。 在第二种操作模式中，校准接收器可用于测量钻孔中钻井泥浆的电阻率。