公开(公告)号：US10436018B2

公开(公告)日：2019-10-08

申请号：US15288092

申请日：2016-10-07

Applicant: BAKER HUGHES INCORPORATED

Inventor： Babak Kouchmeshky ,  Xiaochu Yao ,  Stanislav Forgang ,  Pawel J. Matuszyk ,  Marc S. Ramirez ,  Otto N. Fanini ,  Douglas J. Patterson ,  Vimal Shah

IPC: G01N29/24 ,  G01N29/34 ,  E21B47/09 ,  G01V1/52 ,  B06B1/04 ,  E21B47/16 ,  G01N29/28

Abstract: Systems, devices, and methods for estimating a value of a downhole parameter of interest. Aspects include an apparatus for evaluating a tubular. The apparatus may include a sensor including an electromagnetic acoustic transducer (EMAT) device configured to be conveyed into the tubular. The EMAT device may include measurement circuitry comprising at least one conductive coil; and a magnet array comprising magnets arranged with a corresponding direction of magnetization of each magnet oriented according to a configuration producing a greater magnetic flux on a first side of the array than on a second side opposing the first side. The magnetic flux produced from the second side may be substantially zero. In embodiments, the configuration of magnets comprises at least a first set of permanent magnets in a linear Halbach configuration.

公开(公告)号：US10302792B2

公开(公告)日：2019-05-28

申请号：US15178290

申请日：2016-06-09

Applicant: BAKER HUGHES INCORPORATED

Inventor： Douglas J. Patterson ,  Eduardo A. Cazeneuve

IPC: G01V1/50 ,  E21B47/022 ,  E21B47/04 ,  G01V1/28 ,  G01V1/46

Abstract: Systems, devices and methods for evaluating an earth formation intersected by a borehole. Method include detecting a reflective boundary in the earth formation by: generating a multipole acoustic signal with a logging tool in the borehole; identifying a shear wave signal resulting from shear body waves reflected in the formation in a near-field region of the formation around the borehole responsive to the generated multipole acoustic signal; and estimating at least a depth along the borehole of the boundary based on the shear wave signal. The boundary may have an angle of incidence with respect to the borehole of greater than 70 degrees. The boundary may be at least one of i) a fracture; and ii) a fault. The method may include evaluating the boundary using at least one attribute of the shear wave signal and the estimated depth.

公开(公告)号：US10222501B2

公开(公告)日：2019-03-05

申请号：US15409200

申请日：2017-01-18

Applicant: BAKER HUGHES INCORPORATED

Inventor： Zhijuan Zhang ,  Douglas J. Patterson ,  Roger R. Steinsiek ,  Wei Han

IPC: G01V1/50 ,  E21B47/00 ,  G01V1/40 ,  G01V1/34 ,  G01V1/52

Abstract: Systems, devices, and methods for evaluating an earth formation intersected by a borehole using signals produced at a plurality of borehole depths by an ultrasonic transducer in the borehole, the signals produced by the transducer including ringdown signals from the ultrasonic transducer and echo signals from a wall of the borehole from a plurality of azimuthal orientations. Methods include using peak amplitude values and arrival time values from the signals to construct a background modulation template corresponding to at least one depth; estimating, for each respective depth of the plurality of borehole depths, an azimuthally varying interference pattern predominantly resulting from a ringdown signal for each respective depth by mapping the modulation template to arrival time values corresponding to the respective depth; and subtracting, for each respective depth, the estimated varying interference pattern from the peak amplitude values corresponding to the respective depth to generate adjusted peak amplitudes.

公开(公告)号：US20180372902A1

公开(公告)日：2018-12-27

申请号：US15632024

申请日：2017-06-23

Applicant: BAKER HUGHES INCORPORATED

Inventor： Wei Han ,  Jason M. Harris ,  Douglas J. Patterson ,  Stephen Dymmock ,  John Dahl

IPC: G01V1/50

Abstract: Methods and apparatus for performing formation evaluation in a borehole intersecting an earth formation. Methods may include exciting at a first borehole depth at least one critical refraction wave by steering an acoustic beam transmitted by at least one ultrasonic transmitter to an interface in the formation to intercept the interface at a critical angle; receiving an acoustic signal comprising critical refraction wave data at a logging tool in the borehole; and obtaining a wave property measurement from the critical refraction wave data. The interface may be the borehole wall in an open-hole well or behind casing. Methods include using ultrasonic transmitter(s) to generate the plurality of acoustic beams, identifying critical refraction wave data within the response signal corresponding to the at least one critical refraction wave, and obtaining the wave property measurement from the critical refraction wave data.

公开(公告)号：US08913461B2

公开(公告)日：2014-12-16

申请号：US14109553

申请日：2013-12-17

Applicant: Baker Hughes Incorporated

Inventor： Roger R. Steinsiek ,  Jason M. Harris ,  Jinsong Zhao ,  Douglas J. Patterson ,  James B. Domnanish

IPC: G01V1/00

CPC classification number: G01V1/345 ,  B06B1/0622 ,  G01V1/40 ,  G01V1/48

Abstract: Measurements made by a transducer assembly for downhole imaging are affected by reverberations between the transducer and the window on the outside of the assembly. The reverberations result in a stationary noise on the image. Hardware solutions to improve signal-to-noise ratio includes using a composite transducer, adjusting the distance between the transducer and the window. SNR can also be improved by processing techniques that include stacking, fitting a sinusoid to the reverberation, by envelope peak detection, and by applying a notch filter.

Abstract translation: 用于井下成像的换能器组件进行的测量受到传感器与组件外部的窗口之间的混响的影响。 混响导致图像上的静止噪声。 提高信噪比的硬件解决方案包括使用复合传感器，调整传感器和窗口之间的距离。 还可以通过包括堆叠，将正弦曲线拟合到混响，通过包络峰值检测以及通过应用陷波滤波器的处理技术来改善SNR。