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    METHOD AND APPARATUS FOR GENERATION OF POLYNOMIAL DELAY VALUES
    2.
    发明申请
    METHOD AND APPARATUS FOR GENERATION OF POLYNOMIAL DELAY VALUES 有权

    公开(公告)号：US20250020805A1

    公开(公告)日：2025-01-16

    申请号：US18715758

    申请日：2023-06-02

    Applicant: DarkVision Technologies Inc.

    Inventor： Graham T. Manders

    IPC: G01S15/89 ,  G01S7/521

    Abstract: Various embodiments of a method and apparatus for performing delay calculations are disclosed. In some embodiments, the delay values are used for nondestructive ultrasound imaging. The delay calculations are performed by interpolating the delay values between sampled delay values. In some embodiments, an interpolation polynomial is evaluated for each position in an interpolation region of a transducer array. In some embodiments, the delay values are computed by interpolating the polynomial coefficients. In some embodiments, higher order derivatives of the delay are integrated to compute lower order derivatives, where the derivatives are computed based on the polynomial coefficients. The process is continued until the delay function computes from the first derivatives of the delay function. The delay function is then derived by integrating the first derivative of the delay function.

    Device and method to image flow in oil and gas wells using phased array doppler ultrasound
    4.
    发明授权
    Device and method to image flow in oil and gas wells using phased array doppler ultrasound 有权

    公开(公告)号：US11619125B2

    公开(公告)日：2023-04-04

    申请号：US17389918

    申请日：2021-07-30

    Applicant: DarkVision Technologies Inc

    Inventor： Osman S. Malik ,  Graham T. Manders ,  Stephen E. Robinson

    IPC: E21B47/107 ,  G01S15/89 ,  G01S15/88 ,  G01F1/663 ,  G01F1/74 ,  E21B47/002 ,  E21B43/11 ,  E21B43/26

    Abstract: A device and method for imaging, measuring and identifying multiphase fluid flow in wellbores using phased array Doppler ultrasound. The device includes a radially-configured or ring-shaped ultrasound transducer that when deployed in a well in Doppler mode can measure the velocity of radially flowing fluids in the wellbore and generate a 3D image of radial flow in the wellbore, including flowback into the wellbore after fracturing operations, or flow leaving the wellbore during water injection operations. The ring-shaped ultrasound transducer can also simultaneously operate in a B-mode to generate a B-mode image of the wellbore liner upon which the Doppler image can be overlaid. The device may also include a forward facing ultrasound transducer either instead of or in place of the ring-shaped transducer for obtaining information and images on axial flow in the wellbore in Doppler mode, and the location of phase boundaries and phase locations in B-mode.

    ULTRASONIC IMAGING DEVICE AND METHOD FOR WELLS
    5.
    发明申请
    ULTRASONIC IMAGING DEVICE AND METHOD FOR WELLS 有权

    公开(公告)号：US20250034984A1

    公开(公告)日：2025-01-30

    申请号：US18915378

    申请日：2024-10-15

    Applicant: DarkVision Technologies Inc

    Inventor： Graham T. Manders ,  Osman S. Malik ,  Stephen E. Robinson ,  Jay Roderick Hope

    IPC: E21B47/002 ,  B06B1/06 ,  G01N29/024 ,  G01N29/24 ,  G01N29/26 ,  G01N29/34 ,  G01V1/00 ,  G01V1/46 ,  G01V1/52

    Abstract: A method for imaging a wellbore in a spiral wave imaging mode using a phased array ultrasonic radial imaging probe having an annular transducer array comprising a plurality of elements, the method comprising the steps of a) pulsing a first element in the transducer array that forms part of a first sequence of elements, b) pulsing a second element that forms part of the first sequence of elements, c) repeating steps a) and b) for each element in the first sequence with a time delay between steps a) and b), d) receiving signals for each element in the first sequence, e) applying time delays to the received signals to achieve virtual beamforming and form imaging data, f) repeating steps a) to e) for additional sequences of elements in the transducer array, and g) coherently summing the imaging data from each sequence to form a 3D image of the wellbore.

    Device and method to image flow in oil and gas wells using phased array doppler ultrasound
    7.
    发明授权
    Device and method to image flow in oil and gas wells using phased array doppler ultrasound 有权

    公开(公告)号：US11092002B2

    公开(公告)日：2021-08-17

    申请号：US15558946

    申请日：2016-03-15

    Applicant: DarkVision Technologies Inc.

    Inventor： Osman S. Malik ,  Graham T. Manders ,  Stephen E. Robinson

    IPC: E21B47/10 ,  E21B47/107 ,  G01S15/89 ,  G01S15/88 ,  G01F1/66 ,  G01F1/74 ,  E21B47/002 ,  E21B43/11 ,  E21B43/26

    Abstract: A device and method for imaging, measuring and identifying multiphase fluid flow in wellbores using phased array Doppler ultrasound. The device includes a radially-configured or ring-shaped ultrasound transducer that when deployed in a well in Doppler mode can measure the velocity of radially flowing fluids in the wellbore and generate a 3D image of radial flow in the wellbore, including flowback into the wellbore after fracturing operations, or flow leaving the wellbore during water injection operations. The ring-shaped ultrasound transducer can also simultaneously operate in a B-mode to generate a B-mode image of the wellbore liner upon which the Doppler image can be overlaid. The device may also include a forward facing ultrasound transducer either instead of or in place of the ring-shaped transducer for obtaining information and images on axial flow in the wellbore in Doppler mode, and the location of phase boundaries and phase locations in B-mode.

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