Abstract: A magnetic flux measurement apparatus and method for nondestructive thickness imaging of metallic objects. The apparatus can primarily be used for thickness imaging of concentric metallic pipes, such as inner tubing and outer casing pipes in downhole applications. The magnetic flux measurement apparatus includes a transducer that includes a magnetic field source, magnetic flux sensor rings and a magnetic flux guide lens both positioned in alignment with a lateral axis of the magnetic field source. The magnetic flux guide lens is made of ferromagnetic material with high magnetic permeability that can direct flux lines into a predetermined sensor area for higher sensitivity and signal to noise ratio.

Abstract: A method for measuring a wall thickness of two concentric pipes includes launching a pipe inspection gauge (pig) within an inner pipe of the two concentric pipes; emitting, using an electromagnetic (EM) transmitter of the pig, magnetic fluxes toward one or more EM receivers of the pig; focusing, using one or more focusing devices, the emitted magnetic fluxes to compress and guide the emitted magnetic fluxes through the inner pipe toward the outer pipe and increase a signal to noise ratio of the one or more EM receivers; measuring, using the one or more EM receivers, the compressed and guided magnetic fluxes to generate a measured flux for providing to a pipe anomaly analyzer; and determining, using the pipe anomaly analyzer and based on the measured flux, the wall thickness of an outer pipe of the two concentric pipes.

Abstract: An inductive transducer apparatus for testing metallic objects using Pulsed Eddy Current topology. The Apparatus includes a transmitter coil, a receiver coil, and a hybrid core. The hybrid core has a high saturation point which allows the transducer to generate a strong initial magnetic field that may further induce strong eddy currents on the surface of the target capable of penetrating deep into metallic objects under inspection. The hybrid core also has a high permeability which enhances the transducer's sensitivity and allows to maintain high signal-to-noise-ratio and of the received signal associated with Eddy Current magnetic field decaying, thus enhancing the system's performance in environments where reliable quantitative analysis of flaws located deep underneath the surface of metal objects is required. A linearity compensation method may be applied to further enhance the performance of the system.

Abstract: A magnetic flux measurement apparatus and method for nondestructive thickness imaging of metallic objects. The apparatus can primarily be used for thickness imaging of concentric metallic pipes, such as inner tubing and outer casing pipes in downhole applications. The magnetic flux measurement apparatus includes a transducer that includes a magnetic field source, magnetic flux sensor rings and a magnetic flux guide lens both positioned in alignment with a lateral axis of the magnetic field source. The magnetic flux guide lens is made of ferromagnetic material with high magnetic permeability that can direct flux lines into a predetermined sensor area for higher sensitivity and signal to noise ratio.

Abstract: A device and method for nondestructively inspecting, measuring, and/or detecting metallic. The device may enable multiple synthetic apertures for measurements simultaneously. The device includes a transmitter coil array and a receiver coil array wound around a core. The receiver coil array includes multiple receiver coil sections built with gaps in between adjacent sections to form multiple associated apertures. An analog electrical network is coupled to the multiple receiver coil sections to enable multiple combined synthetic apertures to be operated together for the transducer to conduct measurements simultaneously to provide multiple outputs associated to the multiple synthetic apertures. Measurement signals can be combined to build a processed signal that can represent more accurate information from the target.

Abstract: An apparatus and method to evaluate light-weight cement (LWC) bond conditions behind the casing in a downhole environment of a wellbore. The apparatus includes a logging (CBL) instrument that can detect aberrations in the LWC behind the casing based on variations in the transducer impedance measurements without using pad. The CBL instrument includes a transducer matrix, a signal acquisition controller, a data processing module, and a communication unit.

Abstract: The present disclosure relates to embodiments of a device and method for inspecting and detecting characteristics of tubing and devices attached to tubing. More particularly, embodiments of a device and method are disclosed for inspecting a number of tube walls surrounding an innermost tube wall. In embodiments, an inspection device may induce an eddy current in surrounding tube walls by producing an electromagnetic field, wherein the induced eddy current may be recorded and analyzed for aberrations. Eddy currents may be produced by a sensor array comprising a hybrid magnetic matrix core capable of inducing an electromagnetic field at a high saturation point while maintaining good linearity. The eddy current decay and diffusion in the tube walls may be recorded, specifically recording voltage in embodiments, which may produce a function of the tube thickness and electromagnetic properties (e.g. metal conductivity and magnetic permeability) and the configurations of tubes.

Abstract: A system and method for inspecting cement downhole in multi-casing wells. The method may comprise inserting an inspection device into a tube. The inspection device may comprise a plurality of transducers, wherein the plurality of transducers comprise one or more transducers. Further, the inspection device may comprise an inner tubing and at least one mount. The method for inspecting cement downhole may further comprise exciting the plurality of transducers, sweeping the plurality of transducers from a minimum frequency value to a maximum value, and matching frequency value of the plurality of transducers to a frequency value of a target structure.

Abstract: A method and system for inspecting cement downhole. The method may comprise inserting an inspection device inside a tubing. The inspection device may comprise a centralizing module as well as a transducer, an azimuthal receiver, and a telemetry module. The method may further comprise activating the transducer, wherein the transducer generates a low-frequency cylindrical acoustic wave with normal incidence, detecting the locations and strengths of resonances generated, and creating a graph with an information handling system for analysis.

Abstract: A method and system for inspecting cement downhole. The method may comprise inserting an inspection device inside a tube. The inspection device may comprise a centralizing module as well as a tapper attached to the centralizing module. The inspection device may further comprise a receiver, a micro controller unit, and a telemetry module. The method may further comprise actuating the tapper, wherein the tapper produces a nonlinear wave, recording reflections of acoustic waves off a tubing or a casing, and creating a graph with an information handling system for analysis. An inspection device may comprise a centralizing module and a tapper attached to the centralizing module. The inspection device may further comprise a receiver, an information handling system, and a memory module.

Abstract: Methods for locating an acoustic source. A method may comprise measuring noise from the acoustic source from a downhole environment, which produces a measurement for processing, performing a dispersion analysis on the measurement, performing a space entropy equalization and normalization process on the measurement, performing a weighted integration on the measurement, performing a pattern recognition on the measurement, performing a weighted enhancement on the measurement, and producing a recognition factor from the measurement. A method may comprise measuring noise from the acoustic source from a downhole environment, which produces a measurement for processing, performing a dispersion analysis on the measurement, performing a time difference scan on the measurement, performing a propagation distance scan on the measurement, performing a weighted enhancement on the measurement, and producing a recognition factor from the measurement.

Abstract: A method and system for inspecting light-weight cement downhole. The method may comprise inserting an inspection device into a casing. The inspection device may comprise a transducer, a centralizing module, and a telemetry module. The method may further comprise activating the transducer, wherein the transducer generates acoustic vortex waves, detecting the locations of fluid gaps, and creating a graph with an information handling system for analysis.

Abstract: A method and system for inspecting cement downhole. The method may comprise inserting an inspection device inside a casing. The inspection device may comprise a transducer, a micro-controller unit, an information handling system, and a centralizing module. The method may further comprise activating the transducer, wherein the transducer generates a non-stationary acoustic wave, determining a measurement using the inspection device, and generating an estimated cement impedance output using at least the measurement and data corresponding to the impedance and inner diameter of a casing and the impedance of the transducer.

Abstract: A method and system for inspecting cement downhole. The method may comprise inserting an inspection device inside a tubing. The inspection device may comprise a centralizing module as well as a transducer, an azimuthal receiver, and a telemetry module. The method may further comprise activating the transducer, wherein the transducer generates a low-frequency cylindrical acoustic wave with normal incidence, detecting the locations and strengths of resonances generated, and creating a graph with an information handling system for analysis.

Abstract: A method and system for inspecting cement downhole. The method may comprise inserting an inspection device inside a tube. The inspection device may comprise a centralizing module as well as a tapper attached to the centralizing module. The inspection device may further comprise a receiver, a micro controller unit, and a telemetry module. The method may further comprise actuating the tapper, wherein the tapper produces a nonlinear wave, recording reflections of acoustic waves off a tubing or a casing, and creating a graph with an information handling system for analysis. An inspection device may comprise a centralizing module and a tapper attached to the centralizing module. The inspection device may further comprise a receiver, an information handling system, and a memory module.

Abstract: An isolator device and method for isolating frequencies. An isolator device may comprise a segment, wherein the segment comprises a first shell, wherein the first shell comprises a first end and a second end. The isolator device may further comprise an opening, wherein the opening is disposed within the at least one shell and wherein the opening is disposed in a quasi periodic sequence. A method for isolating frequencies may comprise attaching an isolator device to a downhole tool, inserting a downhole tool into a tube, wherein the downhole device comprises a sensor cartridge, broadcasting a signal into the tube, absorbing a reflected signal with the isolator, removing a frequency within the signal, and receiving the signal with the sensor cartridge.

Abstract: A system and method for inspecting a tube. An inspection system may comprise a telemetry module which may comprise an accelerometer. The inspection system may further comprise a centralizing module which may comprise at least three arms. The inspection system may further comprise an inspection device which may comprises a memory module, a differential amplifier, and a sensor array, wherein the sensor array comprises a transmitter, core, and plurality of receivers. The inspection system may also comprise a service device. A method for inspecting a tube may comprise inserting an inspection device into a tube, wherein the inspection device may comprise a sensor array and a memory unit. The method may further comprise energizing the sensor array, wherein an electro-magnetic field may be emitted from the sensor array. Additionally, the method may comprise inducing a magnetic field within the tubing, and measuring voltage with a receiver of the sensor array.

Abstract: A system and method for inspecting a tube comprising a telemetry module, a centralizing module, an inspection device, a differential amplifier, a sensor array, and a service device. In embodiments, a tube inspection device may comprise a sensor array. The sensor array may further comprise a center receiver coil, a ferri-core, a peripheral receiver, and a transmitter coil. A method for inspection a tube may comprise inserting an inspection device into a tube, energizing a sensory array, inducing an eddy current within the tubing, and measuring voltage with a center receiver coil and a peripheral receiver of the sensor array.

Abstract: A method of creating a synthetic aperture. The method may comprise identifying a static configuration, inputting the static configuration into a dynamic controller, configuring a transmitter with the dynamic controller, and configuring a receiver with the dynamic controller. The method may further comprise inputting operational variables and environmental variables into a dynamic configuration, inputting the dynamic configuration into the dynamic controller, and re-configuring the transmitter and the receiver with the dynamic controller.

Abstract: Methods and a system for detecting through casing formation resistivity. A method may comprise inserting an inspection device inside a tube, activating the transmitter coil, recording signals with the receiver coil array, creating a transmitter matrix from an electromagnetic field produced from the transmitter coil, creating a receiver matrix from the recorded signals, and determining a through casing formation resistivity of a target from the transmitter matrix and the receiver matrix. A method may further comprise determining a casing thickness of a target from the transmitter matrix and the receiver matrix. An inspection device may comprise a sensor array comprising a transmitter coil array and a receiver coil array. The inspection device may further comprise a sensor array housing, wherein the sensor array is disposed within the sensor array housing, a memory module, and a differential amplifier.