Abstract: A method and system for identifying a deformation. The method may comprise disposing an electromagnetic logging tool in a pipe string, performing a logging operation with the electromagnetic logging tool, transmitting an electromagnetic field from a transmitter, energizing the casing string with the electromagnetic field to produce an eddy current, measuring the eddy current with at least one receiver, processing the measurements of the eddy current to find a point-wise eccentricity between the casing string and the pipe string, identifying a zone with the deformation based at least in part on the point-wise eccentricity, determining at least one characteristic of the deformation, and making a wellbore decision related to an integrity of the casing string based on the at least one characteristic of the deformation or the point-wise eccentricity. The system may comprise an electromagnetic logging tool which may comprise a transmitter and at least one receiver.

Abstract: A system, in some embodiments, comprises: a fiber optic cable; first and second sensors to control a length of said cable; and first and second receiver coils that control the first and second sensors, respectively, wherein the first and second sensors maintain said length when the first and second receiver coils receive only a direct signal from a transmitter, wherein the first and second sensors modify said length when the first and second receiver coils receive a scattered signal from a formation.

Abstract: A methods for the detection of pipe characteristics. The method may comprise disposing a defect detection tool in a wellbore, processing measurements from the defect detection tool in the wellbore to obtain a well log, storing the well log in a database, importing the well log from the database into inversion software, loading a well plan into the inversion software, determining collar locations on at least one concentric pipe in the wellbore utilizing a collar locator algorithm in the inversion software using the well log and well plan, calibrating a forward model in the inversion algorithm utilizing a calibration algorithm in the inversion software, generating an output log utilizing the inversion algorithm in the inversion software on the inversion zone, and determining false metal loss in the output log using the output log.

Abstract: A method for determining the activation of an expandable sand screen may comprise disposing an electromagnetic (EM) detection tool into a wellbore. The EM detection tool may comprise at least one transmitter and at least one receiver. The method may further comprise transmitting an EM field from the one or more transmitters into the expandable sand screen to energize the expandable sand screen and form an eddy current, recording a voltage of the eddy current with the at least one receiver, and determining an activation state of the expandable sand screen based at least partially on the voltage of the eddy current.

Abstract: Planning and real time optimization of one or more modules of a downhole tool provide efficient and cost-effective deployment of a measurement system, for example, for a ranging tool. Considerations of the environment and type of operation may be considered prior to the deployment of a downhole tool such that the downhole tool comprises modules that may be optimized. Certain modules may be activated for specific operations without having to extract the downhole tool as all modules necessary to perform the specific tasks for a given operation are included prior to deployment of the downhole tool. The one or more modules may be optimized in real time based, for example, on received measurements or previous survey results. The modularity of the downhole tool allows for flexibility in fine tuning the tool according to a varying formation environment and other parameters.

Abstract: A method and system for mitigating direct coupling. A method of mitigating direct coupling may comprise disposing an electromagnetic sensor system in a wellbore. The electromagnetic sensor system may comprises a receiver disposed on a conductive body and a gap sub disposed at another location on the conductive body. Exciting an electromagnetic source to inject an electrical current into a formation. Exciting the gap sub to achieve a small current condition at the selected point. Performing a first measurement at a receiver. Interpreting the first measurement to calculate a formation or pipe parameter and using the formation or pipe parameter to adjust at least one parameter of a well operation. A system of mitigating direct coupling may comprise a conductive body may comprise a gap sub, a controller, a voltage source, a receiver, and an information handling system. The information handling system may be operable to cancel current.

Abstract: Systems and methods for incorporating mandrel current measurements in deep ranging inversion. A method may include introducing a current through a transmitter into a subterranean formation, wherein the transmitter may be a component of an electromagnetic induction tool disposed in a wellbore, wherein the electromagnetic induction tool may comprise the transmitter, a toroid receiver, and a second receiver comprising a coil or electrode, wherein the transmitter, the toroid receiver, and the second receiver may be disposed on a tubular; measuring a first signal utilizing the toroid receiver, wherein the first signal may comprise a tubular current; measuring a second signal utilizing the receiver and determining at least one downhole parameter utilizing the first signal and the second signal.

Abstract: Systems and methods for utilizing diverse excitation sources in single well electromagnetic ranging. A method may include disposing an electromagnetic ranging tool in a wellbore, wherein the electromagnetic ranging tool may comprise one or more receivers, a coil source and an electrode source; performing a measurement with the one or more receivers of at least one component of a coil-induced magnetic field from the target wellbore to provide a coil measurement, wherein the coil-induced magnetic field may be induced by the coil source; performing a measurement with the one or more receivers of at least component of an electrode-induced electromagnetic field to provide an electrode measurement, wherein the electrode-induced electromagnetic field may be induced by the electrode source; and calculating at least one ranging parameter using, at least in part, the coil measurement and the electrode measurement.

Abstract: A tool and method for reducing azimuthal current. An EM induction tool may comprise a tubular, which may further comprise a body with a central axis and an insulating layer that may be non-azimuthally symmetric with respect to the central axis. The EM induction tool may further comprise a transmitter coupled to the tubular and a receiver coupled to the tubular. A method of reducing azimuthal current may comprise introducing a current through a transmitter into a subterranean formation, wherein the transmitter is coupled to a tubular, allowing an insulating layer of the tubular to at least partially block azimuthal currents originating from the transmitter from flowing on the tubular, wherein the insulating layer is non-azimuthally symmetric, and measuring eddy currents induced by the current with one or more receiver coupled to the tubular.

Abstract: A method and system for identifying a target well. A system for identifying a target well may comprise placing an electromagnetic ranging tool in a wellbore, transmitting an electromagnetic field into a formation, inducing an eddy current within a target well, measuring a second electromagnetic field from the target well, calculating a position or an orientation of a transmitter or a receiver relative to another position, and calculating at least one parameter of the target well. An electromagnetic ranging system may comprise an electromagnetic ranging tool and an information handling system. The information handling system may be operable to calculate a position and/or an orientation of a transmitter or a receiver relative to another position on the electromagnetic ranging tool disposed on a borehole assembly, and calculate at least one parameter of a target well from the calculated position or orientation of the transmitter and the receiver.

Abstract: Systems and methods for detection of pipe characteristics, such as defect detection of downhole tubulars and overall thickness estimation of downhole tubulars (e.g., pipes such as casing and/or production tubing).

Abstract: The structural integrity and reliability of a downhole tool, mandrel, casing or other downhole component may be improved by implementation of a design and configuration that does not require several separate components to be coupled together. Conductive ink electromagnetic antennas may be painted on an insulating layer or sheet. The insulating layer or sheet is affixed to the downhole component. The conductive ink electromagnetic antennas mate to wiring of the mandrel via caps or caps and pins. The conductive ink electromagnetic antennas may be excited and downhole measurements received that are indicative of any number of downhole parameters or conditions. The conductive ink electromagnetic antennas may be painted in any shape, dimension or size necessary for a given operation.

Abstract: A borehole resistivity distribution system includes a cable having an array of transmitters along a shared conductive loop. Each of the transmitters is coupled to a corresponding frequency-dependent material or device. An application of a first drive signal to the cable excites the transmitters, to obtain a first measurement, the first drive signal having a first frequency and a first amplitude. An application of a second drive signal to the cable excites the transmitters, to obtain a second measurement, the second drive signal having a second frequency and a second amplitude. At least the first frequency is different from the second frequency, or the first amplitude is different from the second amplitude. The system further includes a processor coupled to receive the first and second measurements, to derive, based at least in part on the measurements, a resistivity distribution around a borehole.

Abstract: Systems and methods for detection of pipe characteristics, such as defect detection of downhole tubulars and overall thickness estimation of downhole tubulars (e.g., pipes such as casing and/or production tubing).

Abstract: An electromagnetic induction tool and method. The electromagnetic induction tool may comprise a tool body, a gap sub may separate different sections of the tool body and may be positioned to at least partially hinder the flow of an axial current and an azimuthal current on the tool body. A coil antenna may be disposed over the gap sub. A method of increasing an electromagnetic field may comprise providing an electromagnetic induction tool. The electromagnetic induction tool may comprise a tool body, a gap sub may separate different sections of the tool body and may be positioned to at least partially hinder flow of an axial current and an azimuthal current on the tool body. A coil antenna may be disposed over the gap sub. The method may further comprise placing the electromagnetic induction tool into a wellbore and operating the coil antenna.

Abstract: Methods and systems for detection of pipe characteristics, such as defect detection, including corrosion inspection, of downhole tubulars and overall thickness estimation of downhole tubulars.

Abstract: Systems and methods for utilizing diverse excitation sources in single well electromagnetic ranging. A method may include disposing an electromagnetic ranging tool in a wellbore, wherein the electromagnetic ranging tool may comprise one or more receivers, a coil source and an electrode source; performing a measurement with the one or more receivers of at least one component of a coil-induced magnetic field from the target wellbore to provide a coil measurement, wherein the coil-induced magnetic field may be induced by the coil source; performing a measurement with the one or more receivers of at least component of an electrode-induced electromagnetic field to provide an electrode measurement, wherein the electrode-induced electromagnetic field may be induced by the electrode source; and calculating at least one ranging parameter using, at least in part, the coil measurement and the electrode measurement.

Abstract: In accordance with at least one aspect of this disclosure, a signal arithmetic processor includes a fiber optic cable including a fiber optic input and a fiber optic output and two or more electro-optical transducers coupled to the fiber optic cable between the fiber optic input and output and having at least a first electrode and second electrode, the two or more electro-optical transducers configured to modify an optical signal in the fiber optic cable based on a voltage between the first electrode and the second electrode of the two or more electro-optical transducers. The signal arithmetic processor can also include an interferometer coupled to the fiber optic cable and configured to sense a phase difference of a fiber optic signal between the fiber optic input and the fiber optic output.

Abstract: Planning and real time optimization of one or more modules of a downhole tool provide efficient and cost-effective deployment of a measurement system, for example, for a ranging tool. Considerations of the environment and type of operation may be considered prior to the deployment of a downhole tool such that the downhole tool comprises modules that may be optimized. Certain modules may be activated for specific operations without having to extract the downhole tool as all modules necessary to perform the specific tasks for a given operation are included prior to deployment of the downhole tool. The one or more modules may be optimized in real time based, for example, on received measurements or previous survey results. The modularity of the downhole tool allows for flexibility in fine tuning the tool according to a varying formation environment and other parameters.

Abstract: An example downhole tool for determining ranging parameters involves placing a guard electrode between a survey electrode and a return electrode where the survey electrode and the return electrode are separated by a gap subs. A fixed, predictable, and stable path for the survey current is formed that is independent of the conductivity of the mud or conductive targets resulting in a formation current that may be used to estimate the direction, orientation or distance of a conductive target. The formation current is then a stable current that excites a conductive target in the same way regardless of the conductivity of the mud so as to obtain a mud-independent reference signal in single-well ranging.