Abstract: A method for synchronizing signals among transmitters and receivers of a logging tool positioned in a borehole is provided. Measurement signals generated from operating a transmitter in the borehole are acquired by a receiver. An operating frequency of the receiver is determined by a processing unit. The operating frequency of the receiver is different from an operating frequency of the transmitter. A sampling frequency of the receiver is determined based on the determined operating frequency. A phase delay of the receiver is determined by the processing unit. The acquired measurement signals are adjusted by the processing unit based on the determined sampling frequency and the phase delay of the receiver.

Abstract: The present disclosure is directed to small cell poles that are configured for use in urban environments. In various implementations, the small cell poles have a configuration similar to existing utility poles, which minimizes their aesthetic obtrusiveness. In order to reduce the size of an antenna structure of such a small cell pole, implementations utilizes antennas that are vertically stacked, which permits an antenna structure of a small cell pole to have a reduced width. In various implementations, one or more antennas are vertically stacked within a spatial envelope of a pole. For instance, one or more antennas may be disposed within the interior of a pole such that a resulting cell ole is similar in appearance to a utility pole.

Abstract: A modular downhole logging system includes a transmitter module having a local frequency, wherein the transmitter module transmits interrogation signals into a formation based on the local frequency. The downhole system also includes a receiver module axially-spaced from the transmitter module and that receives response signals corresponding to the interrogation signals, wherein the receiver module includes sampling logic and sync estimation logic. The sync estimation logic is configured to perform sync estimation operations including estimating the local frequency of the transmitter module based on analysis of response signal Fourier transform results corresponding to different frequencies. The sampling logic/clock is configured to sample the response signals based on the estimated local frequency of the transmitter module, wherein a processor derives formation property values using the sampled response signals.

Abstract: A bottom hole assembly includes a single wire bus, a legacy sensor coupled to the single wire bus, and at least one high frequency communication sensor coupled to the single wire bus. The high frequency communication sensor injects a high frequency signal alternating between high frequency synchronization pulses and high frequency data signals onto the single wire bus. A first high frequency pass filter coupled between the at least one high frequency communication sensor and the single wire bus is also included. The high frequency pass filter passes the high frequency signal to the single wire bus from the high frequency communication sensor. The bottom hole assembly includes a first high frequency blocking filter coupled between the legacy sensor and the single wire bus. The high frequency blocking filter blocks the high frequency signal from the high frequency communication sensor from disturbing a legacy signal at the legacy sensor.

Abstract: A bottom hole assembly includes a single wire bus, a legacy sensor coupled to the single wire bus, and at least one high frequency communication sensor coupled to the single wire bus. The high frequency communication sensor injects a high frequency signal alternating between high frequency synchronization pulses and high frequency data signals onto the single wire bus. A first high frequency pass filter coupled between the at least one high frequency communication sensor and the single wire bus is also included. The high frequency pass filter passes the high frequency signal to the single wire bus from the high frequency communication sensor. The bottom hole assembly includes a first high frequency blocking filter coupled between the legacy sensor and the single wire bus. The high frequency blocking filter blocks the high frequency signal from the high frequency communication sensor from disturbing a legacy signal at the legacy sensor.

Abstract: A method for synchronizing signals among transmitters and receivers of a logging tool positioned in a borehole is provided. Measurement signals generated from operating a transmitter in the borehole are acquired by a receiver. An operating frequency of the receiver is determined by a processing unit. The operating frequency of the receiver is different from an operating frequency of the transmitter. A sampling frequency of the receiver is determined based on the determined operating frequency. A phase delay of the receiver is determined by the processing unit. The acquired measurement signals are adjusted by the processing unit based on the determined sampling frequency and the phase delay of the receiver.

Abstract: The present disclosure is directed to small cell poles that are configured for use in urban environments. In various implementations, the small cell poles have a configuration similar to existing utility poles, which minimizes their aesthetic obtrusiveness. In order to reduce the size of an antenna structure of such a small cell pole, implementations utilizes antennas that are vertically stacked, which permits an antenna structure of a small cell pole to have a reduced width. In various implementations, one or more antennas are vertically stacked within a spatial envelope of a pole. For instance, one or more antennas may be disposed within the interior of a pole such that a resulting cell ole is similar in appearance to a utility pole.

Abstract: A logging tool and a method for in-situ, independent calibration of receiver amplifier electronics separately from transmitter electronics. A logging tool can perform in-situ gain and phase calibration on one or more receiver assemblies, each consisting of at least a receiver amplifier electronics and a receiver antenna, and based on a calculated gain and phase of the receiver assembly, determine the true antenna amplitude and phase associated with a measurement made by the receiver assembly. The logging tool can perform in-situ crosstalk measurement and calibration, by determining a crosstalk matrix for all of the receiver assemblies and for each receiver assembly, removing the crosstalk interference from the measurement made by the receiver assembly.

Abstract: A bottom hole assembly includes a single wire bus, a legacy sensor coupled to the single wire bus, and at least one high frequency communication sensor coupled to the single wire bus. The high frequency communication sensor injects a high frequency signal alternating between high frequency synchronization pulses and high frequency data signals onto the single wire bus. A first high frequency pass filter coupled between the at least one high frequency communication sensor and the single wire bus is also included. The high frequency pass filter passes the high frequency signal to the single wire bus from the high frequency communication sensor. The bottom hole assembly includes a first high frequency blocking filter coupled between the legacy sensor and the single wire bus. The high frequency blocking filter blocks the high frequency signal from the high frequency communication sensor from disturbing a legacy signal at the legacy sensor.

Abstract: A drilling system, comprising a drill string; and a ranging tool mounted on the drill string, the ranging tool comprising a magnetic sensor pair comprising a first magnetic sensor and a second magnetic sensor mounted radially opposite one another on the ranging tool, wherein each of the magnetic sensors is structured and configured to detect at least a radial component and a tangential component of a magnetic field; a rotatable assembly, comprising a motor structured and arranged to actuate rotation of the magnetic sensor pair around the drill string; and an electronics package connected to at least one of the magnetic sensor pair, and the motor, wherein the electronics package comprises a controller and a wireless telemetry device.

Abstract: A method of fabricating a ferrite for use in a resistivity logging tool includes mixing a ferrite powder with a binder to provide a mixture, and pressing the mixture into a mold to form the ferrite. The mold exhibits a specific geometry corresponding to a channel defined on an inner surface of a bobbin associated with the resistivity logging tool, and the channel is arcuate and extends at an angle offset from a central axis of the bobbin. At least one of a length, a width, and a thickness of the ferrite is then adjusted to manipulate a magnetic permeability of the ferrite in a direction of a magnetic field passing through the ferrite.

Abstract: A method of fabricating a ferrite for use in a resistivity logging tool includes mixing a ferrite powder with a binder to provide a mixture, and pressing the mixture into a mold to form the ferrite. The mold exhibits a specific geometry corresponding to a channel defined on an inner surface of a bobbin associated with the resistivity logging tool, and the channel is arcuate and extends at an angle offset from a central axis of the bobbin. At least one of a length, a width, and a thickness of the ferrite is then adjusted to manipulate a magnetic permeability of the ferrite in a direction of a magnetic field passing through the ferrite.

Abstract: In some embodiments, an apparatus and a system, as well as methods, include sampling a received signal that represents a downhole signal source, at a sampling frequency and for a sampling duration, to provide a sampled signal. Further activity may comprise detecting a frequency of a component of the sampled signal from inspection of a frequency domain representation of the sampled signal. Further activity may comprise adjusting at least one operating frequency for the downhole tool such that the at least one operating frequency is outside a frequency range from the frequency of the component of the sampled signal. Additional methods, apparatus, and systems are disclosed.

Abstract: The present disclosure is directed to small cell poles that are configured for use in urban environments. In various implementations, the small cell poles have a configuration similar to existing utility poles, which minimizes their aesthetic obtrusiveness. In order to reduce the size of an antenna structure of such a small cell pole, implementations utilizes antennas that are vertically stacked, which permits an antenna structure of a small cell pole to have a reduced width. In various implementations, one or more antennas are vertically stacked within a spatial envelope of a pole. For instance, one or more antennas may be disposed within the interior of a pole such that a resulting cell ole is similar in appearance to a utility pole.

Abstract: An adjustable height system that provides an automatic manner of height adjustment for a platform. The platform is supported by a frame including a scissor lift assembly which raises and lowers the platform to any desirable height. The height is adjusted by activating a portable drive device which is engaged with an adapter element that couples a gearbox to a threaded drive member that actuates the scissor lift assembly. Using the portable drive device in forward or reverse, the platform is respectively raised and lowered.

Abstract: A dynamical physical system of particles represented by input data representing the phase space state of the particles over time is characterised by deriving a feature vector in respect of each particle comprising plural metrics that each describe a change in the phase space state of the particle over time. A classification of particles into plural classes is performed by applying a machine learning technique that operates on the feature vectors of the particles, and outputting classification data representing the classification.

Abstract: Machine learning is performed on input data representing a dynamical statistical system of entities having plural primary variables that vary time. A distribution function over time of the density of entities in a phase space, whose dimensions are the primary variables and secondary variables dependent on the rate of change of the primary variables, is derived and encoded as a sum of contour functions over time describing the contour in phase space of plural phaseons which are entities of a model of the dynamical statistical system that are localised in the phase space. Machine learning is performed on the encoded distribution function and/or at least one field in the effective configuration space whose dimensions are the primary variables, derived from the encoded distribution function. The encoding of the distribution function provides a representation which improves the performance of the machine learning techniques by simplifying hyperparameter optimisation.

Abstract: A system comprises a set piece, a threaded block, and a nut and is configured to support a panel in a railing system. The set piece comprises a block portion and a base portion. The block portion has a first planar surface and an opposing, second planar surface. The base portion is planar and extends from an edge of the block portion substantially perpendicular to the first and second surfaces of the block portion and away from the first surface of the block portion. The threaded block comprises a base and an extended circular portion. The circular portion comprises a threaded surface on the circumference, and the threaded block is configured to align with the set piece. The nut is configured to engage the threaded block. The nut comprises a corresponding threaded internal circular surface to rotatably engage the extended circular portion and move orthogonal to the threaded block base.

Abstract: A method of fabricating a ferrite for use in a resistivity logging tool includes mixing a ferrite powder with a binder to provide a mixture, and pressing the mixture into a mold to form the ferrite. The mold exhibits a specific geometry corresponding to a channel defined on an inner surface of a bobbin associated with the resistivity logging tool, and the channel is arcuate and extends at an angle offset from a central axis of the bobbin. At least one of a length, a width, and a thickness of the ferrite is then adjusted to manipulate a magnetic permeability of the ferrite in a direction of a magnetic field passing through the ferrite.

Abstract: A probe assembly for performing electromagnetic (EM) field mapping around an antenna, the probe assembly comprising a probe head base and three coils wrapped around the base and oriented in different directions. An EM field mapping apparatus to acquire multicomponent EM field measurements comprised of a non-metallic/non-magnetic frame, a set of linear motion actuators, a probe, a sensor, and a controller. An EM logging method that comprises constructing an EM logging tool having one or more antennas, mapping an EM field pattern for each of the one or more antennas, deriving an EM logging tool model, obtaining measurements using the EM logging tool, and inverting/transforming the measurements using the EM logging tool model to obtain the estimated formation.