Abstract: A fluid monitoring system includes at least one injection wellbore formed from a terranean surface into a subterranean formation; a fluid injection assembly configured to circulate a fluid through the at least one injection wellbore and into the subterranean formation; at least one monitor wellbore formed from the terranean surface into or near the subterranean formation, where the at least one monitor wellbore is separated from the at least one injection wellbore by the subterranean formation; at least one acoustic energy source positioned in the at least one monitor wellbore and configured to emit acoustic energy from the at least one monitor wellbore into the subterranean formation; and at least one acoustic energy receiver positioned in the at least one monitor wellbore and configured to receive acoustic energy reflected from the fluid circulated into the subterranean formation to the at least one acoustic energy receiver.

Abstract: A computer implemented method that enables drill bit source focusing is described. The method includes obtaining, using at least one hardware processor, correlated drill bit gathers comprising a direct arrival from a downhole source to surface receivers; identifying, using the at least one hardware processor, at least one window around first breaks in the correlated drill bit gathers captured by the surface receivers, wherein the first breaks are isolated/bounded the at least one window; redatuming, using the at least one hardware processor, seismic data within the at least one window captured by respective surface receivers to generate source images; and generating, using the at least one hardware processor, a seismic migration image by multiplying the generated source images.

Abstract: A system for measuring a thickness of a cooling plate, including a probe holder unit designed to fit inside a coolant channel of the cooling plate, the probe holder unit having a housing extending along a length axis, an ultrasonic probe being arranged in the housing to be able to transmit and receive ultrasonic waves from a sensor side, a rear housing part being moveably arranged at the rear side, transversally to the length axis, and elastically biased away from the sensor side, thereby permitting the probe holder unit to adapt to the cooling channel size, a drive chain to assist the progression of the probe holder unit through the length of the coolant channel, the drive chain linked to first connecting means at the first end of the housing, where a cable assembly includes electric wires connects the ultrasound probe, and an encoder arrangement is configured to cooperate with the drive chain such as to measure a length of drive chain passing along it, the encoder arrangement having a first gear meshing wit

Abstract: An ultrasonic transceiver device and a control method thereof are disclosed. The ultrasonic transceiver device includes a plurality of coupled ultrasonic transceiver units. Each of the ultrasonic transceiver units includes a plurality of ultrasonic oscillators, a driving bias circuit coupled to the ultrasonic oscillators and used to receive an alternating current (AC) voltage, and a switching circuit coupled to the driving bias circuit. The switching circuit has a plurality of switching paths corresponding to a plurality of impedance values or a plurality of inductance values. The switching circuit is used to switch a system driving signal to pass through one of the switching paths according to a mode selection signal and transmitted to the driving bias circuit as the AC voltage.

Abstract: Example methods and systems for near-surface characterization through passive monitoring of rig-generated noise are disclosed. One example method includes positioning a distributed acoustic sensing (DAS) cable in a spiral configuration layout around a drilling rig, where the drilling rig includes one or more pieces of drilling rig equipment, and the DAS cable includes a fiber-optic cable. The DAS cable is interrogated using multiple distributed fiber-optic sensing (DFOS) laser pulses during a drilling operation of the drilling rig. Multiple backscattered laser pulses are received from the DAS cable after the DAS cable is interrogated using the multiple DFOS laser pulses. A respective location of each of one or more anomalies in sub-terrain around the drilling rig is determined based on the multiple backscattered laser pulses.

Abstract: Aspects of the subject technology relate to downhole sensing system are disclosed. The system has a first collar configured to accept a receiver, a second collar configured to accept a transmitter; and an acoustic isolator disposed between the first collar and the second collar. The acoustic isolator has a tubular body with a generally smooth exterior surface and an interior surface with a plurality of circumferential grooves formed in the interior surface that modify the acoustic impedance of the tubular body, thereby attenuating an acoustic signal passing through the tubular body.

Abstract: Provided is a transducer apparatus that includes: a main body capable of transmitting and receiving ultrasound; and an exterior attachment attached to a transmission/reception portion of the main body. The exterior attachment includes a first portion, which is disposed so as to come into contact with a leading end of the transmission/reception portion, and a second portion, which is disposed with a distance from the transmission/reception portion.

Abstract: The invention relates to a method for obtaining a position of a sound source relative to a dedicated reference point. A first and a plurality of second sound signals are recorded which are synchronized in time. The position can be obtained by applying an estimated filter to a correlated signal derived by correlation of the first sound signal with at least one of the plurality of second sound signals in the frequency domain. Two timing values are derived in the at least one filtered and correlated signal exceeding a dedicated threshold in the time domain. Then the distance between the dedicated reference point and the sound source based on the respective obtained first timing value and second timing value.

Abstract: This application provides a method for directing a user and an electronic device. A first electronic device exchanges an ultrasonic signal with a second electronic device, and the first electronic device outputs a directing signal according to the ultrasonic signal and angle information between the two devices, to guide user to search for the second electronic device. The first electronic device and the second electronic device do not need to be installed with a UWB chip, thereby reducing costs.

Abstract: A method can include receiving seismic survey data of a subsurface environment from a seismic survey utilizing water bed receivers, where each of the receivers includes a clock; assessing one or more clock calibration criteria; based on the assessing, selecting a clock drift processor for processing at least a portion of the seismic survey data from a plurality of different clock drift processors; using at least the clock drift processor, performing a simultaneous inversion for values of model-based parameters; and, using at least a portion of the values, generating processed seismic survey data that represents one or more geological interfaces in the subsurface environment.

Abstract: In general, in one aspect, embodiments relate to a method and/or system that includes disposing a cement bond logging tool into a wellbore. The method and/or system comprising: a cement bond logging tool comprising: two or more transmitters configured to transmit an acoustic wave from cement bond logging tool; and an array of receivers configured to receive a refracted waveform; and an information handling system configured to process the refracted waveform from the array of receivers into a cement bond property log.

Abstract: An acoustic element integrated circuit includes cells, being arrayed two-dimensionally on a same curved surface, wherein capacitive acoustic-elements having vibration membranes are allocated by unit number in each of the cells. Each of the cells encompasses an intra-cell circuit, which includes an exciting circuit for driving collectively portions by the unit number, the portions having transmitting functions of the acoustic-elements, and a reception circuit for processing collectively received signals transferred from portions by the unit number, the portions having reception functions in the acoustic-elements. Here, the exciting circuits are sorted into a chip in which high-voltage drivers for exciting the vibration membranes are merged and a chip in which circuits operated at voltages lower than the high-voltage drivers are merged, and the cells are operated two-dimensionally, by individually controlling the intra-cell circuits so that cells can be driven independently.

Abstract: A system and method for creating ultrasound images of a moving medium is provided. The method includes receiving a first plurality of ultrasound wave signals obtained from the moving medium; generating an initial estimated model of a morphing function for the motion of the moving medium, wherein the motion of the moving medium is determined based on at least one received signal of the plurality of first received signals, wherein the morphing function defines morphing of the moving medium from a plurality of received signals; performing a wave inversion by using at least the estimated morphing function; and, generating an ultrasound image based on at least the model of the morphing function subsequent to the wave inversion. In an embodiment, a plurality of ultrasound emitters emit ultrasound wave signals that result in the first plurality of ultrasound wave signals.

Abstract: A transducer device of a wearable object or as a wearable object as such, includes means for generating a first action in a first operating mode related to a specific function of the wearable object under the control of a processor or microcontroller processing unit of an electronic circuit being powered by a DC voltage source. The means for generating is configured to generate a second communication action in a second operating mode different from the first operating mode so as to obtain a dual-mode transducer device. The second operating mode allows information or data communication signals to be communicated mainly to the outside of the transducer device so that it can be detected by a monitoring unit of a monitoring system, is able to establish communication, and can receive data or parameter signals from another transducer device. The communication signals are ultrasonic signals transmitted into a water body.

Abstract: Methods and systems are disclosed for employing an ultrasonic sensor to estimate a range for a moving object. At least one processor separates returned signals received by an ultrasonic transducer into a stationary object signal and a moving object signal. A gain is determined based at least in part on the stationary object signal. The stationary object signal is combined with the moving object signal using the gain and then filtered. The range for the moving object is estimated using the filtered combined stationary and moving object signal.

Abstract: Provided is a method for judging geology of a time-delayed extremely intense rockburst as to deep tunnel engineering. Information about geological structures is recorded according to methods such as geological mapping and advanced geological prediction of the tunnel face. Geometric characteristics of burst craters formed during the rockburst are recorded by utilizing advanced geological drilling and profile scanning technologies in a rockburst-damaged zone. 3D geostress in the rockburst-damaged zone is measured by using a stress relief method or a hydraulic fracturing method to determine the orientation of the maximum principal stress. A 3D numerical calculation model is established based on initial geostress testing results and physical and mechanical parameters of rock and structural discontinuities obtained through on-site geological investigations.

Abstract: A system and method for designing a seismic survey including selecting a seismic survey grid as a basis for a seismic survey design and looping through the steps of generating off-the-grid locations by imposing spatial or temporal constraints on on-the-grid locations, mapping the off-the-grid locations from a physical domain to a pre-selected domain by applying a multidimensional transform to the off-the-grid locations, mapping the pre-selected domain to a rank-revealing domain using a pre-selected operator, applying a pre-selected process to minimize a rank of the off-the-grid locations in the pre-selected domain, and updating the seismic survey design based on which of the off-the-grid locations has the minimum rank until a pre-selected threshold is met indicating an optimal seismic survey design. The system and method include acquiring seismic data using the optimal seismic survey design, and enabling performing a wellsite action based at least on the seismic data.

Abstract: An ultrasonic probe lens comprising a lens body comprising a solid material extending outward from an optical lens axis to a periphery, an inner surface of the lens body, and an outer surface of the lens body. A thickness of the lens body as measured from the inner surface to the outer surface varies from an optical lens axis to the periphery such that the lens body is configured with an inner optical profile and an outer optical profile to phase modulate the ultrasonic waves incident upon the lens body to reduce reverberations.

Abstract: The present invention relates to a method and device for analysing a medium based on: —emitting plane or spiral emission waves (Oinc1) each having a respective emission angle, —receiving reception signals representative of plane or spiral reception waves (Orec1) each having a respective reception angle, each reception signal including a singly scattered component and a multiply scattered component, —processing the reception signals to extract the singly scattered component and/or the multiply scattered component of said reception signals.

Abstract: A flexible transducer designed with high volume manufacturing in mind is described, the where flexible transducer mount can be panelized into a grid form and the transducers assembled into the grid using commercially available pick-and-place tools. Once assembled, the mounted transducers may be attached to circuit boards using surface mount processes such as solder reflow or adhesive bonding via the electrical contacts on the underside of the flexible transducer mount. Further, maximization of the oscillating internal surface area that contributes to the acoustic pressure for a given transducer footprint area is described, which leads to greater packing density of transducers when used in an ultrasonic array. The greater packing density and pressure generated by the transducer aids with the miniaturization and cost reduction of mid-air haptic technology.