摘要:
A downhole tool having a transmitter array with azimuthally spaced transmitters and receiver arrays with azimuthally spaced receivers. Methods of operation include transmitting an acoustic signal from an individual one of the transmitters, sensing an attribute of the acoustic signal with the receivers, and evaluating a characteristic of a portion of a downhole feature based on response signals generated by the first and second receivers. Each response signal is indicative of the acoustic signal attribute sensed by the corresponding receivers. This is repeated with different individual ones of the transmitters and receivers until the evaluated portions of the downhole feature collectively extend around a wellbore.
摘要:
A measuring device for measuring a hole in the ground having at least one measuring probe having at least one measurement signal transmitter to transmit a measurement signal, at least one measurement signal receiver to receive the measurement signal reflected on a wall area of the hole, and an evaluation unit for determining a wall distance between the measurement signal transmitter and the wall area of the hole, wherein a measuring distance based on an assignment rule can be assigned to the received, reflected measurement signal. A calibrating device having at least one calibration element. The measurement signal transmitter transmits a calibration signal, which can be reflected on the calibration element, wherein the measurement signal receiver receives the calibration signal reflected on the calibration element. The evaluation unit changes and calibrates the assignment rule based on the calibration signal reflected and received by the calibration element.
摘要:
A tool for evaluating the internal surfaces of tubular is provided, wherein one or more arms extend outwardly from the tool into contact with an inner wall of the tubular, and changes in the dimensions or condition of the inner wall result in changes in the position of the ends of the arms relative to the tool. This motion is converted, through an electromagnetic transducer, into an electrical signal, the accuracy of which deteriorates as the temperature of the tool changes. Calibration transducers are provided on the tool to provide correction factors to convert the electromagnetic transducer output into an accurate reading of the distance of the end of the arms from the tool thereby increasing the accuracy of the assessment of the inner wall of the tubular.
摘要:
This invention relates to a method of correcting eccentricity of ultrasonic image profiles, measured along a section of rock, including the steps of measuring emitted amplitude values (A0) and measuring transit time values (tθ) of ultrasonic acoustic pulses emitted at a range of default angles (θ), where the amplitude measured at each angle (Aθ) is determined by an amplitude decay model in relation to the transit time (tθ) defined by A θ=Aθ·etθ/τ·Iθ, where τ is the decay correction factor; and Iθ is the reflection coefficient of the rock wall.
摘要:
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.
摘要:
An apparatus and methods for inspecting pipes which may comprise a body attached to a tether for movement in a pipe. The body may comprises at least a transmitter coil and a receiver coil. The receiver coil may be disposed between at least two transmitter coils. The apparatus may also include a circuit for energizing the transmitter coil with a pulsed electromagnetic source and a circuit for receiving and processing a signal from the receiver coil. Methods include inserting an inspection device into a pipe and energizing transmitter coils. A magnetic flux is emitted from the transmitter coils. The method also includes inducing an eddy current within a pipe wall and measuring the electromagnetic flux induced in a receiver coil by the eddy current within the pipe wall.
摘要:
An inspection system to measure the condition of at least the wall of a ground opening, such as a borehole opening, an excavation, and a slurry wall, the inspection system comprising a head unit configured to be lowered into an associated borehole and having a lowering mount configured to be operably and selectively joined to an associated lowering unit to facilitate the lowering of the head unit into the associated borehole during a data collection phase, the data collection phase including at least one of a lowering phase wherein the head unit is lowered in the associated borehole toward an associated bottom extent of the borehole by the associated lowering unit and a raising phase wherein the head unit is raised in the associated borehole away from the associated bottom extent, at least one set of test data being collected concerning one or more physical characteristics of the associated borehole during the data collection phase, the head unit comprising an internal measurement system and a sensor arrangement having a plurality of sensors facing radially outwardly of a head axis that is generally parallel to at least a portion of the an associated borehole axis, the plurality of sensors allowing the head unit to be moved during the data collection phase without rotation about the head axis, the plurality of sensors at least partially producing the at least one set of test data collected during the data collection phase.
摘要:
An apparatus for characterizing objects in the bore of a well assembly is provided. In one embodiment, the apparatus includes a sensing array including ultrasonic transducers and a data analyzer coupled to receive input from the sensing array. The sensing array is positioned to transmit ultrasonic waves into the bore of a well assembly and to receive ultrasonic waves from the bore. The data analyzer processes data representative of ultrasonic waves received by the sensing array to identify a location of a component in the bore. Additional systems, devices, and methods are also disclosed.
摘要:
A pipe inspection tool includes a body having a central axis, and one or more azimuthal antenna arrays operatively coupled to the body. Each azimuthal antenna array includes a plurality of antenna coils arranged circumferentially about the central axis and comprising an azimuthal array of z-coils or an azimuthal array of separated x-coils and separated y-coils. The separated x-coils are oriented in a first direction with respect to the central axis, the separated y-coils are oriented in a second direction with respect to the central axis, and the z-coils are oriented in a third direction with respect to the central axis. The second direction is orthogonal to the first direction, and the third direction is orthogonal to both the first and second directions.
摘要:
Systems and methods process a measured ultrasonic response waveform to determine a well casing thickness and an acoustic impedance of a sealing medium surrounding the well casing. An array of simulated response waveforms corresponding to a set of candidate acoustic impedances for the sealing medium surrounding the well casing and a set of candidate well casing thicknesses is generated. A simulated response waveform from the array of simulated response waveforms is identified that best matches the measured response waveform so as to determine the sealing medium acoustic impedance.