Abrégé

233 guided Lamb modes in the received signals in said identified zones.

Classes IPC  ?

• G01N 29/04 - Analyse de solides
• G01N 29/06 - Visualisation de l'intérieur, p.ex. microscopie acoustique
• G01N 29/11 - Analyse de solides en mesurant l'atténuation des ondes acoustiques
• G01N 29/34 - Génération des ondes ultrasonores, sonores ou infrasonores
• G01N 29/38 - Détection du signal de réponse par filtrage temporel, p.ex. en utilisant des fenêtres temporelles
• G01N 29/42 - Détection du signal de réponse par filtrage en fréquence
• G01N 29/44 - Traitement du signal de réponse détecté

Abrégé

3 guided Lamb modes in the received signals in the identified zones.

Classes IPC  ?

• G01N 29/04 - Analyse de solides
• E21B 47/107 - Localisation des fuites, intrusions ou mouvements du fluide utilisant des moyens acoustiques

Abrégé

It is disclosed a method and device for testing a plate material (1) for the presence of pits and holes (3), said method including the steps of; transmitting an acoustical signal from a transmitting transducer (2) facing the plate material (1) and positioned in a distance from the plate material, the frequency of the transmitted signal and the angle of incidence of the signal towards the plate material being adapted to promote the formation of Lamb signals in the plate material, receiving an acoustical signal returned from the plate material in a receiving transducer (4) also facing the plate material: at a distance from the material, the receiving transducer (4) being located in a distance from said transmitting transducer (2) along the direction of the plate material, time gating the received signal identifying a tail part (8) carrying information from Lamb signals travelling In the material, and determining the energy content in said Lamb mode part of the signal.

Classes IPC  ?

• G01N 29/12 - Analyse de solides en mesurant la fréquence ou la résonance des ondes acoustiques
• G01N 29/38 - Détection du signal de réponse par filtrage temporel, p.ex. en utilisant des fenêtres temporelles

Abrégé

2,2) and a reception of said acoustical signal from other transducers in said array surrounding the first transducer, the controller further being adapted to determine the direction to a flaw in the wall of said pipeline from the received acoustical signals.

Classes IPC  ?

• G01N 29/34 - Génération des ondes ultrasonores, sonores ou infrasonores
• G01N 29/26 - Dispositions pour l'orientation ou le balayage
• G01N 29/12 - Analyse de solides en mesurant la fréquence ou la résonance des ondes acoustiques
• G01N 29/04 - Analyse de solides
• G01N 29/24 - Sondes
• G01N 29/44 - Traitement du signal de réponse détecté

Abrégé

1). A processing unit (3) is connected to said transmitter and receivers, the processing unit being adapted to measure the travel time of an acoustical signal propagating between two receivers in the wall (i) and determine the pressure inside the pipe or container from said travel time.

Classes IPC  ?

• G01L 11/04 - Mesure de la pression permanente, ou quasi permanente d'un fluide ou d'un matériau solide fluent par des moyens non prévus dans les groupes ou par des moyens acoustiques

Abrégé

It is described an apparatus for inspecting a pipeline, said apparatus including a cylindrical body (15) adapted to be transported inside said pipeline, an array of acoustical transducers (Tx, y) installed in the surface of the cylindrical body (15), the acoustical transducers being organized in columns and rows in a belt around the cylindrical body, a controller adapted to initiate a transmission of an acoustical signal from a first transducer (T2, 2) and a reception of said acoustical signal from other transducers in said array surrounding the first transducer, the controller further being adapted to determine the direction to a flaw in the wall of said pipeline from the received acoustical signals.

Classes IPC  ?

• G01N 29/26 - Dispositions pour l'orientation ou le balayage

Abrégé

An apparatus and method for measuring the internal pressure of a pipe or container is disclosed. The apparatus includes an acoustical transmitter (Tx1) mounted on a wall (1) of said pipe or container and a signal generator (2) connected to said transmitter and which is adapted to provide a signal to the transmitter. The signal from the transmitter is detected by two receivers (Rx1, Rx2) mounted on said pipe or container in a distance from said transmitter (Tx1). A processing unit (3) is connected to said transmitter and receivers, the processing unit being adapted to measure the travel time of an acoustical signal propagating between two receivers in the wall (i) and determine the pressure inside the pipe or container from said travel time.

Classes IPC  ?

• G01L 11/04 - Mesure de la pression permanente, ou quasi permanente d'un fluide ou d'un matériau solide fluent par des moyens non prévus dans les groupes ou par des moyens acoustiques

Abrégé

An apparatus and method for measuring the internal pressure of a pipe or container is disclosed. The apparatus includes an acoustical transmitter (Tx1) mounted on a wall (1) of said pipe or container and a signal generator (2) connected to said transmitter and which is adapted to provide a signal to the transmitter. The signal from the transmitter is detected by two receivers (Rx1, Rx2) mounted on said pipe or container in a distance from said transmitter (Tx1). A processing unit (3) is connected to said transmitter and receivers, the processing unit being adapted to measure the travel time of an acoustical signal propagating between two receivers in the wall (i) and determine the pressure inside the pipe or container from said travel time.

Classes IPC  ?

• G01L 11/04 - Mesure de la pression permanente, ou quasi permanente d'un fluide ou d'un matériau solide fluent par des moyens non prévus dans les groupes ou par des moyens acoustiques

Abrégé

The invention relates to a downhole tool assembly (1) for carrying out downhole operations in a casing (130) in a wellbore, the tool assembly (1) comprising: i) at least a first tool (300) configured for carrying out said downhole operations, and ii) a second tool (100) mechanically coupled to the first tool (200, 300, 400, 500) in a non-rotatable manner. The second tool being configured for measuring properties of the casing (130), such as casing (130) wall thickness, casing internal diameter, thickness of scale within casing (130), and cement bonding/disbonding, by means of acoustic resonance technology and processing the received acoustic signal. The second tool (100) comprises a plurality of ultrasonic transducers (110, 124) for measuring said properties, wherein the ultrasonic transducers (110, 124) are fixedly provided all around the circumference of the second tool (100), wherein the ultrasonic transducers (110, 124) are configured for measurement of said properties along the full circumference of the casing (130) simultaneously without requiring rotation of the second tool (100). The invention provides an improved apparatus for downhole measurements, which is capable of carrying out downhole operations combined with in-situ downhole diagnostics of a casing, in parallel with said downhole measurements.

Classes IPC  ?

• E21B 47/00 - Relevés dans les trous de forage ou dans les puits
• G01V 1/46 - Acquisition des données

Abrégé

An acoustic apparatus adapted to operate in a gas filled space from a first side of an object to be measured for making a non-contact thickness measurement thereof includes an electro acoustic transducer, a transceiver coupled with the electro acoustic transducer and adapted to excite electro acoustic transducer to output an acoustic signal towards the object to be measured and receive an acoustic response signal therefrom, and a signal processor adapted to process the response signal and determine a thickness of the object. The electroacoustic transducer has a transducer-to-gas acoustic interface, and the transceiver is adapted to operate the electroacoustic transducer so as to emit into a gas filled gap an acoustic broad band pulse towards the object and to receive an acoustic resonance response signal in the acoustic response signal at a level that allows acquisition of the resonance response signal above a predetermined signal to noise level.

Classes IPC  ?

• G01N 29/04 - Analyse de solides

Abrégé

An acoustic method and apparatus detects or characterizes a medium in a structure which may be a container, such as a pipeline for transportation of oil, gas, or hydrocarbon condensate. A pulse of broadband acoustic energy is emitted towards the structure by a first transducer. A return signal is generating by a second transducer from acoustic energy returned from the structure in response to the emission of acoustic energy. A return signal spectrum representing acoustic spectral components of the acoustic energy returned from the structure is derived from the return signal, and the medium is detected or characterized by applying a return signal processing medium detection or characterization algorithm to the return signal spectrum.

Classes IPC  ?

• G01N 29/12 - Analyse de solides en mesurant la fréquence ou la résonance des ondes acoustiques

Abrégé

An acoustic apparatus adapted to operate in a gas filled space for making a non-contact thickness measurement of an object to be measured or for making a non-contact characterisation of a medium located on the opposite side of the object. The apparatus comprises an electro acoustic transceiver to output an acoustic signal towards the object to be measured and receive an acoustic response signal, and a signal processor to process the response signal and to determine the thickness of the object. The transducer has a transducer-to-gas acoustic interface, and is adapted to emit an acoustic broad band pulse towards the object and to receive an acoustic resonance response signal. The signal processor determines the thickness of the object to be measured or makes a characterisation of a medium located on the opposite side of the object using a fast Fourier transformation (FFT) of the resonance response signal above a predetermined signal to noise level.

Classes IPC  ?

• G01B 17/02 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer l'épaisseur
• G01B 17/08 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer la rugosité ou l'irrégularité des surfaces
• G01N 29/12 - Analyse de solides en mesurant la fréquence ou la résonance des ondes acoustiques
• G01N 29/46 - Traitement du signal de réponse détecté par analyse spectrale, p.ex. par analyse de Fourier

Abrégé

An acoustic apparatus adapted to operate in a gas filled space from a first side of an object to be measured for making a non-contact thickness measurement thereof includes an electro acoustic transducer, a transceiver coupled with the electro acoustic transducer and adapted to excite electro acoustic transducer to output an acoustic signal towards the object to be measured and receive an acoustic response signal therefrom, and a signal processor adapted to process the response signal and determine a thickness of the object. The electroacoustic transducer has a transducer-to-gas acoustic interface, and the transceiver is adapted to operate the electroacoustic transducer so as to emit into a gas filled gap an acoustic broad band pulse towards the object and to receive an acoustic resonance response signal in the acoustic response signal at a level that allows acquisition of the resonance response signal above a predetermined signal to noise level.

Classes IPC  ?

• G01N 29/04 - Analyse de solides

Abrégé

An apparatus and a method for determining a moisture ingress in an insulating layer surrounding a pipe, the insulating layer being surrounded by a tubular jacket. The apparatus includes an acoustic transducer in communication with an exciter adapted to provide a brief and broad banded acoustic signal which includes frequencies which by their propagation in the material of the jacket has a wavelength which corresponds to twice the thickness of the jacket or an odd multiple of twice the thickness of the jacket, and to process a reverberation signal emitted from the jacket in response to sending into the jacket the brief and broad banded output signal from the transducer. The signal processor is adapted to make a frequency analysis of the received reverberation signal for producing a frequency response curve, to establish features of the frequency response curve which are characteristic of a moisture content in the insulation material on the inside of the jacket, and to output an indication being specific for the moisture ingress.

Classes IPC  ?

• G01M 3/04 - Examen de l'étanchéité des structures ou ouvrages vis-à-vis d'un fluide par utilisation d'un fluide ou en faisant le vide par détection de la présence du fluide à l'emplacement de la fuite

Abrégé

An acoustic method and apparatus for detection or characterization of a medium comprised in a structure. Typically, the structure is a container, such as e.g. a pipe line for transportation of oil, gas or hydrocarbon condensate. A pulse of broad banded acoustic energy is emitted towards said structure by a first transducer means. A return signal is generating by a second transducer means from acoustic energy returned from said structure in response to said emitting. A return signal spectrum representing acoustic spectral components of said acoustic energy returned from said structure is derived from said return signal, and said medium is detected or characterized by applying a return signal processing medium detection or charaterization algorithm to said return signal spectrum.

Classes IPC  ?

• G01N 29/02 - Analyse de fluides
• G01N 29/44 - Traitement du signal de réponse détecté