40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
Produits et services
Custom manufacture of piezoelectric ultrasound transducers and ceramic crystals for vibration monitoring, imaging arrays [ , and weather radar probes ] ; custom manufacture of piezoelectric ultrasound transducers and ceramic crystals for industrial and process controls, and the biotech, pharmaceutical, [ automotive, ] marine, aerospace [ , and consumer ] industries
Among other things, there are disclosed embodiments of a well-logging tool that inspects features of the down-hole environment using ultrasonic signals with a frequency in the range of 3-5 MHz. The ultrasonic signals are encoded, and their time-of-flight and amplitude provide information on features of interior surface of the casing on the order of 1 mm, and on the quality of the cement bond behind the casing.
E21B 47/00 - Relevés dans les trous de forage ou dans les puits
G01V 1/44 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées au carottage en utilisant des générateurs et des récepteurs situés dans le même puits
3.
Ultrasonic identification of replaceable component for host system
A system, method and device are provided for detecting the presence of, and/or obtain information about, a replaceable component for a host system. A host system has an ultrasonic transducer or transducer pair that detects the presence of, and/or obtains information about, a replaceable component for a host system through receipt or non-receipt of an ultrasonic signal. The replaceable component includes a key or other feature that either allows the transmission or reflection of a transmitted ultrasonic signal, or which does not allow the reception or reflection of the transmitted ultrasonic signal, depending on the host configuration.
G06K 19/06 - Supports d'enregistrement pour utilisation avec des machines et avec au moins une partie prévue pour supporter des marques numériques caractérisés par le genre de marque numérique, p. ex. forme, nature, code
G06K 7/02 - Méthodes ou dispositions pour la lecture de supports d'enregistrement avec des moyens pneumatiques ou hydrauliques, p. ex. lecture de perforations à l'air compriméMéthodes ou dispositions pour la lecture de supports d'enregistrement avec des moyens acoustiques
G06K 7/04 - Méthodes ou dispositions pour la lecture de supports d'enregistrement avec des moyens mécaniques, p. ex. avec des aiguilles actionnant des contacts électriques
G05B 19/12 - Commande à programme autre que la commande numérique, c.-à-d. dans des automatismes à séquence ou dans des automates à logique utilisant des supports d'enregistrement
A61M 5/142 - Perfusion sous pression, p. ex. utilisant des pompes
4.
Enhanced bandwidth transducer method for well integrity measurement
A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The critically damped present acoustic stack utilizes a plurality of stacked acoustic elements such as piezoelectric ceramics that are energized in two manners, providing different center frequencies, each producing a respective center frequency of 100% bandwidth to yield an acoustic stack having a total bandwidth exceeding the bandwidth of an acoustic element or the bandwidth of the plurality of acoustic elements. One manner of energizing is to pulse only one of the acoustic elements. The other manner is to pulse a first acoustic element then pulse a second acoustic element after a delay equal to the amount of time it takes for the first pulse to reach the face of the second acoustic element. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.
H01L 41/09 - Eléments piézo-électriques ou électrostrictifs à entrée électrique et sortie mécanique
G10K 11/00 - Procédés ou dispositifs pour transmettre, conduire ou diriger le son en généralProcédés ou dispositifs de protection contre le bruit ou les autres ondes acoustiques ou pour amortir ceux-ci, en général
E21B 47/00 - Relevés dans les trous de forage ou dans les puits
H01L 41/083 - Eléments piézo-électriques ou électrostrictifs avec une structure empilée ou multicouche
G01B 17/02 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer l'épaisseur
H04B 11/00 - Systèmes de transmission utilisant des ondes ultrasonores, sonores ou infrasonores
B06B 1/06 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique fonctionnant par effet piézo-électrique ou par électrostriction
E21B 47/09 - Localisation ou détermination de la position d'objets dans les trous de forage ou dans les puitsIdentification des parties libres ou bloquées des tubes
E21B 47/16 - Moyens pour la transmission de signaux de mesure ou signaux de commande du puits vers la surface, ou de la surface vers le puits, p. ex. pour la diagraphie pendant le forage utilisant des ondes acoustiques le long du train de tiges ou du tubage
Among other things, there are disclosed embodiments of devices, suitable for incorporation into well-logging tools, for the in situ measurement of the acoustic impedance of a fluid in the well bore, such as drilling mud. The device includes a sonic emitter that emits sonic pulses into a solid probe. The pulses are partially transmitted and partially reflected at opposite surfaces, and the decay of the amplitude of successive sonic pulses is used to determine the acoustic impedance of the fluid.
G01V 1/44 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées au carottage en utilisant des générateurs et des récepteurs situés dans le même puits
A system, method and device are provided for detecting the presence of and/or obtain information about, a replaceable component for a host system. A host system has an ultrasonic transducer pair that detects the presence of, and/or obtains information about a replaceable component for a host system through receipt or non- receipt of an ultrasonic signal. The replaceable component includes a key or other feature that either allows the transmission of a transmitted ultrasonic signal, or which does not allow the reception of the transmitted ultrasonic signal depending on the host configuration.
G06K 7/04 - Méthodes ou dispositions pour la lecture de supports d'enregistrement avec des moyens mécaniques, p. ex. avec des aiguilles actionnant des contacts électriques
Low frequency pulse-echo ultrasonic transducers are provided especially suited for use in downhole cement bond evaluation, but usable for various applications. One frequency pulse-echo ultrasonic transducer comprises a transducer stack having alternating layers of a piezoceramic element and an ultrasonic attenuating element that is preferably acoustic impedance matched to the piezoceraniic elements in order to reduce the Q of the transducer stack. Another low frequency pulse-echo ultrasonic transducer comprises an assembly having the present transducer stack disposed on an acoustic attenuating backing and a front face. Yet another low frequency pulse-echo ultrasonic transducer comprises a transducer composite made from a lead metaniobate. Still another frequency pulse-echo ultrasonic transducer comprises a composite stack. A further low frequency pulse-echo ultrasonic transducer comprises a composite stack, wherein multiple drive elements allow driving individual elements at different times. The transducers may be driven in a multiple-pulse time delayed manner.
E21B 47/00 - Relevés dans les trous de forage ou dans les puits
E21B 49/00 - Test pour déterminer la nature des parois des trous de forageEssais de couchesProcédés ou appareils pour prélever des échantillons du terrain ou de fluides en provenance des puits, spécialement adaptés au forage du sol ou aux puits
A piezoceramic pulse-echo acoustic transducer includes protection layers for the piezoceramic that are tuned to the piezoceramic so as to optimize pulse-echo signal response (i.e. greater output signal bandwidth and increased return signal sensitivity)- The protection layers are tuned to the piezoceramic via material selection and thickness. The acoustic transducer has a backing, a piezoceramic adjacent the backing, an intermediate protection layer adjacent the piezoceramic, and a front protection layer adjacent the intermediate protection layer and opposite the piezoceramic. The front and intermediate protection layers are tuned to the piezoceramic via their acoustic impedance such that the acoustic impedance of the intermediate layer is greater than the acoustic impedance of the piezoceramic and of the front protection lay er. The acoustic impedance of the fron t protection lay er is less than the acoustic impedance of the piezoceramic.
A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The critically damped present acoustic stack utilizes a plurality of stacked acoustic elements such as piezoelectric ceramics that are energized in two manners, providing different center frequencies, each producing a respective center frequency of 100% bandwidth to yield an acoustic stack having a total bandwidth exceeding the bandwidth of an acoustic element or the bandwidth of the plurality of acoustic elements. One manner of energizing is to pulse only one of the the acoustic elements. The other manner is to pulse a first acoustic element then pulse a second acoustic element after a delay equal to the amount of time it takes for the first pulse to reach the face of the second acoustic element. The acoustic elements are bonded together and onto a critically damped backing of tungsten, The assembly is retained in a housing that is preferably made of PEEK. The acoustic stack is primarily used in pulse-echo analysis of metal casing wall thickness and cement bond quality detection of wells.
B06B 1/02 - Procédés ou appareils pour produire des vibrations mécaniques de fréquence infrasonore, sonore ou ultrasonore utilisant l'énergie électrique
10.
SYSTEM AND DEVICE FOR ACOUSTIC MEASURING IN A MEDIUM
A device for acoustic measuring in a medium in a borehole such as velocity of sound in the medium or velocity of the medium, includes at least a first acoustic array situated in a first, slanted sidewall of a measuring area and operating to emit a series of acoustic waveforms across a measuring area. In one form, the device includes a second acoustic array situated in a second, slanted sidewall of the measuring area and operating to receive an acoustic signal resulting from the emitted series of acoustic waveforms or to receive said acoustic signal and emit a second series of acoustic waveforms. A the processor measures a time between when a predefined portion of one of the series of acoustic waveforms was emitted and when a predefined portion of the received acoustic signal corresponding to the predefined portion of one of the series of acoustic waveforms is received by the acoustic receiver, and correlates the measured time to a reference time, then outputs a correlation factor for determining the velocity of sound in the medium in the measuring area. The processor may also calculate transit time for the two emitted acoustic signals or echoes from the first emitted acoustic signals to determine medium flow velocity.
G01V 1/40 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées au carottage
G01V 1/44 - SéismologieProspection ou détection sismique ou acoustique spécialement adaptées au carottage en utilisant des générateurs et des récepteurs situés dans le même puits
A buzzer includes a piezoelectric diaphragm and a housing enclosing the diaphragm and defining a resonating chamber. The chamber includes a sound port and has an optimal resonating frequency fHt at a temperature T defined by fHt = (vt/2π)(√(A/voL)) were vt is the velocity of sound waves in air at a temperature T, A is the effective area of the sound port, vo is the volume of the resonating chamber, and L is the effective length of the sound port. A temperature compensating member moves in response to changes in temperature to change the value of √(A/voL) at a rate and in a manner that balances the change in 1 /vt across that same temperature range, thereby reducing changes in the product (vt/2π)(√(A/voL)) and consequently reducing any changes that would otherwise occur in fHt across that temperature range, thereby holding the value of fH substantially constant across the temperature range.
G10K 9/122 - Dispositifs dans lesquels le son est produit par la vibration d'un diaphragme ou un élément analogue, p. ex. cornes de brume, avertisseurs de véhicule ou vibreurs fonctionnant électriquement utilisant des moyens d'entraînement piézo-électriques
G08B 3/00 - Systèmes de signalisation audibleSystèmes d'appel sonore de personnes
G08B 21/02 - Alarmes pour assurer la sécurité des personnes
12.
COMPLIANT COUPLANT WITH LIQUID RESERVOIR FOR TRANSDUCER
An elastomeric pad (70) structure coupled to an ultrasonic transducer (52) provides excellent coupling and transmission for extradermal applications without requiring the glycerin gel couplant typically used for such applications. The material and shape of the face of the pad (70) structure traps a small amount of liquid (90) between the pad (70) and the skin (24), providing an effective couplant not requiring further containment, rewetting, or clean-up. The elastomeric pad (70) may be releasably coupled to the ultrasonic transducer (52), and the various illustrative embodiments for coupling include the use of clips (700), adhesives, an adapter ring (800) having a lip (835) or grooves (830), a ring (400) having pins (410) for engaging holes in the elastomeric pad (420) and the transducer (430), and a sleeve (500) which employs pressure or friction to retain the elastomeric pad (510) to the transducer (520). Uses for the system and method include extradermal applications such as ultrasonic bone growth stimulation through a window cut in a bone fracture cast.
A flextensional transducer for use in the instrumentation of an oil well drill bit includes a stack of piezoceramic elements arranged to define a longitudinal axis and to move longitudinally in response to an electric signal, and a plurality of flexible, generally arcuate longitudinal ribs directly or indirectly connected to the piezo stack so that the ends of the ribs move longitudinally in response to the longitudinal movement of the piezo stack. This longitudinal movement of the ends of the ribs causes the middle portions of the ribs to flex radially, thus producing acoustic waves. The transducer is designed to operate in the hostile environment of the drilling bit of an oil well, and operates effectively at temperatures of at least -40°C to 150°C. The transducer provides sound waves at a frequency of about 15 KHz, with a -6dB bandwidth of 5KHz to 25 KHz and at a sound pressure of at least 2 kPa. The piezoceramic elements may be made of a material having a base formula of : PbxSr(1-X)(Mn1/3Sb2/3)(1-y)(ZrzTi1-z)yO3 wherein x is in the range of 0.95 to 0.99; wherein y is in the range of 0.92 to 0.97; and wherein z is in the range of 0.45 to 0.55; with the composition further including one or more dopants selected from the group consisting of : PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof.
H02N 2/18 - Machines électriques en général utilisant l'effet piézo-électrique, l'électrostriction ou la magnétostriction fournissant une sortie électrique à partir d'une entrée mécanique, p. ex. générateurs
15.
COMPOSITIONS FOR HIGH POWER PIEZOELECTRIC CERAMICS
A class of ceramic compositions according to the formula Pb(1-z)Mz (Mn1/3Sb2/3) x (ZryTi1-y) 1-x03 where M is selected to be either Sr or Ba, x is selected to be between 0.01 and 0.1, y is selected to be between 0.35 and 0.55, and z is selected to be between 0.01 and 0.10. In some embodiments of the above composition, one or more dopants is added to the compositions. The dopant (s) may be selected from the group comprising: PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof . The dopants can be added to the ceramic composition in individual amounts ranging from 0.01 wt% to up to 5.0 wt%. The preferred ceramic compositions exhibit one or more of the following electromechanical properties: a relative dielectric constant (.epsilon.) of between 1200 and 2000, a mechanical quality factor (Qm) of between l500 and 2800; a piezoelectric strain constant (d33) of between 250-450 pC/N, a dielectric loss factor (tan .delta.) of between 0.002- 0.008 and a thickness electromechanical coupling coefficient (kt) of between 0.45 and 0.7.
C04B 35/493 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxydes de zirconium ou d'hafnium ou de zirconates ou d'hafnates contenant également de l'oxyde de titane ou des titanates à base de zirconates de plomb et de titanates de plomb contenant également d'autres composés du plomb
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
Produits et services
Custom manufacture of piezoelectric ultrasound transducers and ceramic crystals for applications such as vibration monitoring, imaging arrays, weather radar probes and industrial and process controls, and industries such as biotech, pharmaceutical, automotive, marine, aerospace and consumer
