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公开(公告)号：US11525719B2
公开(公告)日：2022-12-13
申请号：US16190653
申请日：2018-11-14
Applicant: ExxonMobil Research and Engineering Company
Inventor： Kenneth W. Desmond , Gary L. Hunter
IPC: G01F1/663 , G01F1/74 , G01F1/7082 , G01F1/667 , G01F1/712
Abstract: Systems and methods are provided for estimating the flow velocity of a multi-phase flow in a pipe using injected microbubbles in combination with ultrasonic signals produced by transducers external to the pipe. The transducers can be located so that one transducer/receiver pair is downstream from a second pair by a separation distance. The receivers can preferably be located in alignment with the transducers for receiving a desirable amount of signal emitted from microbubbles that are excited by absorption of energy from a signal generated by a transducer. The frequency of the signal emitted by the microbubbles can correspond to a harmonic and/or sub-harmonic of the frequency of the signal generated by the transducer. In order to improve the signal-to-noise ratio, frequencies corresponding to a primary frequency emitted by a transducer can be filtered out.
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公开(公告)号：US20190154479A1
公开(公告)日：2019-05-23
申请号：US16190734
申请日：2018-11-14
Applicant: ExxonMobil Research and Engineering Company
Inventor： Kenneth W. Desmond , Gary L. Hunter
Abstract: Systems and methods are provided for estimating the flow velocity of a multi-phase flow using signals of different frequencies. The signals can correspond to any convenient type of signal that interacts with contrast agents in the multi-phase flow, such as acoustic signals or electromagnetic signals. The signal emitters can be located so that one emitter/receiver pair is downstream from a second pair by a separation distance. The receivers can preferably be located in sufficient alignment with the emitters to receive a transmitted portion of the emitter signal after any scattering or attenuation from the contrast agents in the multi-phase fluid. The emitters can be configured to generate signals of different frequencies. This can allow filters to be used on the received signals, so that the resulting filtered signal from the first receiver corresponds substantially to energy received from the first emitter, while the filtered signal from the second receiver corresponds substantially to energy received from the second emitter. The filtered signals can then be cross-correlated to determine a time shift that results in a maximum correlation. This time shift can be used in conjunction with the distance between the emitters to calculate an estimated flow velocity.
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公开(公告)号：US20190154482A1
公开(公告)日：2019-05-23
申请号：US16190653
申请日：2018-11-14
Applicant: ExxonMobil Research and Engineering Company
Inventor： Kenneth W. Desmond , Gary L. Hunter
IPC: G01F1/66
Abstract: Systems and methods are provided for estimating the flow velocity of a multi-phase flow in a pipe using injected microbubbles in combination with ultrasonic signals produced by transducers external to the pipe. The transducers can be located so that one transducer/receiver pair is downstream from a second pair by a separation distance. The receivers can preferably be located in alignment with the transducers for receiving a desirable amount of signal emitted from microbubbles that are excited by absorption of energy from a signal generated by a transducer. The frequency of the signal emitted by the microbubbles can correspond to a harmonic and/or sub-harmonic of the frequency of the signal generated by the transducer. In order to improve the signal-to-noise ratio, frequencies corresponding to a primary frequency emitted by a transducer can be filtered out.
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4.发明申请公开(公告)号：US20200348250A1
公开(公告)日：2020-11-05
申请号：US16736107
申请日：2020-01-07
Applicant: ExxonMobil Research and Engineering Company
Inventor： Gary L. Hunter , Jonathan Pita , Peter W. Jacobs
Abstract: Systems and methods for real-time monitoring of electrical discharge events across a tribological contact are provided. The systems comprise a signal generator, a test device comprising a tribological contact, a reference device and a signal comparator. The systems recognize changes between states where electrical discharge across a tribological contact does or does not occur and produce distinct output signals for each state and, further, may maintain a count of how often such events occur.
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