Abstract: A system for determining characteristics of a multiphase fluid includes pipe and multiple pairs of transducers positioned circumferentially around the pipe. Each pair of transducers includes a transmitting transducer and a receiving transducer. The transmitting transducer of each pair of transducers is oriented to transmit a respective acoustic signal toward the receiving transducer of the pair of transducers. The transmitting transducer of each pair of transducers is operable to transmit the respective acoustic signal sequentially with respect to other transmitting transducers of the multiple pairs of transducers. A reception of a first acoustic signal transmitted by a transmitting transducer of a first pair transducers of the multiple pairs of transducers is completed by a receiving transducer of the first pair transducers before a transmitting transducer of another pair of transducers of the multiple pairs of transducers transmits a second acoustic signal.

Abstract: A system for determining characteristics of a multiphase fluid includes pipe and multiple pairs of transducers positioned circumferentially around the pipe. Each pair of transducers includes a transmitting transducer and a receiving transducer. The transmitting transducer of each pair of transducers is oriented to transmit a respective acoustic signal toward the receiving transducer of the pair of transducers. The transmitting transducer of each pair of transducers is operable to transmit the respective acoustic signal sequentially with respect to other transmitting transducers of the multiple pairs of transducers. A reception of a first acoustic signal transmitted by a transmitting transducer of a first pair transducers of the multiple pairs of transducers is completed by a receiving transducer of the first pair transducers before a transmitting transducer of another pair of transducers of the multiple pairs of transducers transmits a second acoustic signal.

Abstract: A system, method and device may be used to monitor conditions in a borehole. Well tubing and casing act as a conductive pair for delivering power to one or more downhole active sensors. At the surface, power and signal are isolated so that the same conductive pair may act to transmit the sensor signals to the surface. In an embodiment, the sensor signals are RF signals and the surface electronics demodulate the RF signals from the sensor power.

Abstract: A system, method and device may be used to monitor conditions in a borehole. Well tubing and casing act as a conductive pair for delivering power to one or more downhole active sensors. At the surface, power and signal are isolated so that the same conductive pair may act to transmit the sensor signals to the surface. In an embodiment, the sensor signals are RF signals and the surface electronics demodulate the RF signals from the sensor power.