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Title: Experience With The Latest Developments In Ultrasonic Transducer Technology
Author: Skule Smrgrav, Atle K. Abrahamsen, Kare Kleppe
Source: 2008 South East Asia Flow Measurement Conference
Year Published: 2008
Abstract: As ultrasonic gas flow meters are being used in more and more applications across the oil and gas industry certain applications have resulted in damaged transducers and failing measurements. Such applications include wet gas, after 1st or 2nd stage separation, high gas condensate fields, corrosive environments such as high H2S sites (more predominant in the later life of many sites). The advances in electronics and signal processing have made possible certain developments on ultrasonic transducers. Limitations due to material exposure to such corrosive environments are removed with the application of titanium as the only wetted part of USM transducers. Even though the definition of wet gas is difficult, and we will not try to do so here either, - for the purpose of this paper we consider liquid volume contents from 0,01% to 5% as wet gas. The obvious reason for calling it wet gas is of course the fact that it is by far mostly gas (more than 95%) and a little liquid (less than 5%). This means that the meter will basically operate like in gas measurement, but with the added difficulties caused by the presence of liquid.

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