Communications – electrical: acoustic wave systems and devices – Testing – monitoring – or calibrating
Patent
1992-02-10
1992-09-15
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Testing, monitoring, or calibrating
7386118, G01N 2902
Patent
active
051484056
ABSTRACT:
A non-intrusive method for the determination of characteristics of slug flow in a multiphase flow pipeline comprising the steps of: detecting the acoustic emissions from the pipeline in the ultrasonic frequency range by means of at least one sound transducer, the output from which is an analogue electrical signal, converting the analogue signal to a digital signal, and analyzing the digital signal to determine the characteristics of the slug flow.
The characteristics of slug flow which may be determined include distinguishing slug flow from wave flow, the frequency of slugging and the velocity and length of slugs. The method is particularly suitable for studying multiphase flow comprising oil, gas and water.
REFERENCES:
patent: 4628725 (1986-12-01), Gouilloud et al.
Control and Instrumentation, Feb. 1989, Roger Baker "Multi-Phase Flow Moves On," pp. 35 & 37.
Belchamber Ronald M.
Brister Derek
Collins Michael P.
Hill John
Watkins Robert
Evans Larry W.
Gilbert Teresan W.
Pihulic Daniel T.
The British Petroleum Company p.l.c.
Untener Dave J.
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