Radiant energy – Radiation tracer methods
Patent
1992-02-28
1994-04-26
Hannaher, Constantine
Radiant energy
Radiation tracer methods
250260, 250269, 250303, G01V 510
Patent
active
053069110
ABSTRACT:
A method for determining at least one dynamic flow characteristic of a multiphase flow circulating in a pipe, said flow being composed of an aqueous phase and a hydrocarbon (oil) phase. Oxygen atoms in the aqueous phase are activated by irradiation with neutrons at a chosen first location in the pipe. The concentration of activated oxygen at a chosen second location in the pipe is measured with a detector as a function of time t, so as to obtain at least one signal S(t). Then a relationship is fitted to the signal S(t) so as to derive the values of the velocity U of the aqueous phase. The slip velocity v.sub.s of a dispersed phase relative to the velocity of a continuous phase is also advantageously determined. From the values of velocities U and v.sub.s and from the volume fraction y.sub.1 of the continuous phase in the pipe (obtained by an ancillary measurement), the volumetric flow rates of the phases are determined.
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Stanislaw Szpilowski, Grazyna Strelczak, Ryszard Winnicki, "Radioactive Tracer Method as an Instrument for Testing Effectiveness of Effluent Treatment Installations and Mixing Patterns in Natural Streams", Nukleonika, vol. 21, No. 5 (1976) pp. 603-618.
Hannaher Constantine
Kanak Wayne I.
Ryberg John J.
Schlumberger Technology Corporation
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