scholarly journals Electronics Design for Dual Energy Gamma-Ray Multiphase Flow Meter

2007 ◽  
Author(s):  
Donghui Li ◽  
Yingxiang Wu ◽  
Keren Wang
Keyword(s):  
Multiphase Flow ◽  
Gamma Ray ◽  
Dual Energy ◽  
Flow Meter ◽  
Energy Gamma ◽  
Electronics Design

scholarly journals WATER CONTENT AND BULK DENSITY CHANGES IN A SOIL PEDON MEASURED WITH DUAL ENERGY GAMMA-RAY TRANSMISSION

1974 ◽  
Vol 54 (3) ◽  
pp. 325-328 ◽  
Author(s):  
R. J. REGINATO
Keyword(s):  
Water Content ◽  
Bulk Density ◽  
Gamma Ray ◽  
Soil Surface ◽  
Dual Energy ◽  
Transmission Technique ◽  
Density Values ◽  
Energy Gamma ◽  
Irrigation Levels ◽  
Water Contents

Water contents and bulk densities were measured in a soil pedon with a gamma-ray transmission technique utilizing 137Cs and 241Am. By alternating the sources for each scan down the soil profile, both bulk density and water content were determined in 1-cm increments in the top 10 cm of the pedon. Bulk density decreased to a depth of 6 cm about 30 min after 4 cm of water was ponded on the soil surface. As soon as the water drained from the surface, bulk density values increased and approached pre-irrigation levels. Water content increased rapidly corresponding to the decrease in bulk density. Assuming that the bulk density remains constant during ponding, calculated water contents may be in error by as much as 0.25 gcm−3.

scholarly journals Examination for Practical Use in Dual Energy Gamma-ray Transmission Techniques. Application to Grading of Gold Alloys.

RADIOISOTOPES ◽  
1995 ◽  
Vol 44 (5) ◽  
pp. 315-320
Author(s):  
Iwao UMEDA ◽  
Toshio MUTO ◽  
Raita KITSUTAKA ◽  
Takuo NONOMURA
Keyword(s):  
Gamma Ray ◽  
Dual Energy ◽  
Gold Alloys ◽  
Energy Gamma

TRIALS OF A MULTIPHASE FLOW METER ON PRODUCTION PIPELINES FROM OIL WELLS

1994 ◽  
Vol 34 (1) ◽  
pp. 101
Author(s):  
G.J. Roach ◽  
J.S. Watt ◽  
H.W. Zastawny ◽  
P.E. Hartley ◽  
W.K. Ellis
Keyword(s):  
Multiphase Flow ◽  
Gamma Ray ◽  
Least Squares Regression ◽  
Mean Flow ◽  
Flow Meter ◽  
Horizontal Section ◽  
Oil Processing ◽  
Production Platform ◽  
Oil Water ◽  
Water Cut

This paper describes trials of a new multiphase flow meter (MFM) on the Vicksburg offshore production platform and at the oil processing facilities on Thevenard Island. The flow meter is based on two specialised gamma-ray transmission gauges mounted on a pipe carrying the full flow of oil, water and gas.Two MFMs were used in both trials, one mounted on a vertical (up flow), and the other on a horizontal, section of a pipeline linking the test manifold to the test separator. Measurements were made on flows of oil/water/gas mixtures from each well, and on combined flows of different pairs of wells.The r.m.s. difference between the flow rates determined by the MFM and by the separator output meter was determined by least squares regression. For the Vicksburg trial, the ratio of r.m.s. difference and mean flow rate was 8.9 per cent for oil, 5.6 per cent for water, 5.2 per cent for liquids, and 8.2 per cent for gas for flows in the vertical pipeline and slightly larger for flows in the horizontal pipeline. For the Thevenard Island trial, the preliminary results for flows in the vertical pipeline show the ratio to be 6.8 per cent for oil, 6.0 per cent for water, 3.4 per cent for liquids, and 5.9 per cent for water cut.

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