Multiphase slug flow characteristics and their effects on corrosion in pipelines
Sun, Jyi-Yu
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https://hdl.handle.net/2142/19800
Description
Title
Multiphase slug flow characteristics and their effects on corrosion in pipelines
Author(s)
Sun, Jyi-Yu
Issue Date
1991
Doctoral Committee Chair(s)
Jones, Barclay G.
Department of Study
Mechanical Science and Engineering
Discipline
Mechanical Science and Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Chemical
Engineering, Mechanical
Engineering, Petroleum
Language
eng
Abstract
The study of corrosion in multiphase pipelines is usually conducted in the laboratory using single phase test systems. The results from these tests are often extrapolated to large diameter pipelines. Great errors can occur in this process.
This study utilizes stationary slugs (i.e. hydraulic jumps) to simultaneously measure characteristics of the slug flow in horizontal pipes, including the local oil, water, and gas fractions within these slugs, the wall shear stress and flow turbulent intensity at 7 axial and 3 circumferential locations, pressure drops across the slugs, and corrosion/erosion rates at the bottom and the top of the pipe.
Results are reported for flows with and without corrosion inhibitors present. Two corrosion inhibitors A and C as prescribed by Arco Oil Company, have been examined. The test fluids are water only, oil only, and oil-water mixtures of 20% oil and 80% water and 40% oil and 60% water, respectively. Measurements, along with visual observations, for each inhibitor indicate that there are significant differences in the way that the inhibitors act to reduce the corrosion rate.
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