This paper presents the experimental results of a joint industry riser test program. Over a five-year period, an extensive experimental investigation of hydrodynamic loads acting on various production risers was carried out. The program included the laboratory testing of many multitube riser configurations as well as a single cylinder. Several major oil companies sponsored the project. The tests were made with rather large-scale models which were: 1) held stationary in steady current, 2) moved at constant speed or constant acceleration through a quiescent fluid or through a moving fluid, and 3) held stationary in oscillating flow or in steady current superimposed on oscillating flow. The primary objective of this investigation was to establish an accurate measurement of the hydrodynamic forces on bundle-type risers. The findings from this study will be presented in two papers. In the first, we shall present the hydrodynamic force coefficients for some marine risers consisting of one or more cylinders interacting either only with currents or oscillatory flow separately. In a companion paper, the pertinent data for the joint presence of the oscillatory flow and currents will be discussed. Among the results outlined here are the drag, inertia, and lift coefficients for various composite risers as a function of the Reynolds and Keulegan-Carpenter numbers. An analysis and synthesis of the test data are also presented.
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June 1985
Research Papers
Hydrodynamic Forces on Multitube Production Risers Exposed to Currents and Waves
Z. Demirbilek,
Z. Demirbilek
Conoco Inc., Research and Development Department, Ponca City, Okla. 74603
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T. Halvorsen
T. Halvorsen
Kongsberg Subsea Division, Kongsberg Vapenfabrik A/S, Kongsberg, Norway
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Z. Demirbilek
Conoco Inc., Research and Development Department, Ponca City, Okla. 74603
T. Halvorsen
Kongsberg Subsea Division, Kongsberg Vapenfabrik A/S, Kongsberg, Norway
J. Energy Resour. Technol. Jun 1985, 107(2): 226-234 (9 pages)
Published Online: June 1, 1985
Article history
Received:
January 11, 1984
Revised:
June 27, 1984
Online:
October 22, 2009
Citation
Demirbilek, Z., and Halvorsen, T. (June 1, 1985). "Hydrodynamic Forces on Multitube Production Risers Exposed to Currents and Waves." ASME. J. Energy Resour. Technol. June 1985; 107(2): 226–234. https://doi.org/10.1115/1.3231181
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