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TECHNICAL PAPERS

Multiaxial Cyclic Ratcheting in Coiled Tubing—Part II: Experimental Program and Model Evaluation

[+] Author and Article Information
Radovan Rolovic, Steven M. Tipton

Department of Mechanical Engineering, University of Tulsa, Tulsa, OK 74104

J. Eng. Mater. Technol 122(2), 162-167 (Sep 21, 1999) (6 pages) doi:10.1115/1.482782 History: Received November 19, 1998; Revised September 21, 1999
Copyright © 2000 by ASME
Topics: Pressure , Tubing , Stress
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References

Figures

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Schematic layout drawing of bending/tensile test machine
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Tubing diameters measured during testing program
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Variation of tubing diametral growth along the gage length
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Typical pressure variation during block-pressure tests
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Cross-section of tubing divided into equal segments
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Diametral growth test data and predictions for QT-800 under low constant pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-800 under high constant pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-1000 under block pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-1000 under block pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-800 under block pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-800 under block pressure, cyclic bending loading
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Diametral growth test data and predictions for QT-800 under block pressure, cyclic bending loading
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Graphical representation of diametral growth mechanism when axial/bending cycling is applied at CD hoop stress level
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Graphical representation of diametral shrinkage mechanism under positive hoop stress. Axial/bending cycling at σhi hoop stress (a) is followed by axial/bending cycling at σhj hoop stress (b).
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Wall thinning during cyclic bending/internal pressure loading

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