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Collapse Pressure of Oval Coiled Tubing
Proceedings of European Petroleum Conference, 1992Abstract Coiled Tubing (CT) is sometimes used in applications where the pressure outside the CT may be higher than the pressure inside the CT. These applications include operations in high pressure wells1 and reverse circulation operations where a fluid is pumped down the annulus and returns are taken up through the CT. If the difference
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The collapse of cylinder/sphere intersecting pressure vessels
Nuclear Structural Engineering, 1965Abstract A general method is presented for finding lower and upper bounds on the collapse pressure for a plastic-rigid vessel composed of intersecting cylindrical and spherical shells obeying Tresca's yield condition and associated flow rule. Depending upon the ratio ( t d )/( T D ) different types of solutions are generated.
F ELLYIN, A SHERBOURNE
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Pressure/flow behaviour in collapsible tube subjected to forced downstream pressure fluctuations
Medical & Biological Engineering & Computing, 1995An experimental investigation has been made into the pressure/flow behaviour of a collapsible tube subjected to downstream pressure fluctuations. These downstream pressure waves are observed to be transmitted upstream beyond the point of collapse. The mean flow rate is not significantly affected by the amplitude or frequency of pressure fluctuations ...
Low, T.H. +3 more
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Hydrostatic Collapse Pressure and Radial Collapse Force Comparisons for Ultra-Deepwater Pipelines
Volume 6B: Pipeline and Riser Technology, 2014In this paper the behavior and the relationship between hydrostatic collapse pressure and diametrically opposed radial compressive force for pipelines were analyzed. This study presents an introduction of a research work aimed to assess the pipeline collapse pressure based on the radial collapse force.
Marco A. P. Rosas +3 more
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The Collapse or Ballooning Pressure of Thick-Walled Pressure Vessels
MRS Proceedings, 1983ABSTRACTDiscussion of the proposed extension of the ASME pressure vessel code to cover operating pressures up to 1.4 GPa (200000 lbf/in2 ) has generated the proposal that two criteria should be used, of which one would be the collapse or ballooning pressure not the bursting pressure.
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Skewed norms under peer pressure: Formation and collapse [PDF]
, 2014 This paper shows that peer pressure may lead to dynamic convergence to a norm that is skewed with respect to preferences in society, yet is endogenously upheld by the population. Moreover, a skewed norm will often be more sustainable than a representative norm. This may explain the skewness of various social and religious norms.
Michaeli, Moti, Spiro, Daniel
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Collapse Tests on Externally Pressurized Toroids
Journal of Pressure Vessel Technology, 2002The paper discusses the load-carrying capacity of toroidal shells with closed circular cross section and loaded by static external pressure. Details about the manufacturing, pre-experiment measurements and testing of three, nominally different, steel toroids are provided.
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The pressure within a collapse tube, with special reference to urethral pressure
Physics in Medicine and Biology, 1985A definition is proposed for tube pressure (the pressure within a collapsible tube in the collapsed state, e.g. the urethral pressure or the pressure in the anal or oesophageal sphincter) which conforms to the common sense view that it is a measure of the ability of the tube to prevent leakage.
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