On the Collapse of Long, Thick-Walled Tubes Under External Pressure and Axial Tension

Madhavan, R.; Babcock, C. D.; Singer, Josef

doi:10.1115/1.2929488

Cited by 23 publications

(9 citation statements)

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“…The results were validated through comparison with a series of experimental data obtained and presented by Madhavan [14].…”

Section: Introductionmentioning

confidence: 90%

“…The finite element analysis method proposed in this paper was validated by comparing against experimental data corresponding to steel casings used commercially and presented by Madhavan [14]. The seamless, cold drawn, 304 stainless steel casings which are manufactured according to the API Specification 5LX standards were used for comparison purposes in this study.…”

Section: Model Validationmentioning

confidence: 99%

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Numerical simulations of casing collapse: a case study in the South of Iran

Gholami¹,

Rasouli²

2012

Petroleum and Mineral Resources

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Collapse of casings during production has been reported on many occasions in different fields. Regardless of the root for the failure of the casings, this is due to stresses applied to the casing exceeding its ultimate strength. Failure of the casing similar to any pipe could be due to compressional, tensional, and burst or collapse forces due to various loads being applied to the casing string. Although several analytical models have been developed based on elastic or plastic approaches to estimate the ultimate strength of casing, it has been shown that these methods underestimate the casing strength. Casings' mechanical and geometrical parameters, effective in-situ stresses, temperature, formation properties and other intervening are simultaneously required for a complete design of casing. To simulate the failure of casing in the presence of various forces, numerical modeling is a robust approach that can be employed. In this study, finite element simulation was used through the use of ABAQUS software to model the failure of casings in one of the wells located in the southern part of Iran. The results revealed that increasing the diameter to thickness (D/t) ratio decreases the ultimate strength of casing, leading to unexpected failure in the wells under consideration. It was also shown that eccentricity drastically reduces the strength of casing. Since the numerical results of current study were in an acceptable agreement with experimental studies, numerical simulation method proposed here can be used to predict the casing collapse.

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“…The results were validated through comparison with a series of experimental data obtained and presented by Madhavan [14].…”

Section: Introductionmentioning

confidence: 90%

Section: Model Validationmentioning

confidence: 99%

Numerical simulations of casing collapse: a case study in the South of Iran

Gholami¹,

Rasouli²

2012

Petroleum and Mineral Resources

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“…Thick-walled tubular specimens are used to replicate real-life structures such as bridge girders [66], high pressure containers, and deep submersibles in power plants or even as protective oil casing conduits in oil and natural gas extraction [67]. On the other hand, thin-walled test pieces appear to be suitable for simulating the loading that could be experienced by shell structures such as a pressure vessel or piping [63], a bicycle frame or even an aircraft wing [68].…”

Section: Cylindrical Solid and Tubular Biaxial Fatigue Specimensmentioning

confidence: 99%

Review of Multiaxial Testing for Very High Cycle Fatigue: From ‘Conventional’ to Ultrasonic Machines

et al. 2020

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Fatigue is one of the main causes for in service failure of mechanical components and structures. With the development of new materials, such as high strength aluminium or titanium alloys with different microstructures from steels, materials no longer have a fatigue limit in the classical sense, where it was accepted that they would have ‘infinite life’ from 10 million (107) cycles. The emergence of new materials used in critical mechanical parts, including parts obtained from metal additive manufacturing (AM), the need for weight reduction and the ambition to travel greater distances in shorter periods of time, have brought many challenges to design engineers, since they demand predictability of material properties and that they are readily available. Most fatigue testing today still uses uniaxial loads. However, it is generally recognised that multiaxial stresses occur in many full-scale structures, being rare the occurrence of pure uniaxial stress states. By combining both Ultrasonic Fatigue Testing with multiaxial testing through Single-Input-Multiple-Output Modal Analysis, the high costs of both equipment and time to conduct experiments have seen a massive improvement. It is presently possible to test materials under multiaxial loading conditions and for a very high number of cycles in a fraction of the time compared to non-ultrasonic fatigue testing methods (days compared to months or years). This work presents the current status of ultrasonic fatigue testing machines working at a frequency of 20 kHz to date, with emphasis on multiaxial fatigue and very high cycle fatigue. Special attention will be put into the performance of multiaxial fatigue tests of classical cylindrical specimens under tension/torsion and flat cruciform specimens under in-plane bi-axial testing using low cost piezoelectric transducers. Together with the description of the testing machines and associated instrumentation, some experimental results of fatigue tests are presented in order to demonstrate how ultrasonic fatigue testing can be used to determine the behaviour of a steel alloy from a railway wheel at very high cycle fatigue regime when subjected to multiaxial tension/torsion loadings.

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“…Later, Madhavan et al. 131 extended their study to pipes with D/t ratios ranging from 10 to 40. They found that the extent of the reduction in the collapse pressure of the pipe and the nature of the collapse pressure-tension interaction profile are strongly dependent on the stress–strain behaviour of the pipe’s material.…”

Section: Analysis Of Offshore Pipes Under Different Loadsmentioning

confidence: 99%

A review of the design and analysis of reinforced thermoplastic pipes for offshore applications

Морозов

Ashraf

et al. 2017

Journal of Reinforced Plastics and Composites

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The development and recent applications of reinforced thermoplastic pipes for offshore oil and gas applications are reviewed. The design and materials of reinforced thermoplastic pipes are presented. Reinforced thermoplastic pipes have been increasingly accepted as an important alternative to traditional metallic offshore pipes due to their distinct advantages such as a higher stiffness to weight ratio, improved fatigue resistance and better corrosion resistance. Their potential applications can be extended to deep-water risers. Loading conditions which could be experienced by them for offshore applications are described. Existent studies and analyses of offshore pipes under these loading conditions are discussed. Based on this discussion, this article outlines the limitations of the current studies of reinforced thermoplastic pipes and future work to improve the analysis and design of reinforced thermoplastic pipes is recommended.

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On the Collapse of Long, Thick-Walled Tubes Under External Pressure and Axial Tension

Cited by 23 publications

References 0 publications

Numerical simulations of casing collapse: a case study in the South of Iran

Numerical simulations of casing collapse: a case study in the South of Iran

Review of Multiaxial Testing for Very High Cycle Fatigue: From ‘Conventional’ to Ultrasonic Machines

A review of the design and analysis of reinforced thermoplastic pipes for offshore applications

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