... of inherent circumferential residual stress (RS) on casing collapse resistane to external pressure through parametric Finite Element Analysis (FEA). Nonlinear elastic-plastic FEA study on casing collapse calculations have been performed. Different magnitudes and orientations of the initial circumferential...

... offshore pipeline information application qualification program end fitting wellbore design tensile armor external pressure interface wellbore integrity flexible pipe design methodology internal pressure Introduction Flexible pipes have been used extensively in the oil and gas...

... analytical solution for sandwich pipe systems under linearly varying external pressures , Ocean Engineering , Volume 124 , 2016 , Pages 298 – 305 , ISSN 0029-8018 , https://doi.org/10.1016/j.oceaneng.2016.07.022 . Jammer , P. , Hariharan , H. , & Klever , F. J. ( 2015 , March...

... difference was found to be the coexistence of internal and external pressures under the varying axial load and temperature in different operation stages, and the existence of environmental corrosion. In this paper, Finite Element Analysis (FEA) model was established to study the premium connection limit...

... Validation testing of the subsea equipment designed for HPHT applications using external pressures due to the hydrostatic head can be a challenge. This paper presents the tests performed to validate the design methods proposed in OTC-27891-MS. Use of a seawater hydrostatic head enables 15,000...

... external pressure specimen 1 high pressure high temperature completion tubular connection project management sequence operator strain gauge requirement complex reservoir ambient temperature compression offshore technology conference casing and cementing Procedures for Testing Casing...

... pressure Offset pipe The results of the FEA simulations are summarized in Table 1. Tension and compression both reduced shearing force as did in plane bending. Internal pressure increased required shearing force. At low external pressure, shearing force was reduced, but above 3000 psi (20.7MPa...

... External pressures due to hydrostatic heads on subsea equipment which fall under API SC 17 can now be accounted for in the equipment design and rating as a depth-adjusted working pressure (DAWP) with design guidelines from the recently published API 17 TR 12. This can be beneficial...

... avenues for potential applications in the offshore pipeline industry. auxetic composite pipe steel pipe piping simulation external pressure piping design indentation resistance alderson midstream oil & gas composite material auxetic material internal pressure upstream oil & gas...

... This paper presents an overview of API 17 Technical Report TR12: Consideration of External Pressure in the Design and Pressure Rating of Subsea Equipment, a technical report prepared by a work group under the auspices of the API Subcommittee 17 (API SC17). This subject is of significant interest...

... and to obtain data to improve the applied design tools. As part of the qualification process, lateral instability under external pressure and cyclic bending, known as lateral buckling (LB), was investigated for a 6-inch ID flexible pipe flowline with wet annulus conditions. This was done by performing reduced...

... deepwater pipeline api rp 1111 riser valve internal hydrotest pressure hydrotest pressure design pressure differential pressure guideline external pressure flowline riser system flowline guidance upstream oil & gas 30 CFR PART 250 — Oil and Gas and Sulphur Operations in the Outer...

... with internal and external pressure. Relatively little work has addressed the effect of these combined loads for the D/t (diameter/thickness) range of interest to submarine pipelines (between 10 and 45). Further, little attention has been paid to the importance of Lüder banding. This type of behaviour is normal...

... processes were originally developed for relatively high D/t land pipelines where the main design parameter is internal pressure. During the last two decades they have also been adapted to produce thicker linepipe used in offshore operations where the main design load is external pressure and the main limit...

... flexible pipelines and risers, a project was carried out at NKT Flexibles I/S to document the thermal performance by full scale thermal test at high external pressure. The deep water in-field conditions were replicated, including circulation of ambient water in the test setup. A 10 meter long instrumented...

... of the sphere to safely resist an external pressure are well known. Virtually all of the stresses 2 OTC 21189 in a spherical pressure vessel are compressive which greatly decreases the risk of metal fatigue and cracking. The alternative of cylindrical sections with spherical end caps has also been used...

... of the output with actual test data. formula tata steel collapse pressure fabrication factor otc 21378 ovality external pressure pipe material hydrostatic collapse diameter wall thickness capacity estimate stress-strain curve strength offshore pipeline offshore technology conference...

... Abstract It is known that the thermal exchange coefficient (TEC) of an insulated flexible pipe may be affected by both external pressure due to the operating water depth and by the annulus condition. International standards state that flexible pipe systems shall be designed considering...

... the influence of the inter-layer adhesion on the ultimate strength under external pressure and longitudinal bending of a sandwich pipe prototype. The maximum shear stress obtained from sandwich pipe specimens bonded by a particular adhesive indicated the adhesion levels to be adopted in the numerical...

... and the external pressure) times the bore area distributed over the end of the cylinder. Including and Excluding Hydrostatic Head Since some HPHT equipment is destined to be used in deepwater, some points are made with regard to the rating of the equipment. The discussion is important because a 20 kpsi rating...