... of the worst performing pipes. collapse pressure collapse rating individual pipe joint reliability design rating correlation pipe trl probability series system upstream oil & gas th percentile individual pipe percentile estimation strength specimen procedure confidence interval...

... residual stress were considered. Modified Riks method was used to predict the casing onsite collapse pressure as well as the post-collapse response. Parameters considered in the analysis include: (i) two material grades (L80 and Grade 135); (ii) for each material grade, ratio of outside diameter to wall...

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... resistance upstream oil & gas manufacturing process compression test collapse pressure thermal cycle offshore pipeline Presentation of OTC-25422-MS Presentation of OTC-25422-MS Fabio Arroyo , Rafael Solano , Luciano Mantovano , Fabio Azevedo , Helio Alves...

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... a simple assessment of the effects of geometrical and material data on the collapse pressure of moderately thick tubes. An analytical expression has been generated and correlated to extensive test data and finite element models, proving the accuracy of the expression. The resulting formula also allows...

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... to cyclic loading. Cyclic loading was examined to estimate the remaining fatigue life at the dent location. Further, for deep-water, estimates were made of collapse pressure to determine the remaining factor of safety. This allows a decision to be made about whether remedial steps, such as, the installation...

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... OCTG (e.g., collapse pressure). The results of this study can be used to plan a program of materials qualification of a steel as an expandable to assure that the pipe properties and performance are fit-for-service downhole after expansion. Further, the results of this study can be used to infer...

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... column to "U-Tube" such that the heavy mud column dropping will create a large region of evacuated riser. External seawater pressure applied to evacuated riser defines this collapse condition. The maximum water depth for the evacuated region, and thus the maximum collapse-pressure, will occur about 30...

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... collapse, specific tests this project for the following reasons: were warranted on Referencesand illustrations at end of paper. 105 2l l l l Hydrostatic Collapse Research in Support of the Oman-India Gas Pipeline OTC 7705 Existing collapse pressure data on large diameter, low D/t UOE pipa is very limited...

... reinforced circumferential layers (total thickness 9.57mm) and carbon fiber reinforced longitudinal layers (7.28mm thick). A cross-section of the tube is shown on Fig.3, where the layered structure of the wall can be clearly seen. otc 6894 collapse pressure fatigue test composite riser tube...

... and chord is also varied between 36 ksi and 55 ksi. In all cases, the strain hardening modulus is taken as 375 ksi. The pressures normally ranged from O psi to a value equal to 0.8 of the API estimated collapse pressure for the chord member in question. The matrix of cases developed for the P = 0.33 and 1.0...

... such as eccentricity, residuaj stress, and the shape of the stress-strain curve, art normally not constdeked in the design formulas. TIM third part of these collapse predictions is tt determine the effects of the installation loads primarily external tension and bending, on the collapse pressure. 522 Concentrating...