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Proceedings Papers

Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32195-MS
... that process is tailored to its unique structural aspects. In addition to evaluating the structure for metocean strength and fatigue loading, seismic and ship collision loading were also components of the assessment. Incorporating the current condition of the assets into the process, the probability of failure...
Proceedings Papers

Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32267-MS
... the seismic design loads. As a result, two-dimensional (2D) non-linear seismic site response analyses (SRA) in a finite element program were performed using an advanced constitutive model. Excess pore pressures generated during the design earthquake for the free field case (i.e. no structure...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31889-MS
... perspective (i.e. phasing between vessel motions and wave elevation is incorrect), in a shallow water context (33 m) where direct wave loading on the risers contributes as much as vessel motions. Second comparing the use of a Gumbel distribution versus an empirical distribution to determine levels of non...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31767-MS
... Abstract Annular pressure buildup (APB) can occur due to an increase in fluid temperature during the production of hot reservoir fluids, geomechanical loading from the surrounding rock formation, and hydraulic connectivity to pressurized reservoirs. In this study, a novel, compressible...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31811-MS
... in its actual environment, taking into account in particular the different interactions with other layers seen by the material in the current length and in the end-fitting area (high contact pressures, multiaxial loadings, combination of pressure and temperature variations, frictional / sliding behavior...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31051-MS
... tree systems require such a connection to be made between the tree and other components in the subsea wellhead system. As these connections are closest to the seabed and at the bottom of any riser stack they require the integrity to handle high loading that can be induced by the drilling, intervention...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31266-MS
... further be superimposed by additional softening effects due to testing at elevated temperatures. Abstract Composite structures are used as corrosion insensitive load bearing reinforcement in dynamic Thermoplastic Composite Pipe (TCP) and Hybrid Flexible Pipe (HFP) applications. The qualification...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31171-MS
... the polyester segments to 40% Minimum Break Load (MBL) and hold it at the target level for at least 60 mins before returning to the target pre-tension levels. Industry experience indicates that 40% MBL is a sweet spot for preloading the polyester ropes indicating that no re-tensioning of the system would...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31129-MS
... and keying, cyclic loading, sustained loading, keying disturbance, and out-of-plane loading. Recommendations are provided to advance the design of large-size SEPLAs, and more specific guidance is offered relative to the ambiguous requirements currently in the industry guidelines. subsea system...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31047-MS
...Introduction Abstract Subsea wellhead systems have a design fatigue life that is expected to withstand the damage incurred from stress caused by cyclic loading during its operation. Wellhead fatigue is a critical factor when drilling offshore wells because the condition of the wellhead...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31115-MS
...Thermal Loading Use of both carbon and stainless-steels are common for blast-resistant wall design. Stainless steels offer several benefits over carbon steel, such as increased ductility, and thus a stainless-steel (SS2304) was utilized for this study. The panels and connections were designed...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30895-MS
.... A. , & Lal , M. ( 1995 , September 1 ). An Evaluation of Concentric Casing for Nonuniform Load Applications . Society of Petroleum Engineers . doi: 10.2118/29232-PA Willson , S. M. , Fossum , A. F. , & Fredrich , J. T. ( 2003 , March 1 ). Assessment of Salt Loading on Well...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30712-MS
... proppant fracturing materials associative polymer viscosity hydraulic fracturing eff shear rate fracturing fluid conductivity friction loss requirement polymerization rheometer loading offshore technology conference polymer eff system fracture J.E. Glass (Ed.), Water...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29248-MS
... for blast loading, accounting for the fatigue impact of wave induced accelerations, new materials and coating systems for a marine environment, and novel base designs to take advantage of the modular construction. This paper describes these changes and the innovations in design and fabrication...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29346-MS
... to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of OTC copyright. Abstract Pile foundations supporting offshore structures are typically subjected to lateral cyclic loading. In design, the pile...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29376-MS
... the size effect associated with strain-softening soils. The FE analysis results are compared to the test data from the independently conducted model tests and the established results from the literature. Good agreements among different studies are observed. clukey constitutive model loading shear...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29249-MS
... Fatigue Predictions for HPHT Equipment" , Offshore Technology Conference Paper #19502, May 2008 geometry material property hpht equipment crack growth stress distribution seat pocket crack growth rate upstream oil & gas high pressure high temperature valve body loading internal...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29223-MS
... limitations in current standards when calculating the fatigue capacities of non-preloaded connectors with different interacting component materials (i.e. low alloy steel and nickel based alloys). The methodology considers the effect on the fatigue life of both non-axisymmetric geometry/loading, FAT loading...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29377-MS
... the scope of past work, the current validation testing will be performed and will include (1) material characterization, (2) testing to validate the models used in the Load Resistance Factor Design (LRFD) for the global criteria and (3) testing to identify normal, extreme and survival externally applied...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29460-MS
... by the weakening of a structure or component of the equipment due to cyclic loading. Consistently operating the equipment above the operational parameters can lead to premature failure of the equipment causing unplanned downtime and posing a safety risk to nearby workers. There are several methods currently being...

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