Coupled Analysis of Floating Production Systems

ABSTRACT Fully coupled global analysis of Floating Production Systems, including the vessel, the mooring system and the riser system is described. Design of the system can be a daunting task, involving more than 1000 load cases for global analysis. The primary driver for the...

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Application of Limit Load Analyses to Assess the Structural Integrity of Pressure Vessels

ABSTRACT With advances in computational modeling techniques, limit load methods are gaining wider acceptance as a tool for determining the structural integrity of pressure vessels. The objective of a limit load analysis is to size a vessel or structure considering nonlinear...

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Techniques for Modeling Thermal and Mechanical Stresses Generated in Catalytic Cracker and Coke Drum Hot Boxes

ABSTRACT Consideration of heat transfer loading between surfaces during transient and steady state conditions is required when analyzing vessels that involve secondary stresses and low cycle fatigue. Some of the higher stresses occur in enclosed, non-insulated air space regions,...

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Modeling Leakage in a Fuel Transfer Pipeline Using Computational Fluid Dynamics Techniques

ABSTRACT Stress Engineering Services, Inc. (SES) performed an assessment of leaks for an insurance company that occurred in a fuel transfer pipeline at a tank storage facility. Of specific interest were the duration and timing of the leaks, which occurred from a 30 foot section...

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Selection and Qualification of Materials for HPHT Wells

ABSTRACT Interest in sour, high-pressure high-temperature (HPHT) wells and in ultra-HPHT wells, i.e. those with bottom hole temperatures greater than about 300° F (150° C) and wellhead pressures greater than about 10,000 psig (690 bar), is increasing worldwide. Due to the desire...

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The Marlin TLP: Measured and Predicted Responses during Hurricane Ivan

ABSTRACT The Marlin TLP uses an extensive monitoring system to measure the environment and platform responses. These measurements are used as an aid in platform operations and are also important for use in verifying analytical models of platform global performance. Marlin’s...

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Thermal and Mechanical Considerations for Design of Insulated Tubing

ABSTRACT Of the several options for controlling temperature in a well, vacuum-insulated tubing (VIT) has proven useful in a number of applications. Use of VIT, however, necessitates unique design considerations, from both a thermal and mechanical perspective. This paper describes...

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Improvements to Ultra‐deepwater Controls Reliability through State‐of‐the‐Art Analytical Techniques

ABSTRACT Three years ago, unexpected component failures were encountered in the blowout preventer (BOP) hydraulic systems of one of Transocean's newly built ultra-deepwater drillships. Specifically, the problems were collapsed hydraulic hoses. Attempts to mitigate the problems by...

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Design of a Riser Recoil Control System and Validation Through Full-Scale Testing

ABSTRACT: This paper discusses the development of a riser recoil control system for a state-of-the-art drilling vessel. This control system, designed using computer simulation, is capable of controlling riser recoil in water depths of 3,000 to 10,000 ft and a wide range of...

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