Results 211 to 220 of about 126,940 (259)
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Journal of Ocean University of China, 2015
Parametric instability of a riser is caused by fluctuation of its tension in time due to the heave motion of floating platform. Many studies have tackled the problem of parametric instability of a riser with constant tension. However, tension in the riser actually varies linearly from the top to the bottom due to the effect of gravity.
Yougang Tang, Tang Yougang
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Parametric instability of a riser is caused by fluctuation of its tension in time due to the heave motion of floating platform. Many studies have tackled the problem of parametric instability of a riser with constant tension. However, tension in the riser actually varies linearly from the top to the bottom due to the effect of gravity.
Yougang Tang, Tang Yougang
exaly +2 more sources
An Optimization Method of Top Tension in Drilling Riser–Conductor System
Arabian Journal for Science and Engineering, 2016Drilling riser–conductor system is crucial to the offshore drilling. Complex marine environment can give rise to a series of problems such as buckling and stability on riser–conductor system. A novel method that introduces the optimization of top tension and calculates axial force has been proposed.
Honghai Fan, Jinge Liu
exaly +2 more sources
Multi-Mode Motion Dynamics of a Top Tensioned Riser Excited by Vortices and Varying Tension
International Journal of Bifurcation and Chaos, 2022A coupled model of a top tensioned riser (TTR) under combined excitations from vortices and time-varying tension is proposed. And the van der Pol oscillator is introduced to simulate the time-varying characteristics of vortex shedding. The first three mode approximations as a six degree-of-freedom (DOF) system of vibrations of the fluid-structure ...
Dan Wang +3 more
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Modeling Approach of Hydropneumatic Tensioner for Top-Tensioned Riser
Journal of Offshore Mechanics and Arctic Engineering, 2018A three-dimensional (3D) finite element analysis (FEA) model of top-tensioned riser (TTR) with hydropneumatic tensioner is proposed in this work. First, the tension calculation equation of the hydropneumatic system is derived, and the kinematic relationship of the platform–tensioner–riser system is established.
Baiquan Chen +5 more
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Interference of Top Tensioned Risers for Tension Leg Platforms
Volume 5B: Pipelines, Risers, and Subsea Systems, 2017Dry tree top-tensioned risers (TTRs) are widely used on floating production systems such as TLPs and Spars for drilling, completion, workover and production. The interference between neighboring TTRs is an important consideration which has a direct impact on the total TTR payload budget and the wellbay size for floater sizing and cost.
Hanqing Zhang, Derek Smith
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Output feedback control of a flexible marine riser with the top tension constraint
Systems & Control Letters, 2022zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sai Zhang +2 more
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Top Tension Riser Fatigue Monitoring System
Volume 4: Pipeline and Riser Technology, 2011ATP Oil and Gas Corporation (ATP) is utilizing the MinDOC 3 vessel design for their Mirage, Morgus and Telemark fields. The modeling techniques utilized during the design and verification stages of the project suggest that the production top tension risers (TTR) may be affected by a phenomenon known as Wake Induced Oscillation (WIO).
G. Ross Frazer +3 more
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Time Domain VIV Prediction for Top Tensioned Risers
29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 2010Top Tensioned Risers (TTRs) have been widely used with floating production systems such as Spars and TLPs in deepwater field developments. A TTR system provides direct access to subsea wells from a floating platform for drilling, workover, and completion operations.
Yongming Cheng +3 more
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Investigation of VIV Fatigue Prediction for a Top Tensioned Riser
Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV, 2009Top tensioned risers (TTRs) have been widely used with floating production systems such as Spars and TLPs in deepwater field developments. A TTR system provides direct access to subsea wellheads from a floating platform for drilling, workover, and completion operations.
Yongming Cheng +3 more
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Critical Aspects to the Design and Installation of Top Tensioned Risers
Volume 3: Pipeline and Riser Technology; CFD and VIV, 2007Dual and single casing top tensioned risers are widely used by operators for deepwater floating production facility developments. These riser types provide direct vertical access for completions and workover. These single and dual barrier risers are a stable riser concept utilizing the effective tension distribution between casings and tubing to ...
Andy Westlake, Ronan Quinn
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