Dynamic simulation of the wireline riser tensioner system for a mobile offshore drilling unit based on multibody system dynamics

Lee, Hyewon; Roh, Myung-Il; Ham, Seung-Ho; Ha, Sol

doi:10.1016/j.oceaneng.2015.07.028

Cited by 33 publications

(7 citation statements)

References 7 publications

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“…Ham et al (2015) conducted multibody dynamic research on a floating crane on water and revealed dynamic characteristics of the multibody system. Lee et al (2015) and Yang et al (2017) introduced multibody dynamics theory into the recoil analysis of a riser system. Besides the riser recoil analysis based on multibody dynamics, an extensional multibody analysis model including a drilling riser system, tensioners and a floating platform needs to be established to study the static and dynamic mechanical behavior of the drilling riser system.…”

Section: Introductionmentioning

confidence: 99%

Mechanical analysis of deepwater drilling riser system based on multibody system dynamics

Liu

Sun

et al. 2020

Pet. Sci.

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A multibody system including a drilling riser system, tensioners and a floating platform is key equipment for offshore oil and gas drilling. Most of the previous studies only focus on the drilling riser system rather than the multibody system. Mechanical characteristics of the deepwater drilling riser system cannot be analyzed accurately in a simplified model. Therefore, a three-dimensional multibody analysis program is developed. The static and dynamic characteristics of the deepwater drilling riser system under different platform motions are analyzed based on the developed program. The results show that the static displacement of the riser system with tensioners is smaller than that without tensioners, which means the tensioners can suppress the deformation of the riser system. Under surge and sway motions of the platform, the dynamic displacement of the riser system with tensioners is also smaller than that without tensioners due to the tensioner suppression effect. Besides, the heave motion induces a uniform axial vibration of the riser system, while roll and pitch motions excite the riser system to vibrate laterally. Compared with the stress amplitude due to surge and sway motions, the stress amplitude of the riser system due to heave, roll and pitch motions is relatively small but cannot be neglected.

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Section: Introductionmentioning

confidence: 99%

Mechanical analysis of deepwater drilling riser system based on multibody system dynamics

Liu

Sun

et al. 2020

Pet. Sci.

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“…To maintain a sufficient top tension of the TTR in case of riser buckling due to the platform motions, there is a tensioner system between each TTR and the production deck of the hull to connect them together. So far, there are two main types of tensioners applied in engineering: wireline riser tensioner (WRT) and direct-acting tensioner (DAT) (Lee et al, 2015). The hydraulic pneumatic tensioner (HPT) is a typical predominant DAT whose tension is directly acted on the tension ring of TTR by its hydraulic cylinder and piston (Wang and Liu, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…However, their works focused more on the hull, while risers were not included to form a coupled platform-riser system. Lee et al (2015) made a dynamic simulation of a wireline riser tensioner system of a mobile offshore drilling unit based on the multi-body system dynamics. Lee developed a WRT model on a semi-submersible platform, rather than a DAT, and its riser string is treated as a simplified elastic body.…”

Section: Introductionmentioning

confidence: 99%

Structural response analysis of the hydraulic pneumatic tensioner under its local failure based on a fully coupled TLP-TTR system

Hao

et al. 2020

Ocean Engineering

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The presented work studied the structural response of the hydraulic pneumatic tensioner (HPT) in a TLP-TTR system with failure of the tensioner cylinder. A fully coupled hull-tendon-TTR-tensioner model was established in AQWA to simulate the failure numerically. A specific HPT was modeled by considering 4 cylinders and the real-time stroke of each piston. A set of formulas was proposed to calculate the real-time tension including different components, e.g. Stribeck friction, in the tensioner. A riser array including 6 independent production TTRs and their tensioners were also modeled. The production TTR model was stacked up by different specific riser joints. The hydrodynamic force acting on the hull was obtained by using the 3D potential flow theory. The real-time tensions on different tensioner cylinders were obtained by using an in-house-developed program. Different environmental conditions, including a calm sea, regular waves, and extreme sea states, were considered in the simulations. In the results, the behaviors of different cylinders of the failed tensioner were presented. The results show that when an accidental local failure of the HPT occurs, the tension and stroke responses are still far from the designed-limits to induce a progressive failure.

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“…Its main role is isolating seawater, guiding drilling tools, and recycling drilling fluid. 1 The loads on the drilling riser are very complex because of the influence of ocean currents and drilling platform drift. Under these conditions, the deformation, stress, and bending moment are often large.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the mechanical response of a deep-water drilling riser to ocean currents and waves

Tang

Huang

Zhu

et al. 2019

Advances in Mechanical Engineering

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The drilling riser is an important piece of equipment used to link the subsea wellhead with the drilling platform. Its operating environment is extremely complex because of the effects of ocean currents, which can cause riser overload, fatigue, leading to economic loss. Therefore, in order to improve design and prevent premature failure of drilling riser, it is important to research the mechanical response to ocean currents. The effects of tension ratio and platform deflection on the lateral displacement, bending moment, and the stress of the drilling riser are analyzed, under actual working conditions and shear flow. The results show that the bending moment and lateral displacement of the drilling riser decrease significantly and the stress of the riser increases with increasing tension ratio. There is an increase in the lateral displacement of the drilling riser and the bending moment at the lower end of the drilling riser, with an increase in the initial offset of the offshore drilling platform. However, the initial offset of the offshore drilling platform has little effect on the stress of the riser. Under shear flow conditions, the lateral displacement, bending moment, and stress initially increase, then decrease, and finally stabilize. These results can be used to improve the design of drilling riser.

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Dynamic simulation of the wireline riser tensioner system for a mobile offshore drilling unit based on multibody system dynamics

Cited by 33 publications

References 7 publications

Mechanical analysis of deepwater drilling riser system based on multibody system dynamics

Mechanical analysis of deepwater drilling riser system based on multibody system dynamics

Structural response analysis of the hydraulic pneumatic tensioner under its local failure based on a fully coupled TLP-TTR system

Investigation of the mechanical response of a deep-water drilling riser to ocean currents and waves

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