Deep water drilling riser mechanical behavior analysis considering actual riser string configuration

Mao, Liangjie; Liu, Qingyou; Zhou, Shouwei; Wang, Guorong; Fu, Qiang

doi:10.1016/j.jngse.2016.05.031

Cited by 66 publications

(20 citation statements)

References 22 publications

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“…The flow chart of the model solution process is presented in Figure 3. A comparison of the results of the numerical model with the experimental and analytical results of Mao et al 25 is shown in Figure 4. The results are in good agreement.…”

Section: Calibration Of the Modelmentioning

confidence: 95%

“…The drilling riser dynamics were studied by conducting FE simulations with the ABAQUS program 27 to validate the FE model of the riser, and results were compared with a vibration test of a riser made of polyvinyl (PVC) pipe performed by Mao et al 25 at Shanghai Jiaotong University. The parameters used in the numerical model were consistent with those used in the experiments conducted by Mao et al 25 The FE simulation model of the riser is shown in Figure 2. The riser was presented as a simple beam with hinged branches at the top and bottom ends, and the load acting on the riser was applied according to the reference data.…”

Section: Calibration Of the Modelmentioning

confidence: 99%

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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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Section: Calibration Of the Modelmentioning

confidence: 95%

Section: Calibration Of the Modelmentioning

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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“…In the recent years, both Yang et al [8] and Wang et al [9] considered the interactions of coupled factors during the dynamic analysis of a riser system, so that global dynamics of the riser can be obtained. Mao et al [10,11] designed an experimental system to measure the dynamic responses of the riser under shear flow with vortex-induced vibration. Wu et al [12] developed a dynamic model for offshore drilling riser based on the Hamilton principle and conducted the nonlinear vibration analysis of riser, and their results illustrated that both periodic motions and chaotic scenarios can be observed during vibration of the riser.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling and Dynamic Analysis of an Offshore Drilling Riser

Liao

Wang

Gao

et al. 2020

Shock and Vibration

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In this paper, a dynamic model of an offshore drilling riser is developed based on the Hamilton principle. The developed dynamic model is transformed into a finite element model by introducing an approximate solution which chooses the Hermite cubic interpolation function of bending beam element as the shape function. Thereafter, the standard Newmark integration is applied to numerically simulate the dynamic responses of offshore drilling risers with varied system parameters, including the length of riser, top tension ratio, and buoyant factor. Based on the results of numerical simulation, under the influences of sea wind, sea current, and the periodic excitation of sea wave, the offshore drilling riser experiences a fast lateral deflection phase in the beginning, a reciprocating deflection phase in the following long duration, and then, a periodic oscillation when it reaches the dynamic stable condition, respectively. The riser system working in deeper water with a higher top tension ratio and a lower buoyant factor shows more controllable vibration and less lateral deflection.

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“…Specifically, when a riser system works in shear flows, its maximal deflection is explored around 1/3 sea depth [15]. Liu et al developed an experimental system for testing the riser system working in deep water, their system was designed based on the system parameters of the 6th generation deep water drilling platform, HYSY-981 [16]. Summarily, the previous investigations mainly focused on the dynamic analysis of the riser system.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water

Liao

Zhou

et al. 2018

MATEC Web Conf.

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Abstract.A mathematical model of a drillstring-riser system is developed to analyze the system dynamics when drilling in deep water. For the proposed model, a riser and a drillstring are combined as a pipe-in-pipe structure, along which the interactions between the riser and the drillstring are introduced by a series of spring-friction units. Numerical simulations of the developed mathematical model are carried out by Abaqus in which the finite element method is adopted. Comparing with the riser deflection calculated by previously published models which exclude the influences of the drillstring-riser interactions, the maximal riser deflection obtained by using the proposed drillstring-riser system is relatively small. Namely, the drillstringriser interactions restrict the riser deflection. This finding indicates that, in a given safety margin of the riser deflection, the drillstring-riser system has stronger capacity of anti-deflection. Additionally, the influence of sea depth is investigated; the dynamic response of a drillstring-riser system drilling in deep water is obviously different from the corresponding condition drilling in shallow water. In order to maintain the drillstring-riser system work in a safe condition, the operations, such as thickening the riser wall, enhancing the control of the top drift, removing a part of buoyancy modules, decreasing WOB, and increasing the top tension of the riser, are suggested to be applied.

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Deep water drilling riser mechanical behavior analysis considering actual riser string configuration

Cited by 66 publications

References 22 publications

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

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

Mathematical Modelling and Dynamic Analysis of an Offshore Drilling Riser

Dynamic Analysis of a Drillstring-Riser System Drilling in Deep Water

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