Simulation analysis on load transfer of the marine pipe in pipe

Wang, Wenming; Xiong, Minghao; Chen, Ying‐Chun; Zhang, Shimin; De-fu, Yang

doi:10.1109/icma.2014.6885735

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…This research has also attracted the interest of some scholars and carried out corresponding research. In which, the bracing effect of the outer pipe was taken into account by some researchers [35,36] to analyze the static buckling deformation of a tubing string. Meanwhile, the commercial software were used by researchers [37,38] to investigate the impact force/friction force in the flow-induced vibration of slender structures in vertical well.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional nonlinear vibration model and fatigue failure mechanism of deepwater test pipe

Guo

Nie

et al. 2022

Nonlinear Dyn

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In deep-water test conditions, the riser-test pipe system (RTS) is subject to the vortex induced effect on riser, flow induced effect on test pipe and longitudinal/transverse coupling effect, which is prone to buckling deformation, fatigue fracture and friction perforation. To resolve this, the three-dimensional (3D) nonlinear vibration model of deep-water RTS is established using the micro-finite method, energy method and Hamilton variational principle. Based on the elastic-plastic contact collision theory, the nonlinear contact load calculation method between riser and test pipe is proposed. Compared with experimental measurement results, calculation results of the proposed vibration model in this study and the single tubing vibration model in our recent work, the correctness and effectiveness of the proposed vibration model of the deep-water RTS are verified. Meanwhile, the cumulative damage theory is used to establish the fatigue life prediction method of test pipe. Based on that, the influences of outflow velocity, internal flow velocity, significant wave height, as well as top tension coefficient on the fatigue life of test pipe are systematically analyzed. The results demonstrate that, first, with the increase of outflow velocity, the maximum alternating stress, the annual fatigue damage rate increased and the service life decreased significantly. The locations where fatigue failure of the test tube is easy to occur are mainly distributed at the upper "one third" and the bottom of test pipe. Second, with the increase of internal flow velocity, the "one third effect" of the test pipe will decrease, and is shown "the bottom damage effect", which needs the attention of field operators. Third, during field operation, it is necessary to properly configure the top tension coefficient so that there can be a certain relaxation between the riser and the test pipe, so as to cause transverse vibration and consume some axial energy and load. The study led to the formulation of a theoretical method for safety evaluation and a practical approach for effectively improving the fatigue life of deep-water test pipe.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional nonlinear vibration model and fatigue failure mechanism of deepwater test pipe

Guo

Nie

et al. 2022

Nonlinear Dyn

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Challengeable Engineering Design of a Deck for Coiled Tubing Well Abandonment on a Dynamic Positioning Barge

Bahrami

Seyednia

Barzoki

et al. 2019

Day 2 Wed, December 04, 2019

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Ship collision with offshore platform is one of the rare events in oil and gas industry and generally associates with huge physical and financial damage. An oil tanker collided with a jacket in the South Pars gas field and caused tough conditions for the operator to restore the jacket and wells to their original state. The crucial stages after the accident were killing a perforated well, wreck removal and cutting the wells below the section they had been bent or distorted and finally the wells abandonment by cementing coiled tubing operation on a dynamic positioning barge. This paper focus on engineering design of a platform for coiled tubing injector head and pressure control equipment on the barge as well as finding a way that coiled tubing string pass through the gap between the platform and the underwater cut point of wells. For this purpose, a deck was proposed to build on the barge having a heavy duty flexible steel pipe extended from the deck to inside the wells cut point. Various measures should be implemented to design this structure in order to have an operational safe method. The structure had to have sufficient strength to resist the forces applied on it especially during the operation in the predominant weather condition of Persian Gulf in the monsoon season. Therefore, a comprehensive study was conducted to determine stresses applied on the structure subjected to different types of wave velocities using finite element method. The engineering design and simulation led to construct the proposed deck extending over the port side of the barge and elevating between the main deck and mezzanine deck with a long 4" flexible steel pipe at its bottom. In order to verify the engineering design and simulation before the operation, the structure load tested up to 40 metric tons. This paper will peer over the challengeable engineering design of the deck for coiled tubing well abandonment under the condition of insufficient offshore facility.

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Three-Dimensional Nonlinear Vibration Model and Fatigue Failure Mechanism of Deep-Water Test Pipe

Guo

Nie

et al. 2021

Preprint

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In deep-water test conditions, the riser-test pipe system (RTS) is subject to the vortex induced effect on riser, flow induced effect on test pipe and longitudinal/transverse coupling effect, which is prone to buckling deformation, fatigue fracture and friction perforation. To resolve this, the three-dimensional (3D) nonlinear vibration model of deep-water RTS is established using the micro-finite method, energy method and Hamilton variational principle. Based on the elastic-plastic contact collision theory, the nonlinear contact load calculation method between riser and test pipe is proposed. Compared with experimental measurement results, calculation results of the proposed vibration model in this study and the single tubing vibration model in our recent work, the correctness and effectiveness of the proposed vibration model of the deep-water RTS are verified. Meanwhile, the cumulative damage theory is used to establish the fatigue life prediction method of test pipe. Based on that, the influences of outflow velocity, internal flow velocity, significant wave height, as well as top tension coefficient on the fatigue life of test pipe are systematically analyzed. The results demonstrate that, first, with the increase of outflow velocity, the maximum alternating stress, the annual fatigue damage rate increased and the service life decreased significantly. The locations where fatigue failure of the test tube is easy to occur are mainly distributed at the upper “one third” and the bottom of test pipe. Second, with the increase of internal flow velocity, the “one third effect” of the test pipe will decrease, and is shown “the bottom damage effect”, which needs the attention of field operators. Third, during field operation, it is necessary to properly configure the top tension coefficient so that there can be a certain relaxation between the riser and the test pipe, so as to cause transverse vibration and consume some axial energy and load. The study led to the formulation of a theoretical method for safety evaluation and a practical approach for effectively improving the fatigue life of deep-water test pipe.

show abstract

Simulation analysis on load transfer of the marine pipe in pipe

Cited by 3 publications

References 14 publications

Three-dimensional nonlinear vibration model and fatigue failure mechanism of deepwater test pipe

Three-dimensional nonlinear vibration model and fatigue failure mechanism of deepwater test pipe

Challengeable Engineering Design of a Deck for Coiled Tubing Well Abandonment on a Dynamic Positioning Barge

Three-Dimensional Nonlinear Vibration Model and Fatigue Failure Mechanism of Deep-Water Test Pipe

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