Abstract
The dynamic action induced on offshore pipelines by deepwater S-laying is significant, and directly determines how the pipeline structures are designed and installed. Existing research has not fully investigated the benefits of coupling models of pipeline and pipelaying vessel motions. Therefore, this paper presents a coupled time-domain numerical model for examining the effect of coupled dynamic reactions. The coupled model takes into account the motion of the pipelaying vessel, surface waves, ocean currents, wind forces, pipeline dynamics, and contact between the rollers and the pipeline. A proportional, integral, derivative (PID) controller was used for simulating the control of the pipelaying vessel. The hydrodynamic forces that the pipeline experiences were modeled using the Morison equation. The model was solved using Newmark’s method and verified using OrcaFlex software. The model was then used to analyze practical operations: the laying of a 22″ gas export pipeline on the seabed by the pipelaying vessel HYSY201 in the Pingbei-Huangyan gas fields in the East China Sea. The effects of coupled factors on pipelaying vessel motions and pipeline dynamics were approximated. These effects included configurations, axial tensions, and bending moments. The results show a significant connection between the dynamic responses of the pipelines and pipelaying vessel motions.
Highlights
Submarine pipelines are considered to be the most efficient and feasible means of transporting large-scale gas and oil from offshore to onshore
In 1967, Plunkett showed that a deepwater pipeline can be assembled in an angular position on a lay barge and maintained at a predetermined high-tensile force while lowering it to the ocean bottom
A dynamic positioning (DP) system has been stinger adjustment system is located at the vessel aft
Summary
Submarine pipelines are considered to be the most efficient and feasible means of transporting large-scale gas and oil from offshore to onshore. Xie determined a pipe’s dynamic loading history for S-laying operations using a verified finite element various rollers in a single box of rollers were investigated and the emerging support torques (forces) model, and computed residual plastic deformations for pipe cross-sections after the pipe had from all roller boxes were computed and contrasted using commercial software [14]. Jensen established a model using nonlinear partial differential equations for the tension forces,ofbending and shearing sea applications; addedduring the effects of seabed dynamics pipeline moments, strings suspended from ainpipelaying vessel toJensen the seafloor pipelaying interactions, hydrodynamic drag,his andmodel restoration [16]. The coupled numerical model incorporates, among others, pipelaying vessel motions dynamics time-domain numerical model for analyzing a pipeline’s mechanical properties in S-laying and the contacts between stinger rollers and the pipeline. Seafloor by the pipelaying vessel HYSY201 in the Pingbei-Huangyan oil and gas fields in the East China Sea
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
