Results 91 to 100 of about 1,280 (210)

Vortex Induced Vibrations of Marine Risers

open access: yes, 2012
SummaryThis Master s Thesis goal is to present fundamental physical aspects of Vortex Induced Vibrations (VIV) of marine risers, and outline methods for suppression of VIV. Main emphasis has been given to the use of strakes, and relevant theories connected to strakes influence on excitation of riser, riser response and drag is presented.
openaire   +2 more sources

Riser Displacement Cleaning Tool Helps Efficiently Displace Drilling Fluid from Marine Riser on Semi-Submersibles During Disconnects

open access: yes, 2010
Periodically on semi-submersibles, it is required to perform planned and occasionally unplanned disconnects of the marine riser from the subsea BOP stack. The reasons are diverse but always result in a change out of fluids in the riser.
Thor-Petter Herigstad   +3 more
core   +1 more source

Identifying and evaluating high risk areas and challenges on marine drilling riser system in relation to deepwater problems [PDF]

open access: yes, 2012
The main concerns during drilling operations are riser integrity and maintaining well control. This thesis has mainly been focusing on the problems and challenges faced with the marine riser system to illuminate high risk areas related to riser ...
Iversen, Alexander
core  

A Method for Analysis of a Prototype Articulated Multiline Marine Production Riser System

open access: yes, 1977
This paper describes a newly developed nonlinear computer program that predicts internal reaction forces and motions of a multiline marine production riser exposed to wave and current forces. The paper also presents an analytical method that accounts for
J. B. Caldwell, W. E. Gammage
core   +1 more source

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities

open access: yes, 2010
A general low-order fluid-structure interaction model capable of evaluating the multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures is presented.
Narakorn Srinil, Srinil, N.
core   +1 more source

Numerical Simulation of Burst Failure in 2.5-Inch Unbonded Flexible Riser Pressure Armor Layers

open access: yesMetals
Unbonded flexible risers have been widely used in the field of offshore engineering in recent years due to their excellent performance in extreme dynamic marine environments, structural compliance, low installation cost, and low quality.
Xiaoya Liu   +6 more
doaj   +1 more source

Marine Structural Health Monitoring with Optical Fiber Sensors: A Review. [PDF]

open access: yesSensors (Basel), 2023
Chen S   +8 more
europepmc   +1 more source

Vertical pipe in pipe marine riser - NRC tow tank experiments

open access: yes, 2009
Marine environments with harsh conditions such as those off the coast of Newfoundland and Labrador, NL, Canada, place serious operating and performance demands on offshore structures built for oil and gas production.
Derradji-Aouat, A.
core   +1 more source

Experimental Research on the Disc-ball Attachment for Suppressing Vortex-induced Vibration

open access: yesShiyou jixie, 2020
In order to investigate the effect of the size and layout of the disc-ball attachment, a new device used to suppress the vortex-induced vibration of the marine riser, an experimental study was conducted on four factors including pitch, number of threads,
Liu Zhihui   +3 more
doaj  

Influence of joint stiffness on the free vibrations of a marine riser conveying fluid

open access: yes, 2008
The marine risers are generally used as the main transport means for economic materials and resources discovered undersea. In general, the marine risers are secured at either an offshore platform or a vessel.
S Chucheepsakul (20190834)   +3 more
core  

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