Scour below a subsea pipeline in time varying flow conditions

Scour Monitoring System for Subsea Pipeline Based on Active Thermometry: Numerical and Experimental Studies

A scour monitoring system for subsea pipeline based on active thermometry is proposed in this paper. The temperature reading of the proposed system is based on a distributed Brillouin optical fiber sensing technique. A thermal cable acts as the main component of the system, which consists of a heating belt, armored optical fibers and heat-shrinkable tubes which run parallel to the pipeline. Th...

Time-dependent Scour Depth under Bridge-submerged Flow

.................................................................................................................. ii ACKNOWLEDGEMENTS ............................................................................................iv LIST OF TABLES ...................................................................................................... viii LIST OF FIGURES ...............................

Alternative neural networks to estimate the scour below spillways

Artificial neural networks (ANN’s) are associated with difficulties like lack of success in a given problem and unpredictable level of accuracy that could be achieved. In every new application it therefore becomes necessary to check their usefulness vis-à-vis the traditional methods and also to ascertain their performance by trying out different combinations of network architectures and learnin...

Halliburton sets new deepwater record with subsea pipeline testing device

Improved FTA Methodology and Application to Subsea Pipeline Reliability Design

An innovative logic tree, Failure Expansion Tree (FET), is proposed in this paper, which improves on traditional Fault Tree Analysis (FTA). It describes a different thinking approach for risk factor identification and reliability risk assessment. By providing a more comprehensive and objective methodology, the rather subjective nature of FTA node discovery is significantly reduced and the resul...