Monitoring of flexible oil lines using FBG sensors

Abstract

Thorough the last two decades, oil and gas reservoirs discovered and developed in deep and ultra deep waters have continuously posed challenges to petroleum exploration and production activities in offshore basins. Maintaining optimum flow rates of oil and gas from subsea wellheads to surface processing facilities demands new technological solutions for petroleum companies operating in such frontiers. Integrity assurance of structures, equipment, and flow lines plays a major role in maximizing offshore production systems availability while at the same time keeping safety, operational, and environmental risks at minimum levels. In this scenario, implementation of permanent health monitoring solutions must take into account the environment of oil and gas production facilities, where installations in hazardous classified areas require explosion and fire-proof instrumentation. In this context, optical fiber sensors offer an attractive alternative to electrical sensing technologies, which, until now, have been the primary choice by maintenance personnel at offshore production units.

Flexible Riser Monitoring Using Hybrid Magnetic/Optical Strain Gage Techniques through RLS Adaptive Filtering

“…Fiber-optics Bragg grating (FBG) sensors technology has also been used to monitor flexible riser. In [21] two methodologies to monitor strain in flexible risers are developed. In the first approach, permanent FBG strain gages were installed on all wires of the armor layer.…”

Packaged FBG sensors for real-time stress monitoring on deep-water riser

“…From 2002 to 2010, many researchers found that the FBG sensors on flexible pipelines or risers can be used to monitor their fracture failure or vortex-induced vibration and the results are turned out to be satisfying [10][11][12] . In 2004, D. Brower applied optical fiber sensors in structural performance tests in deepwater oil fields 13 .…”

Monitoramento De Risers Flexíveis Através De Técnica Baseada Em Vibrações

“…Nesta seção serão apresentados alguns projetos de pesquisa alinhados com o monitoramento e inspeção dos risers. [14,35]. Ao ocorrer o rompimento de um ou mais arames, deformações circunferenciais, longitudinais e torsionais são transmitidas para a capa do riser, que passa a exibir deformações dinâmicas com uma assinatura diferente da inicial.…”