This paper investigates the integrated riser/vessel system which is subjected to random waves. Riser pipelines are the main components of the oil and gas offshore platforms. Whereas Iran country has been located on the fringes of Caspian Sea deep water, therefore study and research in this area is increasingly essential. The fluctuation of floating production causes the severe response and grea...

Offshore pipelines are usually constructed by the use of girth welds, while welds may naturally contain flaws. Currently, fracture assessment procedures such as BS 7910 are based on the stress-based methods and their responses for situations with large plastic strain is suspicious. DNV-OS-F101 with limited modifications proposes a strain-based procedure for such plastic loads. In this paper 3D ...

P. Ceppi, Department of Atmospheric Sciences, University of Washington, Box 351640, Seattle, Washington 98195-1640, USA. ([email protected]) Y.-T. Hwang, Department of Atmospheric Sciences, University of Washington, Box 351640, Seattle, Washington 98195-1640, USA. ([email protected]) X. Liu, Department of Atmospheric Sciences, University of Washington, Box 351640, Seattle, Was...

offshore pipelines used for oil and gas transportation are often buried to avoid damage from fishing activities and to provide thermal insulation. thermal expansion and contraction of the pipeline during operation can lead to lateral or upheaval buckling. a safe buried pipeline design must take into account a reliable evaluation of soil uplift resistance and pipe embedment depth. while the cost...

In the background of the offshore wind turbine monitoring applications, we analyzed the characteristics of the offshore wind turbine monitor and gave the architecture of the offshore wind turbine monitor system. We designed the system model of blade wear and vibration in offshore wind turbine, and combined with energy efficient data aggregation algorithm based on the specific application to mon...

PROBLEM Tragic marine and offshore accidents have caused serious consequences including loss of lives, loss of property, and damage of the environment. METHOD A proactive, risk-based "goal setting" regime is introduced to the marine and offshore industries to increase the level of safety. DISCUSSION To maximize marine and offshore safety, risks need to be modeled and safety-based decisions ...

Monitoring and early warning of submarine landslides could provide instant predictions for landslides, which is to avoid the destructive damage facilities such as pipelines optical cable, etc effectively. However, researches on landslide focus numerical simulation laboratory test, lacking support in-situ observation data. This paper established monitoring system by combining real-time data with...

This paper describes application areas for mobile service robots in offshore oil and gas producing environments, requirements and restrictions for the use of the robots together with a first prototype and its evaluation in a field test. The field of offshore oil and gas production is analyzed in the first part to identify possible application scenarios for mobile automation. It shows that there...