نتایج جستجو برای: gas pipelines
تعداد نتایج: 252929 فیلتر نتایج به سال:
Leak detection is a very important step in the production and maintenance of oil and gas pipelines. It is needed to check tightness specifications and to ensure other installation specifications are fulfilled. In this paper some pipeline leak detection methodologies are studied to come up with a design structure that could ease pipeline leak detection and monitoring via Google earth. A common d...
The oil and gas pipelines are considered as one of the most important offshore structures. In this study, the turbulent flow past piggyback pipelines and vortex shedding are numerically simulated under steady currents. Numerical simulation has been conducted for different values of flow velocities, diameter ratios, and gap ratios; in order to investigate how the hydrodynamic forces of the small...
This paper presents a special underwater robot for subsea pipelines inspection which is used to transport extracted oil and gas from oil platforms to onshore facilities. Due to the high pressure in the deep sea and the long pipelines, it is impossible to inspection by divers. Therefore underwater robot can be used to solve this problem. This paper investigate a hovering type of underwater vehic...
gas hydrates are a costly problem when they plug oil and gas pipelines. the best way to determine the hft and pressure is to measure these conditions experimentally for every gas system. since this is not practical in terms of time and money, correlations are the other alternative tools. there are a small number of correlations for specific gravity method to predict the hydrate formation. as th...
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