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Scenarios where Surge is a risk are then investigated using the model set up. Pump characteristics (performance curves and operating speeds as well as moments of inertia) are also included in the model. Important features of the model include the pipeline profile (especially the elevations and location of high points), Pipeline and lining Material, inventory locations, connections (such as valves or pumps). This includes pipe lengths, diameters, restrictions and connections such as valves and pumps.
Gas lift pipesim hysys software#
Recommendations are made with reference to material selection for piping as well as flow parameters or design features which can prevent or mitigate the elevated pressures or temperatures in the class of investigated scenarios.Ī model of the crude or water pipe system is created in the software (such as TLNET / Pipeline Studio-Liquid or Bentley Hammer) is created. This results in high internal forces on pipelines particularly at bends or high gradient elevation changes. Slugging is also a typical feature of the flow that is commonly investigated. Typical scenarios involve pressure checks temperature checks and low temperature effects for high speed gas flow (such as venting, depressurisation or flaring) causing embrittlement are typical outcomes that are verified with these types of studies.
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Mass flow rates, fluid properties (such as density, specific heats and others) are added to the model and initial conditions including initial pressures temperatures, composition and quality are also specified.įlow scenarios are then modelled to obtain relevant pressures and temperatures. Thsi can automatically specify heat transfer coefficients ( specific heats etc) as well as pipe roughness which is important for turbulence quantification. steel or aluminium) as well as insulation (if applicable) should also be included in the model. Information for pipeline materials including the pipe material itself (e.g. Model information should include the pipeline lengths and elevations as well as other physical dimensions such as diameter and roughness.
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A model of the pipeline system including inlets and outlets and other features such as restrictions/orifices are created. The methodology for an OLGA study is relatively straight forward. Our staff have worked with companies around the world including BP Shell Woodside ADNOC Sour Gas ADNOC Gas Processing ADNOC Onshore ADNOC offshore Carigali Hess WorleyParsons FLUOR Technip Genesis and many other companies around the world. More complex problems where 3D fluid effects, turbulence or multiple flow phases (liquid gas and foam ) are present can be tackled by the use of computational Fluid Dynamics CFD. In general these problems are tackeled using PIPESIM HYSYS or OLGA. In addition the formation of liquid droplets in gas pipeflows can also cause heavy damage at pipe bends or junctions and vibrations can also be induced from high speed flows. Our expertise extends to venting flaring and Depressurisation calculations where the purpose is often to calculate the lowest temperature of steel/alloy fittings piping and vessels reach in order to prevent embrittlement which can cause catastrophic failures.