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Nieuwenhuis, M.T.A. (author)
During gas production offshore, also water is produced. There are gas numbers available per well, but the water production is only known for several wells together. This thesis tries to model the water production per well based on the available data. This is done through a least-squares method. The report shows that it is very difficult to find...
master thesis 2014
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Oude Ophuis, R.B.A. (author)
Offshore barge mooring is considered a critical operation. The vessels need to be in close proximity, but may under no circumstance collide. Mooring lines and fenders are installed to keep the vessels in place. Experience has shown that lines tend to break occasionally; one of the reasons for this can be the interaction effect of the two vessels...
master thesis 2016
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Ilahibaks, Shaneeza (author)
In the design of offshore wind turbine generator (WTG) support structures, a large number of environmental parameters are used. The most important ones include the wind climate (wind speed and wind direction probability distributions), the wave climate (wave height and wave direction as well as peak frequencies of the waves, and water levels)...
master thesis 2020
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Huiskes, S.W.G. (author)
Heerema Marine Contractors is an offshore contractor who specializes in the installation and removal of a range of offshore facilities. This includes the installation of submarine pipelines in excess of 1500 [m] water depth. Higher water depths drive the pipeline designs to increase wall thickness. Another motive to apply a low D/t ratio is to...
master thesis 2016
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Duiverman, O.S. (author)
Since the rise of oil prices in 2007, the difference in gas prices between the US and Europe has increased steadily. The pressure to efficiently produce and maintain gas assets has thus also increased. On top of these external trends, ONEgas strives to be in the top quartile companies in the gas market. The integrated contractor of ONEgas, AJS,...
master thesis 2014
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De Blaeij, T. (author)
Monopiles are being used more extensively for offshore wind turbine foundation. Current guidelines on the construction of fixed offshore foundations still base the design of laterally loaded piles in sand on empirical data (p-y curves), originating from the oil and gas industry, from field tests executed in 1974 on 0.61 m diameter piles. However...
master thesis 2013
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IJzermans, Kasper (author)
A lack of knowledge on the economic feasibility and optimal design and operation of offshore hybrid wind-hydrogen parks is identified by utility companies and grid operators. This study reviews the techno-economic optimisation of an offshore wind-hydrogen park from a developer’s perspective and specifically considers the electrolyser technology...
master thesis 2021
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Yagüe Martín, Adrian (author)
Premature failures in large offshore Wind Turbines are often attributed to bearing failure despite gearboxes being designed and developed using the best bearing design practices. Furthermore, as turbine size and rated power increase, bearings display an enhanced tendency to fail. Unscheduled bearing replacement at sea is a complex, costly,...
master thesis 2020
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Luchs, M. (author)
The world is rapidly embracing networked technology and transitioning into one of hyperconnectivity, a term first coined by social scientists Anabel Quan-Haase and Barry Wellman. Increased connectivity provides benefits such as automation and, remote access and control of networks and equipment, thereby decreasing operational costs. Maritime and...
master thesis 2016
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Mommersteeg, M. (author)
De italiaanse oliemaatschappij A.G.LP. is van plan in de Middellandse Zee tussen Italië en Libië een offshore basis te ontwikkelen voor de winning van ruwe olie. In deze basis, Bouri Field, zullen eerst exploratieboringen verrich t worden, waarna later exploitatie plaats kan vinden. Tijdens de exploratiefase zullen er op de boorplatformen...
master thesis 1987
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Hunnego, P. (author), Schuhmacher, T.D. (author)
Het gebruik van beton voor de bouw van offshore platforms is tot op heden zeer beperkt in vergelijking met staal. Tot voor kort werd beton alleen toegepast voor grote waterdiepten in de Noordelijke Noordzee. Het gebruik van beton in ondiep water kent tot nu toe (1991) slechts twee voorbeelden: Ravenspurn en het platform voor de F3-locatie. Beide...
master thesis 1991
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Van Gerven, F.P.M. (author)
In the need for more green energy a prominent role is reserved for wind energy. Offshore wind energy in deeper waters capitalises on more efficient wind properties and increased public acceptance compared to onshore wind energy and wind farms close to shore. In the coming years the offshore wind market is expected to evolve rapidly, especially...
master thesis 2011
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Fokkema, D. (author)
master thesis 1987
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Rong, K. (author)
This thesis presents the comparative study of the three different dynamic analysis methods (quasi-static, frequency-domain, time-domain), with respect to the dynamic analysis of the Yme MOPUstor platform. The initiation of this thesis is Allseas engineering project. As a major contractor in the oil and gas industry, Allseas group is seeking a...
master thesis 2015
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Kraneveld, M.R. (author)
In conventional practice extreme design conditions for offshore structures are obtained very conservatively by extrapolating 3-hourly statistics of wind, wave and current data to a (say) 100 year return level, assuming that the 100-year extremes occur simultaneously and act in the same direction. This study involves an alternative approach...
master thesis 1991
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Calf, I.J. (author)
The out-of-plane bending of offshore mooring chains leads to a rapid deterioration of the chain, ultimately leading to failure in a period that is a fraction of the design-life. The deformation of the contact surface of the chainlinks leads to the interlocking of the link. This in turn causes the chain to behave like a bending beam. The...
master thesis 2015
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Kommer, J. (author)
For offshore installation projects Jumbo uses her J-class heavy lift crane vessels. The objects that need to be installed offshore are carried at deck or in the ship's hull. At location the object is lifted by the on-board heavy lift crane and slewed to the side of the ship. From the final overboard position the object can be lowered to the...
master thesis 2016
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Subramanian, K. (author)
The high stiffness to weight ratio of fibre reinforced composites have been utilized in improving the performance of various structures conventionally designed using metals. One such application is the gangway of the Ampelmann system used to transfer personnel safely from and to the offshore platform in sea. In the current work, a preliminary...
master thesis 2016
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Van Berckel, G.J.P. (author)
Brownfield projects are projects done on existing, live facilities. These type of projects have a poor performance record in terms of cost and schedule predictability. Based on findings from industry wide and internal company research, this study developed an approach to mitigate the cost and schedule growth by tailoring the development to...
master thesis 2016
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Taconis, T.W. (author)
A guyed tower offshore windmill has been designed to utilize the much higher wind energy production possible there in comparison to onshore. It will be sited in an intermediate water depth (=75 m) of a coastal region. The feasibility for North Sea conditions for a structure with a life of 25 years has been examined. A modified design, slender...
master thesis 1984
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