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Sarma, Tanishka (author)This project explores the utilisation of the collective memory of vacant churches and the architectural elements within them as incentives for their transformation and reuse. The number of decommissioned churches in the Netherlands is increasing with rapid secularisation, and many churches remain empty. The purpose of this paper is to find a...master thesis 2023
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Tetteroo, Daan (author)All over the world, many offshore structures have been built in the last decades, both by the oil and gas industry and by the renewable industry. When these structures reach their end of life, they have to be removed. The removal is done in decommissioning projects. Many of those offshore structures are bottom founded. Of that amount, a big part...master thesis 2022
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Seegers, Jeroen (author)The slip joint connection is a relatively new alternative method for connecting offshore wind turbine towers to prior installed monopiles. It consists of two overlapping conical sections that together form a connection. There are several challenges left to be solved before the slip joint can be applied on a commercial scale. One of those...master thesis 2022
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Groenewegen, Rik (author)The first large offshore wind farms installed in the North Sea Region (NSR) soon reach their technical end of lifetime. The wind turbines in these farms will have to be decommissioned after power production has stopped. Currently offshore wind turbines are decommissioned based on a method called reversed installation, a time consuming and...master thesis 2022
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de Kruijf, Theo (author)Offshore Wind Farms (OWFs) have developed into an integral part of the European energy transition in the fight against climate change. The North Sea, with its excellent wind conditions and soil characteristics, as well as ports and industrial energy consumers nearby, has become the epicenter of offshore wind development. The coming years will...master thesis 2021
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Termote, Judith (author)Marine contractors as Heerema Marine Contractors (HMC) have made decommissioning part of their core business. Being the owner of two of the largest semi-submersible crane vessels (SSCVs), the choice for single lift jacket removal is straightforward. However, jackets in the Northern North Sea have a weight and height exceeding the crane capacity...master thesis 2021
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Karličić, Arso (author)A large number of light, modular topsides in the southern North Sea is planned to be removed in the near future. Heerema Marine Contractors (HMC) is currently not the most competitive in this market as smaller contractors can often provide cheaper removal solutions with the use of smaller heavy lift vessels. HMC therefore aims to find a more...master thesis 2021
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Eijgenraam, Koen (author)This study is focused on the decommissioning of a jacket with a heavy lift vessel. During the transport the crane suspended jacket hanging in air can start swinging due to swell waves. This can result in undesired risks such as a collision between the jacket and the vessel. To prevent this undesired risks from occurring a solution must be sought...master thesis 2020
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Bakker, Marieke (author)Amazing Grace will be needed for the removal of offshore platforms that are out of Pioneering Spirit 's reach. The base case design of Amazing Grace is an enlarged version of Pioneering Spirit (Figure 1). Amazing Grace uses mainly Quick drop Ballast tanks, releasing a lot of water at once, for lifting. Pioneering Spirit uses mainly a pneumatic...master thesis 2019
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Liu, Junrui (author)This project is based on 2 issues, the degradation of the ecosystem in North Sea and the decommission of offshore platforms.master thesis 2019
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Feenstra, Rinke (author)Allseas' Pioneering Spirit is the largest heavy lift vessel in the world. It uses its u-shaped bow to sail around an offshore platform and lift topsides up to 48.000t in a single lift. Despite being the largest vessel in the world, platforms exist that are simply too heavy, or too large to fit in between the bows of the vessel. Besides, smaller...master thesis 2018
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Schothorst, Quinten (author)In this thesis a model is set up to assess the economic viability of early stage buoyancy design concepts. The main research question is to find out if a versatile design approach to the buoyancy lifting concept, i.e. being able to take on multiple projects, can result in an economical viable solution for decommissioning offshore platform...master thesis 2018
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Jacobs, Peter (author)With the conversion of a heavy transport vessel into a crane vessel, Boskalis aims to strengthen its position in the offshore wind and decommissioning markets. The BOKALIFT 1, as the crane vessel will be named, is equipped with a 3,000 tonne crane and a class-2 Dynamic Positioning system. In order to utilise its exceptional large and strong deck...master thesis 2017
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Boltje, Diedert (author)This thesis contains the model development of a simulation model, to aid the selection of a heavy lift vessel for a North Sea decommissioning project. The model considers fixed steel platforms with maximum topside weight of 1.400 [tons].master thesis 2017
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Van Ewijk, E.M. (author)For more than a decade Jumbo has been active on the offshore market performing offshore installation projects with their two DP2 J-class vessels. However, the offshore market is a continuously growing and changing market and in order to keep up with these changes, Jumbo needs to innovate and investigate new activities within this offshore market...master thesis 2016
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Van Campen, D.M. (author)Pioneering Spirit, Allseas newest vessel, is specialised in offshore platform installation and decommissioning. The goal of this research is to find a solution for the interface between the topside lifting system and platform jacket legs without the necessity of lengthy preparation work to platform. In a research regarding platforms...master thesis 2016
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Eisses, D.A. (author)Fixed steel structures in the North Sea that are approaching end of life are increasing in mass and dimensions, this imposes challenges on the current decommissioning strategies. The main challenges arise during removal of the barge-launched substructures. In contrast to the topsides of these large structures the substructures cannot be easily...master thesis 2016
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Den Haan, B.C. (author)In the last decades a lot of oil platforms have been built. According to Infield (Infield, 2015), there are over 800 oil platforms out in the ocean. These platforms need to be decommissioned at the end of their lifetime. The Pioneering Spirit (PS), is a state-of-the-art multi-purpose twin hull vessel with the capability to decommission and...master thesis 2016
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De Groote, P.F.N. (author)The purpose of this thesis is to estimate the required forces for a hydraulic decommissioning cutting tool. The reason for this thesis topic is because of clear regulations and demand according offshore decommissioning. Abandoned offshore structures require to be decommissioned after their lifespan. The low oil prices these days and the pressure...master thesis 2015