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Title: Deconstruction and disposal of offshore platform topsides
Author: Shaw, Darrel
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 1999
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Since the aborted dumping of the Brent Spar in the North East Atlantic in 1995 and subsequent legislation requiring both total removal of platforms and banning of disposal at sea by OSPAR in 1998, operators of offshore platforms have been left with substantially increased decommissioning liabilities. The desire to reduce these liabilities has required the offshore industry to develop new, more cost effective technology for platform removal. The author's sponsoring company, Reverse Engineering Limited (REL), has been involved with the development and engineering of a new technology, the Versatruss System. This system has been used for lifts up to 1,350 short-tons in the Gulf of Mexico and can potentially remove large topsides in one piece, thus allowing the possibility of their reuse. As such, this system provides an ideal opportunity for competitive technology development in the North Sea. This thesis therefore focuses on the development of the Versatruss System for use in decommissioning projects in the North Sea environment. Both a conceptual design methodology and a high level operating procedure for North Sea application are presented. Outline frameworks for the planning, management and execution of the onshore deconstruction and disposal phase of platform decommissioning projects have also been developed by the author. In order to provide a balanced assessment of this technology, procedures for comparing the Health, Safety and Environmental (HSE) impacts of the Versatruss System with established removal and disposal techniques, along with worked examples, are also presented. Various economic models covering all phases of the decommissioning operation have been developed by the author over the period of the project. These models include for the decommissioning, removal and disposal of individual or groups of platforms by both established and new technologies. These models are presented within. A preliminary marketing analysis and recommendations for the development of a formal marketing strategy for Versatruss have also been developed. This work has shown that Versatruss can offer a potential alternative to traditional platform removal techniques. Recommendations for further development are not only confined to design and engineering, but also to the organisation for the commercial exploitation of the Versatruss technology.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (D.Eng.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available