Decommissioning Offshore Structures by G Simpson (auth.), Prof. D. G. Gorman, Dr. J. Neilson (eds.)

By G Simpson (auth.), Prof. D. G. Gorman, Dr. J. Neilson (eds.)

Increasingly over the following couple of a long time, the oil and gasoline faces the complicated activity of decommissioning its offshore systems, pipelines and sub-sea gear as they succeed in the top in their operational features. Decommissioning comprises and integrates many designated features: engineering, environmental, financial, felony, political and defense concerns. a pragmatic method for elimination and disposing those buildings should be built which top meets the calls for of all of those varied elements. experts in those a variety of fields were introduced jointly for this quantity to give a contribution their tests of the location. the result's a big step towards the improvement of a co-ordinated method of the topic. it's crucial interpreting for all people who find themselves concerned with significant decommissioning initiatives, their attainable environmental influence and their implications in politics and law.

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Physical Statistics By the end of 1996 there will be 140 offshore fields producing oil and gas from over 200 installations in the UK sector. These installations are fixed steel jackets, concrete gravity substructures and floating/subsea production systems. The older installations are mainly fixed steel and concrete structures, generally of a major scale in the northern area and in the southern area mostly smaller scale steel jackets [2]. Approximately 5000 wells have been drilled of which half have been exploration and appraisal and have been presumably abandoned satisfactorily (plugged and cut).

17. Pipelines, where remaining trenched or covered do not require removal after purging and flooding. Some local exposed sections may require to be removed. 18. Modification for reuse would appear to be very unlikely by any profitdriven activity. 19. The issue of possible plant and materials recover and the economics of such activity is potentially important and needs examination. 20. All necessary cutting techniques are available but some need development for sub-sea application on a large scale.

Uk) 5. Abandonment of Offshore Installations and Pipelines under the Petroleum Act 1987: Guidance Notes for Industry. Dept. of Trade and Industry Consultative Document 4 May 1995. Technical Aspects 53 6. Decommissioning and Removal of Offshore Structures: Proceedings of Conference 19120 April1989. IBC Technical Services Ltd. 7. Removal of Concrete Platforms from the North Sea - Method and Costing Study Final Report: Ove Arup and Partners December 1977 (Confidential). 8. "Concrete Technology and Environmental Aspects Examples So Far" by Trym Edvardsson, Norwegian Pollution Control Authority.

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