First Jack-Up Production Platform in the North Sea

1974 ◽  
Vol 26 (03) ◽  
pp. 323-325
Author(s):  
Aylmer P. Cheng ◽  
Jerry F. Kelewer
Keyword(s):  
North Sea ◽  
The North ◽  
Production Platform ◽  
The North Sea ◽  
Jack Up

Gas Turbine Intake Filter Systems Related to Offshore Platform Installations

1985 ◽  
Author(s):  
M. H. P. Kimm ◽  
D. Langlands
Keyword(s):  
Gas Turbine ◽  
North Sea ◽  
Specific Reference ◽  
Ideal Condition ◽  
Air Filtration ◽  
Contributing Factors ◽  
The North ◽  
Offshore Installations ◽  
Production Platform ◽  
The North Sea

This Paper covers various aspects with respect to the selection and operation of air filtration associated to offshore gas turbine installations. As the Offshore North Sea industry moves into its second decade, Operators are still trying to improve machine availability and reduce maintenance costs. One of the main contributing factors in their failure to achieve the ideal condition has been poor inlet air filtration caused by bad design and incorrect filter selection. The majority of offshore installations are equipped with filter systems which were originally designed for use on ocean-going vessels. The performance of what has become known as the “High Velocity Salt Eliminator System” has, in most cases, been unsatisfactory, thereby creating a necessity for a continuing search into alternative filter systems. The experiences of most Operators in the North Sea have been very similar, and examination of the platform environment explains why this should be the case. To emphasize the affects of poor air filtration and the savings that can be achieved by the Operator in recognising and correcting the problems, specific reference is made to the experience of Mobil North Sea with the Beryl Alpha Production Platform.

scholarly journals Diel echolocation activity of harbour porpoises (Phocoena phocoena) around North Sea offshore gas installations

2009 ◽  
Vol 66 (4) ◽  
pp. 734-745 ◽  
Author(s):  
Victoria L. G. Todd ◽  
William D. Pearse ◽  
Nick C. Tregenza ◽  
Paul A. Lepper ◽  
Ian B. Todd
Keyword(s):  
North Sea ◽  
Gas Production ◽  
Diel Activity ◽  
Phocoena Phocoena ◽  
Drilling Rig ◽  
The North ◽  
Production Platform ◽  
The North Sea ◽  
Exploration Drilling ◽  
Passive Acoustic

Abstract Todd, V. L. G., Pearse, W. D., Tregenza, N. C., Lepper, P. A., and Todd, I. B. 2009. Diel echolocation activity of harbour porpoises (Phocoena phocoena) around North Sea offshore gas installations. – ICES Journal of Marine Science, 66: 734–745. Echolocation clicks of harbour porpoises (Phocoena phocoena) were detected with T-PODs, autonomous, passive, acoustic-monitoring devices, deployed from an offshore-exploration-drilling-rig and gas-production-platform complex in the Dogger Bank region of the North Sea from 2005 to 2006. Echolocation-click trains were categorized into four phases of the diel cycle: morning, day, evening, and night. Porpoises were present near (<200 m) the platform, and there was a pronounced diel pattern in echolocation activity; the number of porpoise encounters (visits) was greater by night than by day. The number of click trains with a minimum inter-click interval of <10 ms also increased at night. This was confirmed by a comparison of the ratios of feeding buzzes to search-phase clicks (feeding buzz ratios) and an analysis of the changes in pulse-repetition frequencies within each train. A reasonable interpretation of this pattern was that porpoises were feeding below or around the platform at night. The evidence for changes in activity during the morning and evening was less clear, so these may be transitional phases. The pattern of porpoise-echolocation behaviour around this platform is related most probably to the diel activity of their prey. If porpoises cluster regularly around such installations within 500-m shipping exclusion zones, they may be omitted from population surveys. We conclude that offshore installations may play an important role as nocturnal porpoise-feeding stations in an overfished environment, but that further replicated and controlled studies are required. These findings should be taken into consideration during offshore-installation-decommissioning decisions in the North Sea.

Oil Rig Disaster in the North Sea

1985 ◽  
Vol 1 (S1) ◽  
pp. 357-359
Author(s):  
Helge Bryne ◽  
Eilif Dahl
Keyword(s):  
North Sea ◽  
Oil Production ◽  
Oil Field ◽  
Mobile Platform ◽  
Norwegian Coast ◽  
Drilling Rig ◽  
The North ◽  
Production Platform ◽  
The North Sea ◽  
Oil Rig

Since oil was found under the North Sea in the mid 1960's, oil production now plays an important part in Norwegian economy. A major oil field isEkofisk, between Norway and Britain (Figure 1). TheAlexander Kielland, one of the rigs atEkofisk, was a mobile platform of the pentagon type, floating on 5 columns, 150 nautical miles of f the Norwegian coast. It was developed and built as a drilling rig, but was used as an accommodation platform since delivery in July 1976. OnMarch27,1980, theAlexander Kiellandrig lay at anchor on theEkofisk field, close to the production platform EDDA.

The influence of geotechnical engineering on the evolution of offshore structures in the North Sea

1981 ◽  
Vol 18 (2) ◽  
pp. 171-178 ◽  
Author(s):  
R. E. Gibson ◽  
B. E. W. Dowse
Keyword(s):  
North Sea ◽  
Geotechnical Engineering ◽  
Offshore Structures ◽  
Physical Factors ◽  
The North ◽  
Oil Storage ◽  
Production Platform ◽  
Offshore Oil Production ◽  
The North Sea ◽  
Offshore Oil

The selection of the type of drilling or production platform appropriate to a particular off shore site depends, chiefly, upon the likely severity of the marine environment, the nature of the seabed, and the geotechnical properties of the underlying soils and whether there exists a requirement for on-site oil storage. Although these physical factors have all played important roles in shaping the evolution of offshore structures, particularly in the North Sea, economic considerations and the national preferences of client companies have on occasion been decisive.This paper traces the evolution of offshore oil production structures for the North Sea with particular emphasis on the role played by geotechnical engineering during the conception, design, and construction of some of the largest movable structures in the world.

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