scholarly journals Offshore Experience of the LM2500 Gas Turbine

1990 ◽  
Author(s):  
R. B. Spector ◽  
L. S. Cimino
Keyword(s):  
Gas Turbine ◽  
North Sea ◽  
Gas Turbines ◽  
Selection Criteria ◽  
Offshore Platforms ◽  
The North ◽  
Gas Compression ◽  
The North Sea ◽  
Exploration Drilling ◽  
Offshore Oil

Approximately 50 years of offshore oil exploration drilling and production have led to refined techniques and equipment selection criteria. Gas turbines have established themselves as the prime source of energy transfer in that sector of the industrial marketplace where space and weight are of major importance. The increased worldwide demand for petroleum has pushed offshore platforms into deeper waters requiring further sophistication in the allocation of space, weight and maintenance resources. The aeroderivative gas turbine meets the above criteria and in addition offers the platform designer high thermal efficiency and system flexibility coupled with ease of maintenance. This paper presents a summary of experience gained in over 10 years of operation of the General Electric LM2500 gas turbine on platforms in the North Sea. Although all of the circumstances that may be encountered cannot be adequately covered, highlighting the events which occurred in over one million hours of operation presents the potential user with a better understanding of the uniqueness of this type application. The advantages and the reliability of the aeroderivative gas turbine are also discussed. The LM2500 gas turbine was first introduced into off-shore operation in the Norwegian sector of the North Sea in November 1979, after successful application in gas compression and transmission duty on pipelines and other on shore facilities.

scholarly journals LM2500 Gas Turbines for Mobil Statfjord B Platform: The North Sea

1981 ◽  
Author(s):  
J. G. Kiernan
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
North Sea ◽  
Gas Turbines ◽  
The North ◽  
The North Sea ◽  
Power Generation Systems

The gas turbine compression and power generation systems for the Statfjord B platform required custom designed systems and significant design efforts. This paper summarizes many of the studies performed and reviews the overall project scope. The engineering considerations are presented to assist other gas turbine users and designers with their application considerations.

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.

Underreamed Footings Support Offshore Platforms In The North Sea

1973 ◽  
Author(s):  
Clarence J. Ehlers ◽  
William R. Bowles
Keyword(s):  
North Sea ◽  
Offshore Platforms ◽  
The North ◽  
The North Sea

Long-term dynamics of fouling communities found on offshore installations in the North Sea

2003 ◽  
Vol 83 (5) ◽  
pp. 897-901 ◽  
Author(s):  
P. Whomersley ◽  
G.B. Picken
Keyword(s):  
North Sea ◽  
Offshore Platforms ◽  
Fouling Communities ◽  
The North ◽  
Offshore Installations ◽  
Oil Export ◽  
The North Sea ◽  
Northern North Sea ◽  
Fouling Organisms

Inspection videos of four offshore platforms in the central and northern North Sea were used to study the development of fouling communities on clamps and guides of oil export risers over an 11-y period (1989–2000). Results from multivariate analyses (multi-dimensional scaling and analysis of similarities) indicated that distinct assemblages developed in different geographical locations. These differences were mainly due to the protracted development of theMetridium senile(Cnidaria: Actinaria) zone on the northern sector platforms. The vertical zonation of fouling organisms was similar on all installations, although the water depth at platform locations varied from 80 to 169 m, indicating that fouling organisms display a wide bathymetric tolerance. This study has highlighted the value of long-term data present in operational inspection videos for the study of fouling communities.

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.

scholarly journals Decommissioning Plans for Fixed Offshore Platforms: A Brief Revision

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Marcio Soares Pinheiro ◽  
Paulo Roberto Duailibe Monteiro
Keyword(s):  
North Sea ◽  
Rio De Janeiro ◽  
The State ◽  
Oil Field ◽  
Offshore Platforms ◽  
The North ◽  
Campos Basin ◽  
Heavy Lift ◽  
Long Time ◽  
The North Sea

Brazil began to explore its seas in the 60’s of the XX Century looking for petroleum. This journey began in the Northeast and the first oil field produced offshore was the Guaricema Field, in the State of Sergipe. During the 70’s, Petrobrás found oil in the Campos Basin, between the States of Espírito Santo and Rio de Janeiro, that became the most important oil province in Brazil until the discovery of the Pre-Salt province, in the Santos Basin. As these fields are producing for a long time, many of them are already completely depleted or their production is in way of to be not commercial anymore, and their facilities need to be decommissioned. This review of decommissioning practices of fixed offshore platforms carried out worldwide has focus on the removal of topside with special vessels designed for this purpose or with conventional methods (crane vessels + barge). It will show the benefits of using specialised heavy lift vessels to remove the topsides and move it to shore for dismantling / recycling / reuse / disposal. The cases for study were the successful decommissioning projects in the North Sea: Brent B/D, Valhall QP, Viking, Curlew, Eider A, Golden Eye and Leman, Iwaki-Oki, Halfweg Q1, Yme and Ninian North.

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