real case

North Sea Beatrice Platform as OREC

Beatrice Structure

AD AP B C
Type Steel Jacket Steel Jacket Steel Jacket Steel Jacket
Function Drilling, accomodation Production, power generation Drilling, accomodation Water injection
Water depth (m)
46
Jacket designer
Brown & Root, London
Jacket fabrication Dragados y Construcciones RGC, Methil Lewis Offshore, Stornoway
Jacket weight (tonnes) 2,300 2,100 2,000 515
Jacket dimensions (m) 56*60*34
Legs 8 8 6+4 4
Deck weight (tonnes) 2,400 2,300 2,850 520
Topside weight (tonnes) 2,800 5,000 2,137
Total weight (tonnes) 12,100 11,300 6,500 1,350
Overall structure height (m) 106.3 86.9
Deck clearance (m) 20.6 20.6
Main power 3*1500 kW 6*3.1 MW 3*8000 kW 2*20 kW
Cathodic protection Impalloy Galvalum III Impalloy Galvalum III Wilson Walton, Aluminium anodes Wilson Walton, Aluminium anodes

Beatrice Pipelines

From to length (km) Outside diameter Wall thickness Type Installation
Beatrice B Beatrice A 5.4 6" .500" oil laid 6/81 McDermott 'LB27': buried 'JB4'
Beatrice AP Beatrice B 5.4 8" .500" water laid 6/81 McDermott 'LB27': buried 'JB4'
Beatrice AP Beatrice C 4.8 water laid by Coflexip
Beatrice AP Nigg terminal 66 16" .500" oil laid 6/79 by Brown & Root, 'BAR 420@; trenched by 'BAR 331'

Beatrice Power Cables

From to length (km) diameter power Type Installation
Beatrice AP Beatrice B 6.2 3*185 mm2 1*11kV EPR Pirelli
Beatrice AP Dunbeath 26 3*120 mm2 1*33kV EPR Pirelli

The power cable via submarine has the following capacity: