GE to power pre-salt semisubmersible drilling vessels
The Brazilian national oil company Petroleo Brasileiro SA (Petrobras), Sete Brazil Participaçoes SA (Sete) and its contractor Keppel Fels do Brazil SA (Keppel) have selected GE’s Power Conversion electrical solutions to power and propel the first series of six semisubmersible drilling rigs.
Keppel is the contracting shipyard designing and building the drilling rigs based on its proprietary DSS 38E design.
Sete is contracting Keppel for the design and construction based on Petrobras’s pre-salt operations requirements.
These pre-salt oil and gas fields are located between 200 and 300 kilometers from the Brazilian shore covering a 800 kilometers distance from north to south across the Santos Basin, Campos Basin and Esperito Santo Basin.
Located in ultra deep water, up to 3,000 meters deep, in the pre-salt rocks as below the earth crest, these oil and gas fields lie up to 5,000 meters below the seabed.
GE electrical solution for more reliability and safety
This electrical solution adopted on the drilling rigs will apply to:
– Power generation
– Drilling equipment
Petrobras, Sete and Keppel adopted the electrical solution as it provides significant advantages on the conventional mechanical solutions:
– Higher safety and easier redundancy in separating compartments.
– Redundant electrical power and control cabling installation
– Prevant total backout of the propulsion and power supply system
– Safety functions decoupled from other operations to guaranty the control of the vessel
For the six vessels, GE was awarded a $120 million order, meaning a cost of $20 million per vessel for this electrical solution.
In addition to the performances and safety requirements, Petrobras requests a minimum content for all its $224 billion capital expenditure pre-salt exploration and production program.
At the drilling rigs level, Sete is working according to 62% local content in Brazil.
GE Power Conversion in charge of the electrical solution will also execute a part of its $120 million order through its Brazilian production units to meet these local content requirements.