GVA 4500

The GVA 4500 is a drilling semi-submersible of well proven design. It is designed with sufficient capacity and flexibility to facilitate both exploration and production drilling. A fully integrated fluid handling system with segregated mud and brine system with tanks in the pontoons is one of the benefits. Others are favourable motion characteristics for efficient and reliable operation also in severe weather conditions.

 

Operation area               Moderate environment

Operation water depth   2,100 m (7,000 ft)

Drilling depth                  Up to 9,140 m (30,000 ft)
Regulations                    IMO MODO Code 2001, IMO DP Class 2

Classification                  DNV, ABS or Lloyd’s

Accommodation             160 persons

 

 

 

 

 MAIN PARTICULARS  

 Length over all:

 102.5 m

 336.3 ft

 Width over all:

 88.0 m

 288.7 ft

 Width outside pontoons:

 70.7 m

 232.0 ft

 Length of pontoons:

 89.7 m

 294.3 ft

 Height  of pontoons:

 9.1 m

 29.9 ft

 Height to Main Deck:

 36.5 m

 119.8 ft

 Height of deck box:

 8.0 m

 26.2 ft

 Four columns:

 13.7 x 14.5 m

 44.9 x 47.6 ft

 Transit draught:

  8.8 m

 28.6 ft

 Transit displacement:

 24,500 mt

 27,004 st

 Transit deck & column P.load:

 4,000 mt

 4,409 st

 Operation draught:

 20.0 m

 65.5 ft

 Operation displacement:

 34,100 mt

 37,590 st

 Operation deck & column P.load:

 5,500 mt

 6,060 st

 Survival draught:

 16.5 m

 54.1 ft

 Air gap in survival:

 12 m

 39.4 ft

 MAIN MARINE SYSTEMS/EQUIPMENT                   

 Power generation:

 8 x 3,500 kW               8 x 4,690 HP

 Thruster:

 8 x 2,800 kW               8 x 3,750 HP

 Thruster control:

 DP 2

 Mooring system:

 8 point mooring system

 Main deck cranes:

 2 x 60 mt                    2 x 66 st

 MAIN DRILLING SYSTEMS/EQUIPMENT

 Derrick for up to 124 ft stands:

 680 mt

 750 st

 Top drive:

 680 mt

 750 st

 Drawwork

 680 mt

 750 st

 Riser tensioners, wireline type:

 1,090 mt

 1,200 st

 Drilling riser, 75 ft joints

 2,500 kips flange rating

 Mud Pump:

 4 x 1,700 kW

 4 x 2,200 HP

 BOP Stack:

 15,000 psi, 5 rams

 TANK/STORAGE CAPACITIES

 Fuel oil:

 2,300

 14.464 bbls

 Drill water:

 3,400

 21,382 bbls

 Potable water:

 620 m³

 3,899 bbls

 Mud Storage, col+pont:

 800 m³

 5,031 bbls

 Mud pits:

 760 m³

 4,780 bbls

 Brine:

 570 m³

 3,585 bbls

 Base oil:

 620 m³

 3,899 bbls

 Bulk mud:

 500 m³

 17,657 cbft

 Bulk cement:

 300 m³

 10,594 cbft

Sack storage:

 7,500 sacks      

 7,500 sacks

 

References

Transocean Rather