GENERAL

Name: Borgsten Dolphin
Flag: Singapore
Manager: Dolphin Drilling Ltd.
Year Built: 1975
Builder: Aker Group; Nylands Mekaniske Verksted, Norway; Upgraded 1985
Design: Enhanced Aker H3, Self Propelled Semi-Submersible
Classification: DNV + 1A1, Column Stabilised Drilling Unit

OPERATING PARAMETERS

Water Depth: 1500 ft (457,2 m)
Maximum Drilling Depth: 20,000 ft (6097 m)
Transit Speed: Approx. 4,5 knots

DRILLING EQUIPMENT

Derrick: Maritime Hydraulics 160 x 40 x 40 ft, top 18 x 18 ft; Static Hookload capacity 1,250,000 lbs  
Drawworks: National 1625-DE 
Rotary: National with 49 ½” opening
Topdrive: National Oilwell PS2 500
Riser Tensioners: 6 x Rucker 80,000 lbs, 50 ft travel (480,000 lbs total capacity) 
Motion Compensators: Rucker DSC-18-400-L-C-E; 500,000 lbs compensating and 1,000,000 lbs static load capacity
Mud Pumps: 3 x National 12-P-160

MACHINERY

Main Power: 4 x Hedemora V18/12A rated 2200 hp (4 x 1500 KW)
Emergency Power: 1 X MTU 8V396, Max continuous output 675 KW
Propulsion: In-line propulsion, 2 x 1700 bhp

SUBSEA SYSTEMS

Riser Details: 1,500ft Vetco MR-6E 21in OD with integral 4in 10,000 psi choke and kill lines and 55ft telescopic joint.