Borgsten

GENERAL

Name: Borgsten Dolphin
Flag: Singapore
Owner: Borgsten Dolphin Pte Ltd
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: 1000 ft (304 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

MAIN DIMENSIONS

Length: 355 ft (108,2 m)
Breadth: 221 ft (67,4 m)
Depth: 120 ft (36,6 m) from Main Deck

CAPACITIES

Variable Deck Load: 3200 mt operating
Liquid Mud: 1700 bbls
Bulk Mud/Cement: 31931 ft3/ 14901 ft3

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