Byford Dolphin

general

Name Byford Dolphin
Flag Bermuda
Owner Byford Dolphin Pte. Ltd
Manager Dolphin Drilling Ltd.
Year Built 1974. Last upgrade 2010
Design Aker H3
Classification DNV 1A1, Column Stabilised Drilling Unit

operatingparameters

Water Depth 1500 ft (458 m)
Maximum Drilling Depth 20,000 ft (6096 m)
Transit Speed Approx. 4,5 knots
Wind speed 169 ft/s (100 knots)
Max wave height 102 ft (31 m)
Length 355 ft (108,2 m)
Breadth 221 ft (67,4 m)
Depth 120 ft (36,6 m)
Variable Deck Load 3,021 mt
Liquid Mud 3,981 bbls (534 m3)
Bulk Mud/Cement 547 mt / 270 mt

drillingequipment

Derrick Continental Emsco 22 BDD 168 x 40 x 40 ft with retrofit 10 ft extension in 1996; 1,200,000 lbs static
Drawworks National 1625 DE (3 x 800 hp)
Rotary Continental Emsco T-4950, 49 ½”, 800 hp
Topdrive Varco TDS-4
Riser Tensioners 8 x Rucker Shaffer 80,000 lbs (Total 640,000 lbs capacity)
Motion Compensators Crown Mounted Compensator, Shaffer CMC-25-600-DA; 25 ft stroke; 600,000lbs capacity
Mud Pumps 3 x National 12-P-160 Triplex