Marine & Offshore

Blackford Dolphin

Project information

Project Blackford Dolphin

The semi-submersible drilling rig Blackford Dolphin was upgraded to increase the maximum drilling depth. The rig was fitted with additional outboard columns (2 per side), as well as additional columns with sponsors and deck extensions to either end of its length. She was also fitted with a completely new drilling installation and power plant. This megaproject started as a small refurbishment, but turned out to be a complete new build project. Blackford Dolphin, the former Ocean Liberator, was built in 1974, has been refurbished and had her life span extended by 20 years during this project. The upgraded drilling unit has a drilling depth capability that has been increased from 600 ft to 7,000 ft water depth, enabling her to operate in deep water environments.

Keppel Verolme for Fred Olsen ASA 
Keppel Verolme in Rozenburg executed the upgrade for Blackford Dolphin Pte Ltd, a wholly-owned subsidiary of Fred Olsen Energy ASA.

Croon managed, engineered, integrated, installed and commissioned the
following systems:

  • • All cabling and cable trays
  • • Low-voltage system, switchgear and distribution panels
  • • Telephone, general alarm and public address system
  • • Control desks
  • • Fire detection system
Main data
Name Blackford Dolphin
Type of vessel Semi-submersible Drilling Rig
Project execution 2008
Water depth ratin 7,000 ft
Drilling depth 30,000 ft
Length overall 113.4 m
Breadth overall 85.95 m
Height 36.57 m
Capacity 130 persons
Classifications DNV
Owner Fred Olsen ASA