Q4000 Subsea Well Intervention Vessel | Subsea Services Alliance

Q4000

DP3 semisubmersible vessel enables subsea well intervention and construction in water depths to 10,000 ft

The Q4000 DP3 semisubmersible vessel at sea
2002
Year built
135
persons accommodated
312 ft
Overall length
38-ft × 20-ft [11-m × 6-m] moonpool
7 3/8-in, 10,000-psi [69-MPa], 10,000-ft-rated intervention riser system (IRS) permanently onboard
10,000-ft [3,048-m] heavy-weather ROV system
Overall deck capacity of 4,000 metric tons

The Q4000 DP3 semisubmersible vessel entered service in the Gulf of Mexico in 2002 and has since built one of the most extensive well intervention track records of any vessel in the world.

Its stable design and unique open deck make the Q4000 an optimal platform for a wide variety of tasks, including subsea well intervention, field and well decommissioning, installation and recovery of subsea equipment, well testing, and emergency well containment.

Among the Q4000’s notable features are its 600-US-ton multipurpose tower capable of fulfilling all traditional derrick roles, deepwater crane with lifting capacity to 360 metric tons, and work crane rated to 160 metric tons.

The open deck plan enables quick and efficient loading and offloading of project supplies and equipment in a single lift.

Q4000 DP3 Semisubmersible Vessel
Enables subsea well intervention and construction in water depths to 10,000 ft