Lorelay   is a versatile vessel optimised for the execution of small and medium diameter pipeline projects of any length in unlimited water depths, and for associated work such as the installation of risers and subsea protection frames.

First pipelay vessel on dynamic positioning

As the world’s first pipelay vessel to operate on full dynamic positioning when she was launched in 1986, Lorelay   represented a new generation of offshore pipelaying vessel. Her ship-shape allows for a high transit speed, while a large pipe storage capacity means she is less dependent on offshore pipe supply.

Precisely and safely positioned pipelay

Lorelay   can position precisely and safely in congested areas and lay pipes in very deep water. Lorelay  has laid many deepwater steel pipelines; in 1996 she set a new record for deepwater pipeline installation, laying a steel pipe to a depth of 1645 m (5400 ft) in the Gulf of Mexico.

Learn more about Allseas' fleet and equipment.

Technical design

Vessel specifications

Length overall227 m (745 ft) 
Length between perpendiculars150 m (492 ft) 
Breadth26 m (85 ft) 
Depth to main deck16 m (51 ft) 
Operating draught6–9 m (20–30 ft) 
Maximum speed16 knots 
Total installed power17,760 kW 
Dynamic positioning systemFully redundant, class 3 Kongsberg K-Pos DP-22, K-Pos DP-12 and cJoy system
Accomodation225 persons 
HelideckMaximum take-off weight 12.8 t, suitable for Sikorsky S-61N and S-92 helicopters 
Deck cranesSpecial purpose crane of 300 t (660 kips) at 14 m (46 ft) main hoist
Pipe transfer crane of 16 t (40 kips) at 33 m (108 ft) main hoist  
Work stationsFiring line with 6 (single joint) welding stations, 1 NDT station and 3 coating stations  
Installed tension capacity3 x 55 t (3 x 120 kips). Optional 4th tensioner, 100 t (220 kips) 
Pipe cargo capacity7200 t 
Pipe diametersFrom 2" to 34" OD 
ClassificationsLR 100 A1, Pipe Layer, *IWS, LI, () LMC, UMS, DP (AAA) 
Bow thrusters2 x 2550 kW Schottel-Lips tunnel thruster,s 1 x 3000 kW Schottel-Lips retractable azimuth thruster
Stern thrusters2 x 5000 kW Wärtsilä azimuth thrusters, 1 x 6000 kW Schottel-Lips fixed-pitch propeller
AHC winch150 t (330 kips) at 20 m (66 ft)
Port of registryValletta, Malta

Lorelay  projects