Allseas
 |
|
| Private | |
| Industry | offshore pipelaying undersea construction |
| Founded | 1985 |
| Founder | Edward Heerema |
| Headquarters | Châtel-Saint-Denis, Switzerland |
|
Number of employees
|
3,000 |
| Website | www.allseas.com |
Allseas Group S.A. is a Swiss-based offshore contractor specialising in pipelay, heavy lift and subsea construction. The company, founded in 1985 by owner and president Edward Heerema, employs 3,000 people and operates worldwide.
Allseas is an international offshore contractor specialising in the execution of large and complex projects, covering pipeline installation, platform installation and removal, and the installation of subsea infrastructure. The company provides support to clients already in the conceptual design stage and offer services for project management, engineering, fabrication, procurement, installation and commissioning.
The Allseas Group is headquartered in Châtel-Saint-Denis, Switzerland. Allseas Engineering B.V. with offices in Delft, Eindhoven and Enschede, the Netherlands, provides project management and engineering services to the group. The company also operates project and engineering offices out of Australia, Brazil and the USA.
Allseas operates a versatile fleet of specialised heavy-lift, pipelay and subsea installation vessels designed and developed in-house. Allseas has installed over 20,000 km of subsea pipeline worldwide using S-lay technology, with diameters ranging from 2" to 48". The company's first vessel, Lorelay, was launched in 1986, and was the world's first pipelay vessel to operate on full dynamic positioning.
In 1998 Allseas added the 300 m long Solitaire to its fleet. The vessel has a pipe carrying capacity of 22,000 t and has achieved pipelay speeds in excess of 9 km per day. In 2006, while working on the Atwater Valley and Independence Trail projects in the Gulf of Mexico, Solitaire set new depth records, laying 10-inch pipeline in 2775 m (9100 ft) water depth and 24-inch pipeline in 2550 m (8370 ft) water depth.
Allseas’ latest vessel, the 382 m long, 124 m wide dynamically positioned platform installation / removal and pipelay vessel Pioneering Spirit, entered service in August 2016. With a topsides lift capacity of 48,000 t, a jacket lift capacity of 25,000 t and a motion compensation system, the vessel can install and remove topsides and jackets in a single lift in wave heights up to 2.5 m significant.Pioneering Spirit set a world offshore lifting record of 13,500 t with her first commercial lift on August 22, 2016; removal of the Yme mobile offshore production unit for Repsol.
Allseas has committed to building an even larger version of the same design, Amazing Grace, which is scheduled to be delivered in 2023.
Allseas was founded in January 1985 by Edward Heerema, son of the late Pieter Schelte Heerema, founder of the Dutch offshore construction and installation company Heerema Marine Contractors. Offices subsequently opened in The Hague (the Netherlands) and Châtel-Saint-Denis (Switzerland).
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