Semisubmersible drilling rigs

Over a period of more than 40 years, Aker Solutions has been responsible for the design and construction of a large number of the semi-submersible drilling rigs delivered for worldwide operations. Our track record is the result of close co-operation with leading drilling operators and oil companies with continuous focus on improvement and innovation to meet new industry demands.
Aker Barents and Aker Spitsbergen, two drilling rigs of the Aker H-6e design, by Aker Solutions

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Our track record is the result of close co-operation with leading drilling operators and oil companies with continuous focus on improvement and innovation to meet new industry demands

Aker Solutions has a world-class track-record as a provider of semi-submersible drilling rigs. A total of 39 units of Aker H-3, H-4 and H-6 design have been built. 20 delivered from own yards, the remaining built by other yards on license.

An offshore pioneer
As early as in 1966, our company constructed the pioneer oil drilling rig “Ocean Viking” for offshore operation, as the first drilling rig ever constructed in Norway This platform was immortalised in the second half of 1969, when it made the first economic petroleum discovery on the Norwegian Continental Shelf, during operations for ConocoPhillips, the giant Ekofisk field, which is still in operation.

World’s most popular
In 1971, we signed the first contract for a drilling rig based on our Aker H-3 design, likely the world’s most successful semisubmersible drilling rig design. 37 units of Aker H-3 and H-4 design have since been built for worldwide operations. 18 delivered from Aker Solutions’ own yards, the remaining built by other yards on license.

World’s most advanced
Recently, the success of the Aker H-3/H-4 has been followed up with the Aker H-6e, likely the world’s most advanced semisubmersible drilling rigs. Two units have been built so far, Aker Barents and Aker Spitsbergen. They are specially designed to meet high environmental standards and can operate in ultra deep waters, harsh environments, extreme temperatures and at long distances from supply infrastructure.

Cost-effective, flexible and efficient
The Aker H-7000 design combines the accumulated operational experience of our clients with state of the art design and technology. Aker H-7000 offers a cost effective, flexible and efficient design developed with careful attention to safety, working environment and low emissions. This design is one of Aker Solutions’ responses to the market’s demand for a new generation of highly efficient drilling and completion units.

A wide portfolio
A wider portfolio of drilling semi submersibles are also being developed, with the Heavy Intervention Vessel, named Aker H-3000, as one of the next representing a new generation of semi submersibles. Our strategy for the design of new drilling rigs includes a focus on efficiency, safety, operability and new industry demands. Our final designs will always be performed in close co-operation with the customers and yards.

Modifications and upgrades
Aker Solutions also provides modifications and upgrades to drilling rig operators and owners. This includes services to achieve optimal payload, deck area and operational abilities. We aim for designs in close co-operation with customers and in accordance with authorities and classification societies rules and regulations. Main success factors are a clear definition of the units “as is” condition and establishment of a project execution strategy based on solid experience from all project phases.

Drilling equipment solutions
Aker Solutions is the preferred partner for delivery of innovative, complete drilling equipment solutions and has an established organisation for providing lifecycle operations, services and maintenance. During the last years we have delivered several deep water drilling rig packages and have expanded the product portfolio in that respect.

Our equipment is installed on more than 600 rigs operating worldwide. We work closely with our customers to understand their needs and provide them with drilling solutions of the future.

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