Multipurpose drill ship provided with active heave compensated (AHC) drilling platform from MacArtney
Site investigations down to 60 m water depths have called for installing a turnkey MacArtney solution that would enable the execution of advanced geotechnical drilling techniques.
The newly launched multipurpose drill ship FREJA integrates a high-performance active heave-compensated drilling platform manufactured by MacArtney. The vessel's drilling setup has been designed to provide enhanced drilling conditions even in rough seas.
Keeping drilling rig quiet in three-metre high waves
A customised, motion-compensated working platform of ten times seven metres is situated amidships. This means that the working deck remains stationary while the vessel follows the movements of the waves. Besides, the platform design includes a roll function compensating for the vessel rolls by +/- 7 degrees. The active heave compensation is achieved by four fast-reacting, high-performance winches mounted on the corner pillars supporting the entire platform.
An integrated control system controls the winches, ensuring the complete platform is synchronised with the vessel's dynamic positioning control system. This enables drilling methods that ensure higher sample quality than that usually achieved by carrying out traditional drill ship procedures. Thus, the operation remains less dependent on weather conditions.
Contents of the order
In addition to project management, mechanical design and engineering, as well as installation and commissioning, the scope of supply of this MacArtney turnkey solution includes the 100 t AHC drilling platform, four winches, the integrated control system and a spare package comprising, among others, three spare winches. The primary purpose of this system is within offshore wind projects.
We are extremely happy to be part of this project and in a position to supply such a leading-edge system solution, which enhances our customers' drilling methods to benefit all, states MacArtney Manufacturing.
Trusted solutions
MacArtney winch systems are some of the most advanced solutions available and have been trusted by customers worldwide for decades. Our constant focus on improving existing designs and developing new solutions ensures high-quality, dependable winch systems for all needs. We design and supply complete solutions for handling ROVs, towed systems, corers, ploughs, diving systems, and a wide range of other applications for offshore and underwater use.
Our packages include integrated dynamic cable systems, slip rings, winches, sheaves, launch and recovery systems, and active heave compensation systems. All MacArtney systems are designed, engineered, tested and certified to customer standards.
