Rigging for Arctic

Castor Drilling Solution (CDS) has developed a drilling concept that needs less space and heating. - It should fit the Statoil Cat-I rig well, says CDS CEO Øyvind Vaagland Reiten.

Kristiansand-based CDS has developed and patented a new raiser concept for drilling rigs that could well suit the planned Statoil Cat-I, which is intended to operate in up to two meter thick ice.
- Our concept significantly reduce the need for heating, exposed wind area and risk for icing, and will suit arctic conditions where traditional rig towers must be covered in order to operate. Most of the heavy equipment is moved from the drill tower and lowered into the hull of the vessel, says Reiten.

A lift
Since 2005, more than 100 ultra deep drilling vessels (UDW) dedicated depths of more than 2 500 meters have been delivered world-wide, according to IHS Cera. Most of these are built on the Saipem 10.000-design from year 2000, also known as fifth generation drilling rigs.

- Little has happened to the fundamentals regarding design onboard drilling vessels, says Reiten. 

Even though the CDS design is based on traditional equipment from National Oilwell, Aker Solutions and Cameron, their engineers have made significant changes in the design dedicated lifting and compensation systems for wave movement.

- We also remove many of the traditional operations away from the drilling tower, a usually condensed space containing lots of equipment and providing limited room for operations. Our tower solution provides access to all equipment and the drill-center using the rig cranes. This bodes for easier equipment handling and maintenance onboard the vessel.

- With only a few changes in the design we are able to class the rigs drilling package only operating the use of its cranes, he says.

Performed by Havnevik