Skip to main content

Heidrun, Dvalin Project uses IK’s Valkyrie System™ for Tie-in Operations


IK-Valkyrie System™




Norwegian Continental Shelf

Project Manager:

Peter Bjørnsen

An Oil Supermajor was awarded the assignment to prepare the Heidrun platform to receive the production from the Dvalin field (Zidane).  The contract was awarded in September 2016 and includes engineering, procurement, construction, and installation work.

For several Tie-in’s, the Oil Supermajor required IK’s Valkyrie System™, a specialized welding purge barrier system, which has been designed for removal through a 1” NS (28mm id) Threadolet after welding.

Due to the use of long flangeless lengths of piping and multiple bends, traditional back-gas equipment would be challenging to remove after welding and would in most cases require water flushing for removal. With the use of IK’s Valkyrie System™ one can avoid the traditional tasks of flushing and drying of the pipelines after the welding operations, thus significantly reducing the commissioning time and cost.

IK’s Valkyrie System™ comprises three different back-gas products to cover all pipe sizes. This solution allows for extremely efficient welding operations due to sophisticated purge methods. All three products can be removed through a 1-inch Threadolet.

IK’s Valkyrie System™ products use an advanced gas purge monitoring & flow control unit. All operations are carefully planned, and all products are custom built in-house at IK-Norway.  Services are performed by experienced and certified personnel, following specific operational procedures and guidelines.

This was our 168th successful Back-gas isolation installation performed with IK’s Valkyrie System™ since the initial operations were performed on the Johan Sverdrup “Bridges” Hook-up in 2018. 

Peter Bjørnsen

Send a question or enquiry about this project

Please tick the box to prove you're a human and help us stop spam.
Back to all Projects