It all started with an idea in 2014. AF Gruppen wanted to see if it was possible to reduce the number of cylinders of oxygen by dismantling modules on platforms out in the North Sea. Purchasing manager in AF Offshore Decom, Jan-Frode Pedersen, says it has been a long process.
- It has been a long canvas to bleach. Such operations require large amounts of oxygen, and it is demanding to get enough out to the platforms. We had to convince the customer that it is a good idea to use liquid oxygen on the platform instead of traditional offshore gas racks. With good documentation and risk assessments, we received, with the support of Linde, acceptance of this concept. The customer was of course concerned about safety, since there is a lot of work with open flames on a platform that can be risky.
When the customer, after extensive risk assessments and a detailed review of the proposed solution, agreed to the project, the idea was to use liquid oxygen (LOX) rather than compressed. Together with Linde, AF Offshore Decom has developed a solution that can handle such large assignments.
Linde went from delivering several cylinders and packages of compressed gas, to the delivery of tanks with liquid oxygen (LOX) of approx. 7,500 liters pr. tank. This reduced the need for transport from six to one truck on the specific delivery. At the same time, this solution was less space-consuming on ships and on board the rig - and not least, this reduced the need to change packages accordingly. Such a solution has several challenges, both when it comes to infrastructure, logistics and delivery capacity.
- We knew what we needed, but such a solution for use offshore was never delivered and used before. All the pieces were not completely in place, Pedersen says.