Maersk Drilling is expected to make up to 140 job cuts from its operations in Norway.
The move was announced by the trade union MAF on its website earlier today.
It comes after discussions in recent weeks with Maersk Drilling.
In a statement, MAF said it looked like between 130 and 140 jobs would be lost from the company.
Chief executive Jacob Korsgaard in Maersk Drilling has also confirmed the decision.
He said the decision was a “direct consequence” of a decline in activity on the Norwegian shelf.
Two units have been moved out of use, the Maersk Reacher and the Maersk Gallant.
Korsgaard said the job losses were “unavoidable” in the current marketplace.