Styrke said a strike by its members would initially affect Transocean’s rig Encourage and Odfjell Drilling’s Deepsea Bollsta, which are drilling wells for Equinor and OMV in the Norwegian Sea, respectively.
It was not immediately clear which drilling rigs would be affected by SAFE and DSO members going on strike.
Equinor and OMV did not immediately respond to requests for comment.