One of the largest offshore unions will ballot workers to decide whether to move forward with strike action.
RMT, which represents about 5,000 workers, has endorsed the call from its members for industrial action in protest over a range of issues including a change in shift patterns and leave entitlement.
The union also claims staff numbers will be slashed and workers’ benefits are under attack.
Mick Cash, the union’s general secretary said: “The attack on jobs and working conditions in Britain’s offshore industry is as sharp now as it was at the bottom of the oil price slump and RMT believes that Oil & Gas UK companies are exploiting the situation to launch an unprecedented assault on the workforce.
“The preparations for sequential ballots are in hand and RMT will work with sister unions in the coming months to stave off this attempt to hammer down on the workforce across the offshore industry.”
GMB Scotland has already announced it will conduct a consultative ballot over the coming weeks – where workers will be asked if they want to vote on strike action.