Offshore services firm Bilfinger Salamis said it completely rejects claims that union representatives were removed from the North Sea Culzean project.
Unite union revealed on Thursday it is seeking urgent talks with French oil giant Total and Bilfinger Salamis over claims certain staff were not required back (NRB) and put on notice.
The union said operator Total had requested Bilfinger reps were downmanned from the project the day before they were due to be sent out on a three-week rotation.
Unite said it appears they have been “singled out and removed from the project”.
Bilfinger Salamis said it rejected the claims and no workers had been singled out by the firm.
A spokeswoman for Bilfinger Salamis said: “We have invited Unite to meet with us, as we do when specific allegations are made.
“We completely reject the claim that we have singled out their representatives for removal.”
The Culzean field is located almost 145 miles east of Aberdeen.
The new allegations follow a number of worker disputes on the gas project.
In August, the union made calls for an investigation into claims workers were threatened with being blacklisted.
Earlier this week, contractors for Bilgfiner, Wood and Semco Marine indicated they were willing to take industrial action over a bonus pay dispute.
Unite regional industrial officer, Tommy Campbell, said: “We are extremely suspicious about the motives behind the decision to effectively remove our elected representatives from the Culzean project and put them on a week’s notice.
“The representatives supported Bilfinger workers to speak up about alleged threats of NRB and bullying.
“As a result of their willingness to stand up for hundreds of workers to demand fair treatment at work and to support a reasonable bonus claim, it appears they are being singled out and removed from the project.
“Unite is now deeply concerned that our representatives are being openly targeted on the Culzean offshore project and we are seeking urgent talks to clarify the position.
A Bilfinger spokeswoman added: “To suggest they have been removed deliberately is misleading and in bad faith while we try to maintain a dialogue with Unite.”