Norway's DOF Group is asking banks and bondholders to extend a debt standstill agreement in a bid to complete a $2bn financial restructuring.
The offshore vessel owner has called a meeting on 30 September for holders of three bonds sold by subsidiary DOF Subsea.
A waiver is in place on payment obligations until that date, but the shipowner now wants this stretched until 31 January next year.
The same request has been made to lenders.
"Discussions and negotiations on the restructuring of the group are still ongoing," the company said.
"While progress has been made, an agreement for the restructuring of the group will not be reached before the current deferral and standstill arrangements with the bondholders expire."
DOF however has never signed up all its banks to the standstill deal, which was sealed in May.
Bank breaks ranks
The shipowner has previously said lenders representing 91% of its debt agreed to the temporary freeze, and 88% of those holding debt in DOF Subsea.
In July, it said one of its rebel lenders had demanded repayment of a $47m loan.
DOF, hit by a severe downturn in the offshore vessel sector, said at the time that under the terms of the standstill agreement, the group was not allowed to make any payment to the lender, but it pledged to keep talking.
None of the other banks who have not entered into the suspension agreements have taken any similar steps under their loans, the company added.
DOF banked an emergency loan of NOK 100m ($10.4m) in March to cover short-term liquidity needs.
This was also due to expire on 30 September.
Anchor-handlers lost
Last month, DOF had to hand its 50% share of anchor-handling tug supply (AHTS) joint venture DOF Deepwater to its partner, Akastor, as part of a debt deal.
DOF Deepwater has a fleet of five ships.
Oil services company Akastor is controlled by Norwegian investor Kjell Inge Rokke, a shareholder in rival Solstad Offshore.
Solstad and another Norwegian offshore vessel owner, Havila Shipping, have clinched refinancing deals this year.
