OSLO, April 22 (Reuters) - Norwegian rig firm Fred. Olsen Energy said on Tuesday that one of its rigs, the Blackford Dolphin, will need "additional structural upgrades" and the cost of the work, which will be completed in June, will be $195 million.
Separately, the firm said another of its rigs, the Borgny Dolphin, will suspend its operations off Brazil, where it was under contract from oil firm Petrobras.
The contract will cease from May. Fred. Olsen Energy did not say why the contract was stopped. (Reporting by Gwladys Fouche)