J Ray McDermott, National Petroleum Construction Company (NPCC) and Saipem are taking part in the bidding for EPC1, an offshore facilities package, sources said.
Hyundai Heavy Industries had been shortlisted last year but is no longer in the running, they added.
The tendering process was delayed because of lengthy clarification meetings and technical changes, sources said.
“Zadco is now finally ready to proceed,” said a source.
