The tender is part of the Brazilian state-controlled oil giant's subsea contracting spree, which is expected to account for a significant portion of its capital expenditure plan that calls for investments of $174.4 billion over the next four years.

Cameron bid close to $480 million to supply the first 138 subsea tree systems, with the offer 11% cheaper than second-placed FMC Technologies, according to well-placed sources.

GE