In an operational update, the company says current deals worth $685m provide good visibility on future earnings.
Of this amount, $367m are firm contracts.
Duncan Anderson, chief executive for GMS, said: “GMS has had a good first quarter and we are continuing to maintain a very healthy backlog, all of which is Opex-based work.
“The flexibility of our vessels, which can be adapted to support diverse operations from well service and maintenance to well abandonment and decommissioning, means we are able to offer our clients competitive solutions that are particularly helpful in the current low oil price environment.”
