The Oslo-listed group controlled by Norwegian-born billionaire John Fredriksen returned to court along with several subsidiaries after failing to win consent from bank lenders to postpone payments on $5.7 billion of debts.

Its total debts and liabilities stood at $7.3 billion at the end of the third quarter of 2020.

"This announcement marks the start of the court supervised process that will create a company that is financially sustainable for the long term," Chief Executive Stuart Jackson said in a statement.

"We are working closely with our stakeholders to ensure we achieve an outcome that gives us the flexibility to weather the low points in our industry cycles, whilst positioning us well for market recovery," he said.

The company is the latest in a series of offshore rig firms to seek court protection from creditors following spending cuts by the oil industry in wake of the COVID-19 pandemic.

By Nerijus Adomaitis and Terje Solsvik