John Fredriksen's Seadrill has revealed it made a pre-tax profit in the first six months of 2018 - before it emerged from chapter 11 restructuring.
The company said adjusted EBITDA to 30 June was $192m from revenue of $712m.
It recognised an impairment of $414m on three of its oldest drilling units.
On 2 July, Seadrill emerged from chapter 11 after successfully completing a reorganisation plan that involved $2.4bn