Ensco noted in its latest fleet status report, published on Monday, that the arbitration proceedings have been "initiated" in connection with a contract for drillship DS-5 that Petrobras had voided after revelations brought to light in the sprawling Car Wash scandal engulfing the state-run operator.

In a 10-K report filed in February this year, Ensco acknowledged Petrobras' allegations that an Ensco subsidiary "had knowledge of and assisted a former third-party marketing consultant that procured and received improper payments from Samsung Heavy Industries, the shipbuilder of Ensco DS-5, that were then paid to employees of Petrobras".

Those