PetroRio bought the FPSO OSX-3 and 80% of the Tubarao Martelo Field on the BM-C-39 and BM-C-40 blocks of the Campos Basin. The FPSO was in operation for Dommo Energia, formerly OGX and cost PetroRio US$ 140 million. PetroRio plans to integrate the Tubarao Martelo Field with the Polvo Field where it is already the operator with all producing oil wells in both fields connected to the acquired FPSO. PetroRio will initially assume 100% of the operating costs of Tubarao Martelo with rights to sell 80% of production. After the interconnection of the wells scheduled for mid-2021, PetroRio will have a 95% stake in the fields while current operator Dommo will have 5%. Recently, Dommo indicated it might postpone payments for the OSX-3 due to the Tubarao Martelo revitalization plan, which required a large investment. Tubarao Martelo currently produces about 5,800 bo/d but PetroRio thinks this could be boosted to 10,000 bo/d after the completion of the revitalization plan. The company also believes that the combined fields could reach an estimated 20,000 bo/d production by 2021. PetroRio is currently awaiting approvals on the deal from the authorities. Polvo and Tubarao Martelo are 9 km from each other with the planned integration program costing between US$ 50 million and US$ 60 million. Currently, the combined operating costs for both fields is about US$ 200 million per year but combining the two fields is expected to drop this figure to about US$ 130 million a year after it is completed. This amount also considers the return of the FPSO currently leased at Polvo. PetroRio is the operator of the Polvo 100%. In 2013, Petronas entered into an agreement with OGX, now Dommo for a 40% stake in the Tubarao Martelo Field for US$ 680 million but then withdrew from the deal six months later. In October 2013, Dommo was in the process of judicial recovery from bankruptcy and the process was finalized in August 2017. Tubarao Martelo was once considered OGX's most promising field. Petronas set as a condition for the deal that OGX restructure its debt. OGX was counting on the money from Petronas to start-up the Tubarao Martelo Field and to stay intact. The Tubarao Martelo Field was seen by experts as the last chance for OGX to generate cash flow and have a chance to emerge from bankruptcy. 
PetroRio bought the FPSO OSX-3 and 80% of the Tubarao Martelo Field on the BM-C-39 and BM-C-40 blocks of the Campos Basin. The 