PETROBRAS-31

PETROBRAS-31 (IMO: 7351800) is a baycraft vessel sailing under the Panama flag. It has an overall length of 1158 feets and a beam of 187 feets.

Vessel Identification

• MMSI: 351279000
• IMO: 7351800
• Call Sign: HP-9034
• Vessel Type: Offshore Supply / Drillship
• Flag: Panama

Specifications

• Vessel Class: Semi-submersible Drilling Unit
• Gross Tonnage: 27,915 GT
• Year Built: 1977
• Length Overall: 99.97 m
• Beam: 69.49 m
• Draft: 7.62 m

Propulsion

• Propulsion Type: Diesel-Electric
• Thrusters: Dynamic Positioning System with multiple azimuth thrusters
• DP Class: DP-2

Shipyard

• Builder: Verolme Shipyard
• Country of Build: Netherlands
• Year Delivered: 1977

Owner / Operator

• Owner: Petrobras (Petróleo Brasileiro S.A.)
• Operator: Petrobras
• Country: Brazil

Navigation / Communications Equipment

• AIS Class: Class A Transponder
• Navigation Status: Engaged in offshore operations

Operating Region

• Primary Region: South Atlantic Ocean
• Primary Area: Brazilian Continental Shelf (Campos Basin and Santos Basin offshore Brazil)
• Secondary Region: Caribbean Sea operations have been recorded

Vessel Description

PETROBRAS-31 is a semi-submersible drilling unit operating under the Panamanian flag, owned and operated by Petróleo Brasileiro S.A. (Petrobras), the Brazilian state-controlled petroleum company. Built in 1977 at Verolme Shipyard in the Netherlands, the unit has been a long-serving asset in Petrobras's offshore drilling fleet. The vessel operates primarily on the Brazilian continental shelf, supporting deepwater and ultra-deepwater exploration and production activities in the Campos and Santos Basins, which are among Brazil's most prolific offshore hydrocarbon regions. As a semi-submersible platform, the unit achieves operational stability through its submerged pontoon hull configuration, reducing surface wave effects during drilling operations. The dynamic positioning system allows the vessel to maintain precise station-keeping without conventional mooring in deeper water applications.