Fig. 1 - The TH5000ML underwater mountable azimuth thruster shown inside Thrustmaster’s Houston, TX based factory. Thrustmaster’s Underwater Mount Azimuth Thrusters Efficient Thruster Design Optimized for Drillships and Semi-submersibles for Ease of Installation. Thrustmaster’s underwater mount azimuth thrusters provide 360° pinpoint precision thrust and seamless integration with offshore drilling and dynamic positioning applications. The steerable propulsion system’s ability to be replaced without interrupting drilling operations is a key benefit, along with unmatched performance, operational efficiency and field tested reliability. Thrustmaster’s large engineering staff developed a series of azimuth thrusters up to 10,750HP (8MW) that are optimized for underwater installation in drillships, semi-submersible drilling rigs and construction vessels. Thrustmaster’s headquarters in Houston Texas consist of the largest thruster manufacturing facility in the world, with complete fabrication, machining, assembly and testing carried out under one roof. Thrustmaster gives the highest attention to quality, safety, environmental and operational efficiency. Features: 1. Reduced Maintenance Downtime 2. Pinpoint Station Keeping 3. Exceptional Reliability 4. Economical Operation 5. Optimum Efficiency Fig. 2 - The TH5000ML with a 7° titled propeller shaft and nozzle.

Fig. 2 - Traditional thrusters propels a wake adhering to the hull bottom, creating flow deflection known as the Coanda Effect. Fig. 3 - For semi-submersible & drilling rigs, Thrustmaster thrusters with a 7° down angle are significantly more efficient than any other thrusters. The Coanda effect is the phenomenon in which a jet flow attaches itself to a nearby surface and remains attached even when the surface curves away from the initial jet direction. The phenomenon derives its name from a Romanian born aeronautical engineer – Henri Coanda. In free surroundings, a jet of fluid entrains and mixes...

Thrustmaster’s 7° tilted thrusters propel a downward wake to eliminate hull friction drag and enable increased transit speed to an additional 1.6 knots, as recently demonstrated during sea trials on the Gusto MSC P10,000 design drillships in Ulsan, Korea. The underwater mount azimuthing thruster can be removed and exchanged without taking the vessel out of service, or having to go into drydock. There are three main components of the underwater installation system: 1. The receptacle with the outer cap (top), 2. The inner cap (middle), 3. The thruster (bottom). The inner and outer caps are installed...

OOS GRETHA The DPS3 semi-submersible construction vessel “OOS Gretha” was launched on November 25, 2013 with six (6) Thrustmaster 5,095 HP (3,800 kW) underwater mountable azimuth thrusters model TH5000ML classed by ABS. The semi-submersible was built at the YANTAI CIMC Raffles shipyard for operation by OOS –International B.V under contract with the Brazilian major oil company Petrobras. CIMC Raffles said it is the first asymmetric semisubmersible unit without bracing in the world. This reduces the towing resistance and dynamic positioning load, improving self propelled transit speed from an average...

To replace a thruster at sea, the thruster is disconnected from the receptacle (Fig. 8.1). A dome seals the bottom opening during thruster removal. Strand jacks are installed on top of the canister or a higher deck and their strands are attached to the thruster (Fig. 8.2). The thruster is then lowered down (Fig. 8.3) where divers secure cables to the thruster (Fig. 8.4) from a crane for loading it on a supply vessel or barge (Fig. 8.5). A replacement thruster is installed using the same method. Thrustmaster’s underwater mountable thrusters are provided with propeller shaft seals designed for...

Thrustmaster of Texas, Inc. 6900 Thrustmaster Drive Houston, TX 77041 USA Telefone: +1 713 937 6295 [email protected] www.thrustmaster.net Thrustmaster do Brasil Ltda. Av. Nilo Peçanha, 50 – Sala 2911 20020-906 Centro Rio de Janeiro, RJ Brasil Telefone: +55 21 3045 9730 [email protected] Broeikweg 31a 2871 RM Schoonhoven The Netherlands Telefone: +31 182 381044 [email protected] Thrustmaster Middle East FZE Building Y - Office No.32 Sharjah Airport Int’l. Free Zone Sharjah, United Arab Emirates Telefone: +971 6 5574104 [email protected] Thrustmaster...