[Australia] BW Barossa FPSO Submerged Turret Production (STP™) system

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escveritas
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[Australia] BW Barossa FPSO Submerged Turret Production (STP™) system

Unread post by escveritas »

BW Offshore has awarded an Early Order to Proceed (EOP) to APL, part of NOV Completion and Production Solutions segment, for the supply of a large Submerged Turret Production (STP™) system for the Barossa gas and condensate field offshore Australia.

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According to NOV, the Submerged Turret Production (STP™) is a unique, innovative, and flexible turret mooring system for floating production, storage, and offloading (FPSO) vessels, making it suitable for a wide range of applications. As a further development of the Submerged Turret Loading (STL™) system, STP is combined with a high-pressure multipath swivel to create a complete turret and swivel package.

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STP or FPSO vessel mooring is developed from the basis of the proven STL system. The STP swivel mounted on top of the turret buoy transfers oil, water, gas, signals, and power from the geostationary riser system to the piping and cabling system of the freely weathervaning production vessel.

As for STL, the STP system enables schedule decoupling between the offshore and shipyard work. The disconnect feature of the buoy simplifies unplanned repair, upgrading, inspections, and replacement of the FPSO vessel as well as abandonment of the field.

Permanent or disconnect mooring

As for STL, the STP system can be designed for disconnect service or for permanent mooring throughout the field life.

STP integration

The STP compartment in the FPSO vessel is a cylinder extending from the bottom to upper deck, with the receiving cone as the lower part. With a diameter of 10 to 18 m, the impact on the hull is minimal. Only local reinforcements of standard steel work are required. The turret integration into the FPSO vessel is simplified by bearing structures integrated in the STP buoy as opposed to bearings integrated with the FPSO vessel hull.

STP system references

STP systems in service cover a wide range of applications—from the harsh North Sea environment to cyclone-prone areas such as China or Australia, mooring caters for seas as high as 16 m Hs (significant wave height), water depths up to 2600 m, vessel sizes up to very large crude carriers, throughput up to 600,000 BOPD, etc.

STP in ice
Icebergs and ice ridges in Arctic environments are better addressed with the quick disconnect features provided by the STP system. STP systems are verified in ice environments, and model tests have documented survival of a vessel moored in 1.6 m-level ice with a drift speed of 0.75 m/s.
escveritas
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Re: [Barossa FPSO] Submerged Turret Production (STP™) system

Unread post by escveritas »

NOV announces contract award by BW Offshore for STP system in Barossa field

APL, which is part of our Completion & Production Solutions segment, has received a contract award from BW Offshore for the supply of a large submerged turret production (STP) system in the Barossa gas and condensate field located offshore of Australia.

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Located approximately 186 m (300 km) northwest of Darwin in the Timor Sea, the Barossa field features water depths ranging between 720 and 920 ft (220 and 280 m). The Barossa development consists of infield subsea infrastructure tied back to the centrally located floating production storage and offloading (FPSO) vessel. The FPSO processes high-pressure reservoir fluids for gas export to the Darwin liquefied natural gas (LNG) facility via a 180-m (290-km) long subsea pipeline for condensate storage and offloading.

The Barossa FPSO is a new, purpose-built vessel equipped with our STP system, which provides permanent mooring and connection to subsea facilities. The FPSO is designed for a 25-year life of uninterrupted operation without drydocking.

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Our STP system is a unique, innovative, and flexible turret mooring system for FPSOs. The system includes our STP swivel, which is designed for high pressures, temperature, and volumes, and the system transfers all fluids, signals, and power between the subsea system and the freely weathervaning production vessel.

Hans Hoegh-Omdal, Vice President, Turret, Mooring, & Surf Group for BW Offshore (BWO) commented, “BWO has worked with APL on numerous FPSO projects over the years, the latest being our successful Catcher FPSO project. With APL’s first-class turret technology and our successful cooperation in the past, it was easy for BWO to turn to APL for their assistance for the Barossa project.”
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