Stril Barents platform supply vessel (PSV) is owned and operated by Norwegian shipping company, Simon Møkster Shipping. It is built to provide both supply and stand-by services at the Eni Norge-owned Goliat offshore oil and gas field in the Barents Sea for ten years beginning from February 2015.
The PSV was constructed at the Vard Aukra shipyard in Norway, while its hull was developed at the Vard Braila shipyard, Romania. The vessel is designed to operate in Arctic environments. Its extensive emergency response capabilities include search-and-rescue, fire-fighting, oil recovery, and emergency towing.
ENI Norge awarded a ten-year service contract, with extension options, to Simon Møkster Shipping for the operation of Stril Barents at the Goliat location in April 2013. In the same month, Simon Møkster Shipping signed a letter of intent with Vard Design to design and construct the PSV. The ship’s naming ceremony was held at Skagenkaien in Stavanger, Norway, in February 2015.
Blue Ship Invest has ordered a series of six medium-sized platform supply vessels based on Ulstein’s PX121 design. The first three vessels have been delivered while the other three vessels are set to be delivered in 2013.
Stril Barents would replace the current stand-by vessel Esvagt Aurora operating at the Goliat field, which will enter into production in mid-2015. It will also assist in the cleanup of oil spills and in search-and-rescue operations at the Goliat location.
Stril Barents PSV design, features and capacities
The Stril Barents platform supply vessel is based on the VARD 1 06 LNG design, and features a low-resistance steel hull. It accommodates up to 27 persons in single and double cabins. Its bridge operations are controlled by a Kongsberg Dynpos (ynamic position) system, two K-Master control workstations, and two NDU and ISJ cC-1 cabinets.
The vessel’s overall length is 94.3m, breadth is 20m, and depth to main deck is 8.3m. It has a maximum draught of 6.74m and a cargo deck area of 750m². Its gross tonnage and deadweight are 5,938t and 4,264t respectively.
A hangar is built at the stern of the vessel to hold an emergency towing winch; NOFO 2009 oil recovery equipment. A slipway is also provided to facilitate launch and recovery of the rescue crafts.
The PSV can carry 3,082m³ of ballast, 2,785m³ of drill water, 2,039m³ of ORO, 1,337m³ of fuel oil, 922m³ liquid mud, 922m³ of brine, 878m³ of fresh water, 400m³ of dry bulk, 200m³ of LNG fuel, 297m³ of base oil, 157m³ of methanol, 157m³ of special product, and 107m³ of dispersant.
Cargo pumps installed in the vessel include two 250m³/h fuel oil pumps, two 250m³/h fresh water pumps, two 250m³/h ballast / drill water pumps, two 75m³/h to 100m³/h methanol pumps, two 75m³/h to 100m³/h special product pumps, two 100m³/h brine pumps, two 100m³/h mud pumps, two 100m³/h base oil pumps, and one 100m³/h ORO pump.
Deck equipment and life rafts aboard Stril Barents PSV
The platform supply vessel has a deck area of approximately 950m². It houses two 13t and two 12t anchor and mooring winches, two 5t tugger winches, one 125t towing winch, one 5t slipway winch, two messenger winches, one 10t nofo winch, one 5t nofo capstan, one 25t wire stopper, two 13m deck cranes of 1t each, and one 15.5m deck crane of 3.8t.
Lifesaving equipment aboard the vessel includes six off-life rafts, which can carry 16 persons each; two off fast rescue craft, and one off daughter craft.
Propulsion and performance of Stril Barents
The Stril Barents supply and stand-by vessel can be operated with both marine gas oil, and liquefied natural gas (LNG). Its main propulsion unit consists of two 3,800kW electrically-driven shaft lines. It consumes less fuel and emits less greenhouse gases.
The vessel’s main generator consists of two generator sets, each with a generating capacity of 1,056kW at 1,200rpm, and two 3,915kW / 720rpm generator sets. The auxiliary generator set consists of one 260kW / 1,800rpm generator set.
The PSV incorporates two 860kW tunnel thrusters, two 1,170kW tunnel thrusters, and one 880kW retractable azimuth thruster.
The propulsion system provides a speed of 16kts. The vessel’s environment-friendly design allows it to operate under extreme conditions, while maintaining good sea-keeping performance.