EMAS AMC’s flagship vessel, the Lewek Constellation, is close to completion at Huisman’s yard in Schiedam, Netherlands.
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Image from EMAS. |
The latest addition to EMAS AMC’s fleet has been designed for rigid and flexible pipelay and construction work in water depths exceeding 3000m. The vessel is an ice classed, DP3, multi-lay vessel with heavy lift capabilities.
The vessel, built with a 3000-tonne heavy lift mast crane at Singapore headquartered Triyard’s Vietnamese yard, Saigon Offshore Fabrication & Engineering (SOFEL), completed its first job, ahead of arriving at Schiedam, for VAALCO Gabon (Etame), offshore Gabon.
The work scope for VAALCO included the transportation and installation of two jackets, topsides, flare booms and living quarters for the Etame and Southeast Etame / North Tchibala (SEENT) platforms, along with the installation of a new living quarters and a gas lift package onto the FPSO Nautipa.
Once its multi-lay tower and ancillary equipment for pipe lay activities are installed, the vessel is due to proceed to the US Gulf of Mexico to work on Noble Energy’s Gunflint project in 1Q 2015, installing pipelines, umbilicals and ancillary equipment.
EMAS Marine Base in Ingleside, Texas, will be used to perform the pipe stalking and fabrication of various subsea structures.
Gunflint was discovered in 2008, and is estimated to contain resources between 65-90 MMboe. The field is in Mississippi Canyon Block 948, at a water depth of 2000m.
The 178m-long, 46m-beam Lewek Constellation’s multi-lay system (MLS) comprises an 800-tonne tiltable tower, a 60-tonne pipeline end termination (PLET) handling system for large PLETs, and a 1200-tonne abandon and recovery (A&R)system. The tower has dual 400-tonne tensioners, a straighter for handling pipe-in-pipe flowline systems with outer pipe up to 16in. outer diameter (OD), a 900-tonne hang-off module (HOM), and a movable/adjustable work platform along the tower. The tower can be adjusted from 60° to 90° to accommodate pipe laying from shallow water to ultra-deepwater. The A&R system has two 600-tonne traction winches and a 125-tonne secondary winch.
In rigid reel lay, the vessel can apply up to 800-tonne of dynamic top tension on flowlines and rigid risers up to 16in. nominal outer diameter (OD). In flexible mode, the vessel and lay system can accommodate sizes up to 24in. nominal OD, while applying 400-tonne and 430-tonne of top tension, respectively.
Spooling barge
The pipelay vessel (pictured, photo from EMAS) will use a spooling barge, outfitted with a spooling system that includes a fleeting roller track assembly, a fleeting tensioner, a reel cradle assembly and winches, for reloading reels. Pipe will be spooled on to the reels on the barge at a quayside, then taken offshore for reel transfer. The vessel’s heavy-lift system is used to offload empty reels and load full reels.
The vessel, which accommodates up to 239 personnel, can store up to four rigid pipe reels and up to two flexibles carousels.
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