Spar Platforms

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SPAR PLATFORMS Group 1
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Transcript of Spar Platforms

Page 1: Spar Platforms

SPAR PLATFORMSGroup 1

Page 2: Spar Platforms

SPAR Applications

• Presently there are 17 SPARs in operation

▫ 3 Classic SPARs

▫ 13 Truss SPARs

▫ ONLY 1 Cell SPAR

• All except the Kikeh Truss SPAR , located off the Malaysian coast, can be found in the Gulf of Mexico

• SPAR platforms are used in ultra-deep waters

Page 3: Spar Platforms

SPAR ApplicationsSPAR Platforms are commonly used in

deep water applications for:▫ Drilling Mad Dog SPAR

▫ Storage Brent SPAR

▫ Production• Neptune SPAR

▫ Unmanned • Buoys

Page 4: Spar Platforms

SPAR Projects

Company Platform Type Year Installed

Kerr-McGee Neptune Classic 1996

ChevronTexaco Genesis Classic 1998

ExxonMobil Hoover Diana Classic 2000

Kerr-McGee Nansen Truss 2001

Murphy Medusa Truss 2002

Kerr-McGee Boomvang Truss 2002

bp Horn Mountain Truss 2002

bp Holstein Truss 2003

Kerr-McGee Gunnison Truss 2004

bp Mad Dog Truss 2005

Page 5: Spar Platforms

SPAR Projects

Page 6: Spar Platforms

SPAR Design Considerations• All SPAR platforms utilize strakes to reduce vortex induced motions• Anodes are commonly found on SPAR hulls to reduce corrosion

• Different topside decks can be attached to SPARs depending on the job. Some of these decks are:▫ A full drilling rig (3,000hp)▫ A workover rig (600-1,000hp)▫ Production equipment

• The world’s first production SPAR was used in 1996

• Previously, SPARs had been used as oilstorage vessels (Brent project)

Page 7: Spar Platforms

SPAR Design Considerations• There are 3 basic designs

for SPAR Platforms

1. Classic SPAR2. Truss SPAR3. Cell SPAR

• The different SPAR designs reflect industry innovations

1. Each design is an improvement on an older model and offers improved functionality at a reduced cost

Page 8: Spar Platforms

Clas

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• The world’s first production Classic SPAR, Neptune, was installed in the Gulf of Mexico in 1996

• Oryx Energy developed Neptune, and was later acquired by Kerr-McGee in 1999.

• The Classic SPAR hull is basically a cylinder

• This cylinder is separated into three main sections:

1. Upper section • Compartmentalized and filled

with air to provide the buoyancy

2. Centerwell• Flooded with seawater

3. Keel section (“Soft Tank”)• Compartmentalized to aid in

transportation . Also contains any field-installed ballast.

Page 9: Spar Platforms

Genesis SPAR•Genesis was the second Classic SPAR ever built

•Classic SPARs have 4 major components: a hull, a mooring system, risers, and topside decks.

• SPAR designs are inherently stable due to their deep draft hulls.

•Dry Tree technology can be utilized on a SPAR platform.

•SPAR platforms tend to be 30% cheaper than other options in deep water.

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Trus

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• Truss Platforms were introduced by Kerr-McGee in 2001 when the Nansen was installed in the Gulf of Mexico

• The Truss SPAR design has 3 main components:

1. Hard Tank• Provides most of the in-place buoyancy for

the SPAR.

1. Truss Section• Supports the heave plates and provides

separation between the keel tank and hard tank.

1. Keel Tank (“Soft Tank”)• Contains the fixed ballast and acts as a

natural hang-off location for export pipelines and flowlines .

Page 11: Spar Platforms

Perdido SPAR•Shell’s most recent Truss SPAR broke the deepwater record and will be operational in 2010.

•Truss SPARs are characterized by the tubularmembers that provide a connection betweenthe hard tank and the keel.

•The truss system also support to the heaveplates which reduce improve stabilityby reducing heave.

Page 12: Spar Platforms

Cell

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• The Cell SPAR was also designed by Kerr-McGee in the Red Hawk project

• Red Hawk was installed in the Gulf of Mexico and made operational in 2004

• Cell SPARs have several design features including:

• The Hard Tank is made up of 6 cylindrical tubes that surround a seventh central tube.

• Each of these tubes is 20 ft in diameter and contain variable-ballast tanks and redundant, independent cells

• The middle hull section is an extension of three of the seven cylindrical tubes, and serves as a rigid connection between the hard tank and the keel tank.

• The lower section, or keel, contains the permanent ballast

Page 13: Spar Platforms

Red Hawk SPAR•First and only Cell SPAR

•The separate tubesare connected by heave plates

•Heave plates give the structure addedstability by reducing the force transferred from ocean waves and current.

Page 14: Spar Platforms

SPAR Economics

Truss SPARs▫ The hull of a truss SPAR is smaller, reducing

both material cost and the cost of transportation. Also for some truss SPARs, the actual truss system can be made in the US and then mated with the hard tank when it arrives.

Cell SPARs▫ Because of the reduced size of the cylinders,

fabrication of cell SPARs can take place in the US, meaning that there is no transportation cost.

Classic SPARs▫ The US does not have a facility large enough to construct SPAR hulls.

Therefore, almost all SPAR hulls have been manufactured overseas , typically in Finland, and then transported to the US, which increases the cost of the project.

Page 15: Spar Platforms

SPAR Economics• SPAR designs are the most economical for ultra-

deep water.

• By utilizing a mooring system instead of permanent legs, SPAR platforms reduce materials cost and can be moved to different wells.

• Oryx spent $300 million on Neptune, the world’s firstproduction SPAR platform.

• Neptune was estimated to save Oryx and it’s 50/50 partner $90 million.

Page 16: Spar Platforms

SPAR Construction

•The Hard Tank of a Truss SPAR is constructed in halves

•Later the two completed halves are brought together

•Then the two halves are joined to form the top of the Truss SPAR’s Hard Tank

Page 17: Spar Platforms

SPAR Construction• The SPAR hull is shipped in sections that will later be mated together.

•The hull is joined and towed out to the well location.

•The SPAR hull is then flooded with seawater and up-ended. Once in place, the hull is connected to the already installed mooring system.

•The topsides are then attached to the SPAR hull.

Page 18: Spar Platforms

SPAR construction timeline:

Perdido•http://www.shell.us/home/content/usa/aboutshell/strategy/major_projects/perdido/tracking/tracking_project_ncb07.html

Page 19: Spar Platforms

References•“Industry Projects.” Offshore Technology. 2009. 21 Apr. 2009 <http://www.offshore-technology.com/projects/>.

• “Offshore: ABS to Class Cell Spar for Kerr-McGee.” Marine Link. 2 Apr. 2003. 19 Apr. 2009

<http://www.marinelink.com/Story/Offshore:+ABS+to+Class+Cell+Spar+for+Kerr-McGee-11137.html>.

•"Perdido Development Project." Shell. 5 Sept. 2008. Shell oil. 20 Apr. 2009 <http://www.shell.us/home/content/usa/aboutshell/strategy/major_projects/perdido/tracking/tracking_project_ncb07.html>.

•“SparTEC.” FloaTEC. 2009. 20 Apr. 2009 <http://www.floatec.com/spar.htm>.

•Ultramarine, Inc. Welcome to Ultramarine. 1996. 24 Apr. 2009 <http://www.ultramarine.com>.