Gulfstar

Offshore reliability. Made in America.

Gulfstar FPS, a flexible, reliable solution for deepwater producers, has gone from concept to reality in the deepwater Gulf of Mexico.

Installation of Gulfstar One is complete – 21,500 tons of proof that American engineering and construction are alive and well.

Gulfstar’s standard design approach allows customers to reduce their cycle time from discovery to first oil. From sanctioning a project to completion, Gulfstar can be delivered in 30 months.

Gulfstar is the first system of its kind to be built in the United States, creating 1,000 jobs in 20 states. Fabrication of the hull took place in Aransas Pass, Texas, while the topsides fabrication occurred in Houma, La. At least 90 percent of the materials were sourced in the U.S.

Gulfstar Vision

  • Develop core design with “plug and play” options
  • Enhance safety and reliability with each follow-on unit
  • Provide significant reduction in delivery schedule
  • Reduce risk of engineering & construction cost overruns
  • Provide meaningful producer-operator infrastructure alignment

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Gulfstar at a Glance

  • Classic spar hull with traditional three-level topsides
  • Designed for 3,000 – 8,500 feet water depths
  • Proven and reliable wet-tree technology
  • 60,000 barrels of oil per day
  • Core design of 100 MMcfd; expandable to 200 MMcfd
  • 30 months from start to finish
  • Designed for the new maximum storms
  • First spar-based FPS with major components built in the U.S.
Features Benefits
Williams is a one-stop shop Williams funds the floating production system and the export pipelines, minimizing the number of interfaces with multiple companies
First spar to be built in a graving dock
Simplifies load-out
Single-lift deck During installation, deck is lifted as a single piece, reducing offshore hook up and commissioning time
Hull blocks built vertically
  • Allows easy vertical access to equipment during installation and reduces confined space requirements
  • Minimizes out-of-round problems normally associated with horizontal fabrication
Dead oil storage in hull
  • Dry oil – 10,440 BBL
  • For unplanned well shut-ins, dead oil can be pumped into flow lines, replacing live crude
Large chemical storage
  • Methanol – 1,160 BBLchemicals (10 100-BBL/8 200-BBL)
  • 18 S/S vessels for subsea flow assurance

Topside Features

  • Wells – wet trees only – no rig
  • Configuration – 3-level deck (main, production and cellar)
  • Maximum operating payload – 8,600 short tons (includes payload for options)
  • Production separation – 3 two-phase x 30,000 BLPD
  • Test separation – 1 three-phase x 30,000 BLPD
  • Power generation – three T-60s (all with waste heat and dual fuel)
  • Cranes (main 35 short tons & 130 ft. radius, aux.) 5 short tons and 40 ft. radius
  • Living quarters – 50 persons
  • Helideck – S-92 Helicopter
  • Lift – single piece, 6,600 short tons (excluding crane and vent boom)
  • Design life – 25 years

Hull Characteristics

  • Hull form: Classic Spar
  • Water depth range: 3,000 – 8,500 ft.
  • Outside diameter: 85 ft.
  • Freeboard: 60 ft.
  • Draft: 524 ft.
  • Centerwell: wet, circular, 30’ diameter
  • Strakes 11’ (13%), 3 starts
  • Wave deflection fairing projecting 7’-3”
  • Fixed ballast: 9,500 st.
  • Mooring system: chain/polyester, 3×3
  • Export risers: 2 pull-tubes to accommodate up to 14” risers
  • Flowlines: 8 pull-tubes to accommodate up to 8-5/8” 15K risers
  • Umbilical/injection lines: 8 pull-tubes
  • Designed to API-MET – Central Gulf Area hurricane environments
  • CVA – American Bureau of Shipping (ABS)

Contact Information

Stafford Menard
Manager, Gulfstar Development
(713) 215-2132
stafford.menard@williams.com

Mike Keller
Business Development – Gulfstar
(713) 215-3123
michael.keller@williams.com

Tim Brennan
Business Development – Gulfstar
(713) 215-3029
tim.brennan@williams.com