Mooring Analysis of a Truss Spar

Kristoffersen, Guro; Weaver, Tim

doi:10.4043/13271-ms

Cited by 3 publications

(3 citation statements)

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“…On the other hand, the lack of water entrapment (horizontally) in the Truss Spar midsection results in slightly greater surge/sway wave frequency response than for the Classic Spar (Kristoffersen and Weaver, 2001). The Truss Spar, however, resists heave motion through a combination of a long natural period and a much larger amount of hydrodynamic damping compared to the Classic Spar.…”

Section: Comparison Of the Truss Spar And The Classic Sparmentioning

confidence: 93%

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Design of the Truss Spars for the Nansen/Boomvang Field Development

Bangs¹,

Miettinen²,

Silvola³

et al. 2002

All Days

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The Truss Spar is a new floating platform concept that is rapidly becoming one of the preferred systems for developing deepwater Gulf of Mexico fields. The Truss Spar provides a stable, cost-effective platform for dry-tree completions over a wide range of water depths. The Truss Spar is an extension of technology developed on previous "Classic" Spar projects, but has several specific advantages. These advantages were exploited to provide a fit-for-purpose platform solution for the Nansen/Boomvang Field Development. This paper describes the design of the Truss Spars for the Nansen/Boomvang Field Development. The paper reviews the Truss Spar concept, past development work, and comparison with the Classic Spar concept. The paper describes the specific Nansen/Boomvang project requirements and design criteria and how they influenced the platform configuration. The paper includes summaries of analysis results for global motions, mooring design, and hull structural design. The paper also includes a description of unique design features, including heave plates, SCR pulltubes, hard tank-to-truss connections, and toptensioned riser guides. These novel features, and other technology proven on the Nansen/Boomvang project, are readily transferable to other Truss Spars now under design.

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Section: Comparison Of the Truss Spar And The Classic Sparmentioning

confidence: 93%

“…The analysis of the Boomvang mooring system is described in detail in an earlier paper (Kristoffersen and Weaver, 2001). The analysis of the Boomvang mooring system is described in detail in an earlier paper (Kristoffersen and Weaver, 2001).…”

Section: Global Analysismentioning

confidence: 99%

Design of the Truss Spars for the Nansen/Boomvang Field Development

Bangs¹,

Miettinen²,

Silvola³

et al. 2002

All Days

View full text Add to dashboard Cite

show abstract

“…The mooring design for a Spar platform could be governed by Hurricane or Loop current environment loads [3]. Loop currents are present in deep water Gulf of Mexico for significant duration and in many cases around 25% of the time.…”

Section: Mooring System Design Considerationsmentioning

confidence: 99%

Mooring Design for Directional Spar Hull VIV

2003

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Key issues for design of Spar mooring systems in the presence of VIV are discussed. The need to consider interactions between the directional effects of the Spar mooring and VIV response, together with the directional distribution of the loop current environment, is highlighted.For instance, the combination of current speed and varying sway natural periods for environment directions between and in-line with mooring groups give rise to variations in reduced velocity. Furthermore, the Spar response itself could be directional due in part to unsymmetric coverage of the VIV suppression strakes and other appurtenances located on the outside of the Spar. Directional stiffness and drag augmentation due to VIV may also affect maximum offsets and mooring line loads.

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Great Australian Bight: New Offshore Frontiers, Challenges and Potential Solutions

Woodhams

Heshmati

Ruskin

2017

Day 4 Thu, May 04, 2017

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The Great Australian Bight(GAB) has been subjected to exploration for the past five decades with no major hydrocarbon discoveries, and could be defined as a new frontier for oil and gas development. BP has recently committed to a drilling campaign in the region and establishing key infrastructure indicating potential for a significant hydrocarbon discovery. The key challenges for developing in this area are; ➢Remoteness–Closest population 300km away, nearest oil & gas infrastructure +1,000km away➢Deep water – Area explored range from 1,000m to 3,000m➢Harsh Environment–100yr storm estimate significant wave height 13m, period 12s, andcurrent 1m/s➢Limited information for long term modelling of the environment This paper has focused on the evaluating different development options against the challenges, with mostof the data being based upon public information from BP drill sites. The focus of the technical feasibility assessment is on the potential production mechanism used to enable the development i.e. fixed or floating platform or other facility. This conceptual review forms the preliminary basis for concept selection for a field in this new and environmentally highly sensitive area and as such it is expected that several potential offshore development options are to be presented.

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Mooring Analysis of a Truss Spar

Cited by 3 publications

References 0 publications

Design of the Truss Spars for the Nansen/Boomvang Field Development

Design of the Truss Spars for the Nansen/Boomvang Field Development

Mooring Design for Directional Spar Hull VIV

Great Australian Bight: New Offshore Frontiers, Challenges and Potential Solutions

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