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Marine subsea free-standing riser systems and methods
A free-standing riser system connects a subsea source to a surface structure. The system includes a concentric free-standing riser comprising inner and outer risers defining an annulus there between. A lower end of the riser is fiuidly coupled to the subsea source through a lower riser assembly (LRA) and one or more subsea flexible conduits. An upper end of the riser is connected to a buoyancy assembly and the surface structure through an upper riser assembly (URA) and one or more upper flexible conduits, the riser also mechanically connected to a buoyancy assembly that applies upward tension to the riser. The riser may be insulated for flow assurance, either by a flow assurance fluid in the annulus, insulation of the outside of the outer riser, or both. The system may include a hydrate inhibition system and/or a subsea dispersant system. The surface structure may be dynamically positioned.
Marine subsea free-standing riser systems and methods
A free-standing riser system connects a subsea source to a surface structure. The system includes a concentric free-standing riser comprising inner and outer risers defining an annulus there between. A lower end of the riser is fiuidly coupled to the subsea source through a lower riser assembly (LRA) and one or more subsea flexible conduits. An upper end of the riser is connected to a buoyancy assembly and the surface structure through an upper riser assembly (URA) and one or more upper flexible conduits, the riser also mechanically connected to a buoyancy assembly that applies upward tension to the riser. The riser may be insulated for flow assurance, either by a flow assurance fluid in the annulus, insulation of the outside of the outer riser, or both. The system may include a hydrate inhibition system and/or a subsea dispersant system. The surface structure may be dynamically positioned.
Marine subsea free-standing riser systems and methods
SHILLING ROY (Autor:in) / GULGOWSKI PAUL W (Autor:in) / MAULE PHILIP D (Autor:in) / KENNELLEY KEVIN (Autor:in) / GREENE WALTER (Autor:in) / FRANKLIN ROBERT W (Autor:in) / CORSO VICKI (Autor:in) / OLDFIELD TONY (Autor:in) / BALLARD ADAM L (Autor:in) / STEELE GRAEME (Autor:in)
24.09.2015
Patent
Elektronische Ressource
Englisch
MARINE SUBSEA FREE-STANDING RISER SYSTEMS AND METHODS
| Europäisches Patentamt | 2020
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