Systems and methods for riser coupling
US-9222318-B2 · Dec 29, 2015 · US
Marine subsea free-standing riser systems and methods
US8960302B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8960302-B2 |
| Application number | US-201113156224-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 8, 2011 |
| Priority date | Oct 12, 2010 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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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 fluidly 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.
First claim
Opening claim text (preview).
What is claimed is: 1. A free-standing riser system connecting a subsea hydrocarbon fluid source to a surface structure, the system comprising: a concentric free-standing riser comprising inner and outer risers defining an annulus there between, a lower end of the riser fluidly coupled to the subsea source through a lower riser assembly (LRA) and one or more subsea flexible conduits, and an upper end of the riser coupled to a subsea buoyancy assembly and fluidly coupled to the sur…
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Classifications
- E21B17/01Primary
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
- E21B17/015Primary
Fixed Constructions · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US8960302B2 cover?
- 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 fluidly 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 …
- Who is the assignee on this patent?
- Shilling Roy, Gulgowski Jr Paul W, Maule Philip D, and 13 more
- What technology area does this patent fall under?
- Primary CPC classification E21B17/01. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Feb 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).