The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2016
Filed:
Jan. 07, 2015
Bp Corporation North America, Inc., Houston, TX (US);
Bp Exploration Operating Company Limited, Middlesex, GB;
Roy Shilling, Houston, TX (US);
Paul W. Gulgowski, Jr., Houston, TX (US);
Philip D. Maule, Leatherhead, GB;
Kevin Kennelley, Keman, TX (US);
Walter Greene, Houston, TX (US);
Robert W. Franklin, Katy, TX (US);
Vicki Corso, Richmond, TX (US);
Tony Oldfield, Surrey, GB;
Adam L. Ballard, Katy, TX (US);
Graeme Steele, Houston, TX (US);
David E. Wilkinson, Houston, TX (US);
Ricky Thethi, Houston, TX (US);
Chau Nguyen, Houston, TX (US);
Steve Hatton, Surrey, GB;
BP Corporation North America Inc., Houston, TX (US);
Abstract
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.