Paired helically indented methods and systems for VIV suppression of drilling riser buoyancy module for fluid submerged cylinders
US10006254B2 · kind B2 · utility
3Cited by
4References
3Claims
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Inventor
Key dates
| Filing date | Nov 10, 2016 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Nov 10, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/012
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments disclosed herein describe cylindrical structures with indents configured to reduce vortex induced vibrations (VIV). For example, the cylindrical structures may be configured to reduce VIV for drilling risers subject to ocean currents. In embodiments, the indents may be positioned on an outer surface of the cylindrical structures, wherein the indents may be parallel pairs. The pairs may be mirrored between a first end and a second end of the cylindrical structure, and be positioned in a helical pattern, which may be continuous or staggered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.