Dual-derrick ice-worthy jack-up drilling unit
US8911179B2 · kind B2 · utility
6Cited by
6References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 14, 2012 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | May 28, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention relates to a jack-up rig. The inventive rig would work like a conventional jack-up rig while in open water with the hull jacked up out of the water. However, in the event of ice conditions, the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with a lower portion that is an ice-bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration. Furthermore, the jack-up rig comprises at least two derricks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.