Ice worthy jack-up drilling unit with pre-loading tension system
US8851799B2 · kind B2 · utility
1Cited by
11References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2011 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jun 7, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0082
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A jack-up rig while in open water operates with the hull jacked up out of the water. However, in the event of ice conditions, the legs are held in place by cans embedded in the sea floor to resist lateral movement of the rig and the hull is lowered into the water into an ice defensive configuration. The hull is specifically shaped with an ice-bending surface to bend and break up ice that comes in contact with the hull while in the ice defensive configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.