Offshore oil-drilling rig and methods for installing same on an offshore oil-drilling site
US7690866B2 · kind B2 · utility
0Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2005 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An offshore oil-drilling rig comprising a deck mounted mobile on legs, each leg including a support base on the sea floor and a caisson open at its base and designed to penetrate into the sea floor. Each caisson is arranged inside the leg and is mobile along the axis of the leg between a retracted upper position and a projecting lower position at which it is anchored on the sea floor. The invention also concerns methods for installing such a rig on an oil-drilling site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.