Offshore drilling rig transfer
US4973198A · kind A · utility
23Cited by
10References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0086
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method and apparatus for transferring a derrick from a jack-up rig to an offshore platform are disclosed which include positioning the rig and platform next to each other, providing an elevator pad on the platform that is set at the same level as the deck of the rig, installing skid beams between the deck of the rig and the top of the elevator pad, skidding the rig from the rig to the pad, and lowering the pad and derrick to the normal level of the platform for use in drilling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.