Directional drilling marine structure
US4136996A · kind A · utility
44Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | May 23, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/015
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Marine structure adapted to be fixed to the ocean floor for drilling wellbores into the latter. A drill conductor cage is removably positioned within the marine structure at a submerged position. The cage holds one or more drill string guides in a manner that directionally oriented wells can be drilled without movement of the structure. The cage is readily disengaged from its under-water working position in order that it can be brought to the water's surface, or otherwise adjusted to facilitate the addition of further conductor guides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.