Deviated drilling apparatus
US4249619A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Jun 4, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02B2017/0095
- 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 or conductor guides in a manner that a number of directionally oriented wells can be drilled without movement of the structure. The cage is readily disengaged from its underwater working position to permit it to be raised to the water's surface and is then swung outboard of the platform's working deck. In such a position the addition and removal of drilling cnductors is facilitated without undue use of limited deck space on the platform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.