Movable wellbay assembly
US10865608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Sep 30, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B2021/203
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mobile offshore drilling unit is converted to provide drilling, completion and workover access to multiple dry tree wells from a drilling derrick to allow production and export of oil and gas from high pressure, high temperature reservoirs in deep offshore waters. Existing practice has been for the drilling derrick on a production platform supporting dry tree wells to be moved over a fixed well slot. The present invention provides a movable wellbay that supports multiple top-tensioned subsea well tieback risers, which may be positioned directly below the derrick's rotary table and/or beneath another operating device. The use of top-tensioned subsea well tieback risers supported by the movable wellbay allows the converted facility to drill, complete, maintain, improve and produce from subsea wells through dry trees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.