Through riser installation of tree block
US8011436B2 · kind B2 · utility
26Cited by
26References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2007 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Feb 12, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsea well assembly has a tubing hanger that lands and seals in a wellhead housing. A tree block is lowered through the drilling riser into engagement with the tubing hanger. The tree block has a lower portion that inserts and latches into the bore of the wellhead housing. The drilling riser is disconnected, and a module is lowered onto the tree block, the module having a choke and controls for controlling the well. The master valve for production is the downhole safety valve in the tubing. The wing production valve is a ball valve located in the flow passage of the tree block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.