Apparatus and method for subsea connections of trees to subsea wellheads
US5868203A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1998 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Apr 28, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus utilizing a tree running tool (120) for guiding a conventional or horizontal tree (150) for the purpose of connection to a subsea wellhead or wellhead system (110) without the use of guidelines or guide funnels as shown in the embodiment of FIGS. 3 and 4. The horizontal tree (150) has an orientation sleeve (154) projecting downwardly from tree body (150), and the tree running tool (120) has a lower stabbing extension or stinger (100) which extends below the orientation sleeve for guiding and aligning the orientation sleeve (154) into engagement with a high pressure wellhead housing (153) and associated production casing hanger (159) for connection of the tree body (150) to the high pressure wellhead housing (153).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.