Non-orienting tree cap
US7621338B2 · kind B2 · utility
8Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2007 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead assembly includes a tree cap having a production mandrel extending down into a production passage of a Christmas tree to form a seal. The tree has an annulus bore and an annular cavity at the upper end of the tree surrounding the upper ends of the production and annulus bore. A communication gallery leads between the annulus bore and the cavity. The tree cap also includes an annular sealing member that enters the cavity for sealing a communication gallery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.