Wellhead having an integrated safety valve and method of making same
US8881827B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2009 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | May 20, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead for subsea use and a method of making same where the wellhead is constituted by a body having a bore (3) therethrough and at least one side bore (9, 11) for provision of fluid communication through the wall of the wellhead (1), and where the wellhead (1) includes a pipe hanger (30) provided with a bore (34) therethrough and a side bore (36) for provision of fluid communication between a tubing string (9′) connected to the pipe hanger (30) and one of the side bores (9) of the wellhead (1), where the wellhead (1) is provided with at least one internal safety valve (42, 44) arranged to be able to shut off fluid communication through the wellhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.