Annulus vent system for subsea wellhead assembly
US8794332B2 · kind B2 · utility
0Cited by
9References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 31, 2011 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Nov 16, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/035
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead system for producing hydrocarbons from a subterranean formation that includes concentric tubulars that form an annulus. The annulus is vented by flowing fluid from the annulus through a bleed line having a valve that is selectively opened and closed. Upstream of the bleed line valve, the bleed line is routed adjacent a production flow line. The temperature of the fluid in the production flow line is greater than annulus temperature and warms the bleed line. Hydrate formation in the bleed line is thereby inhibited by the thermal energy it receives from the production flow line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.