Intermediate casing annulus monitor
US5366017A · kind A · utility
31Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsea well has communication passages to enable annulus pressure between the inner and intermediate strings of casing to be monitored at the surface. The communication passages include a passage through the upper casing hanger. This passage registers with a passage through the tubing hanger assembly. The passage in the tubing hanger assembly registers with a passage in the tree assembly. The passage in the tree assembly has an outlet at the exterior of the tree assembly, where it connects to a communication line that extends to production equipment at the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.