Annular pressure spool
US6840327B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2002 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Dec 29, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/46
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well bore pressure containment device is provided. Operating as a single stripping and containment device compatible with a wide range of tool string and tubing sizes, the containment device may be integrated with rotating pressure control systems, and be used during completion and work over operations. The containment device has a spool, and a flexible bladder extending about the interior of the spool. The bladder may be controllably deformed to seal against a tool string passing through the device using an inwardly directed pressure, which preferably is exerted by a fluid in the interstitial space between the spool and the bladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.