Self boosting packing element
US7392841B2 · kind B2 · utility
69Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2005 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | May 28, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1208
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A packer assembly features one or more elements that preferably swell when in contact with well fluids and have a feature in them that responds to an applied load in a given direction by retaining such a boost force with a locking mechanism. A single element can have two such mechanisms that respond to applied forces from opposed directions. Friction force for adhering the element to the mandrel is enhanced with surface treatments between them that still allow the locking mechanisms to operate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.