Bi-directionally boosting and internal pressure trapping packing element system
US7172029B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2005 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/128
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a top sleeve; (2) a bottom sleeve; and (3) a booster sleeve. A packing element is disposed circumferentially around the outer surface of the booster sleeve. The top sleeve and bottom sleeve each include an upper compression member which rides across the booster sleeve in order to compress the packing element. The packing element is expanded outward from the packer to engage a surrounding string of casing through compressive forces provided by the top and bottom sleeves. Thereafter, differential pressure applied above or below the packer acting on the packer element and booster sleeve may provide additional compression of the packer element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.