Packer apparatus with annular check valve
US7472746B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Oct 10, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/124
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well packer assembly with an annular fluid bypass and a check valve. The well packer assembly has an upper packer apparatus and a lower packer apparatus with a stimulation port therebetween. An annular fluid bypass in the upper packer apparatus communicates the well annulus from above packer elements on the upper packer apparatus to below the packer elements. The well fluid circulated through the fluid bypass is discharged into the well annulus below the packer elements on the upper packer apparatus to circulate stimulation fluid through the stimulation port and upwardly through the upper packer apparatus and the tubing used to lower the upper packer apparatus into the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.