Inflatable packer
US6230798A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Nov 18, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1277
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic anchor packer for use in a well bore having an inflatable packer element (36) with a cylinder 38 and an elastomer sleeve 44 is provided on the exterior surface thereof. The elastomer sleeve 44 is retained by a suitable adhesive or fixing agent adjacent the cylinder 38 at the end portions of the elastomer sleeve 44 but is free of the cylinder 38 intermediate the end portions. An aperture 48 is defined by the wall of the cylinder 38 and is for connecting the exterior of the cylinder 38 in a region where the elastomer sleeve 44 is free of the interior of the cylinder 38. The anchor packer also has a seat 60 and a drop ball 62 for causing fluid from within the cylinder 38 to flow through the aperture 48 and between the elastomer sleeve 44 and exterior surface of the cylinder 38. The seat 60 and drop ball 62 are also for trapping fluid which has flowed into the chamber between the elastomer sleeve 44 and the cylinder 38 so as to prevent relaxation of the elastomer sleeve 44. The hydraulic anchor packer can be used in both cased and uncased well bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.