Sliding sleeve valve and seal ring for use therein
US6044908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sliding sleeve valve for controlling fluid flow between a well annulus and a string of well conduit, the valve including a slidable sleeve disposed coaxially within an outer housing, the valve being provided with a primary seal member carried by the housing for sealing engagement with the housing and the sleeve characterized in that the primary seal member, in a relaxed condition, comprises an annular, monolithic body having a first, radially outwardly facing, annularly extending seal surface and a second, radially inwardly facing, annularly extending seal surface, the second seal surface having at least one annularly extending, radially inwardly projecting rib, the rib having a radially innermost convex portion when viewed in transverse cross-section, annularly extending reliefs being formed on axially opposite sides of the rib, the seal member being made of a substantially non-elastomeric material that has sufficient memory to provide an interference seal between the seal member and the housing, and the seal member and the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.