Subterranean valve operated by string relative movement
US8393396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2009 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A valve is mounted to a tubular string and has an actuation assembly that is isolated from well fluids. The valve member can be a ball that rotates on a pivot and is actuated by relative rotation of string components that straddle the ball. Rotation of one string component is linked to the closure ball by an external slanted slot with an operating ball that rides in it and connects the rotating string component to the closure ball. Travel stops limit the desired rotation of the closure ball in opposed directions. The closure ball can alternatively be rotated by relative longitudinal string component movement that is converted to relative rotation such as through the use of a j-slot mechanism. Internal seals isolate the slanted slot and operating ball from well fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.