Multi-purpose pressure operated downhole valve
US7841412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | May 20, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole valve features a flow port that can be selectively obstructed by a pressure actuated sleeve that is movable in a pin and slot mechanism to rotate while being cycled up and down by application and removal of pressure in a cyclical manner. When the sleeve is cycled to the port closed position, a flapper mounted near its upper end can fall on a seat on the sleeve to allow pressure to be applied to the flapper and sleeve, causing the sleeve to move to a position that will prevent fluid loss from the tubular string into the formation. The Closed flapper allows pressure cycles of the sleeve. A double closure against fluid loss can be affected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.