Downhole sub with hydraulically actuable sleeve valve
US8757273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | May 3, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7787
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for opening a port through the wall of a ported sub including providing a sub with a port through its tubular side wall and providing a hydraulically actuatable valve to cover the port, the valve being actuatable to move away from a position covering the port to thereby open the port. The method further includes increasing pressure within the sub to create a pressure differential across the valve to move the valve toward the low pressure side, while the port remains closed by the valve, thereafter reducing pressure within the sub to reduce the pressure differential and driving the valve to move it away from a position covering the port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.