Self-energized downhole tool
US7552777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2005 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | May 22, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Setting mechanisms for downhole tools are described that take advantage of hydrostatic pressure in the wellbore which is harnessed to set a tool after exposure to well fluids for a given time or temperature defeats a lock and allows hydrostatic forces to trigger the setting of the tool. Alternatively, some other biasing source is released to set the downhole tool after exposure to well fluids for a time or a temperature and time defeats a lock and allows the biasing source to set the tool. While applications to packers are preferred, other downhole tools can be set in his manner removing the need for an inner string, dropping a ball on a seat or pressurizing the wellbore to achieve the setting of the downhole tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.