Downhole tool with pressure balancing
US7290604B2 · kind B2 · utility
22Cited by
3References
8Claims
0Family size
Inventor
Key dates
| Filing date | Nov 4, 2003 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/1135
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool is provided that creates balancing forces that allow a tool such as ajar to continue to function when intrusion of gas into the fluid chamber of the jar occurs to cause gas pressure in the jar to exceed hydrostatic pressure. The excess pressure is balanced by forming an area acted on by the gas pressure equal to the cross-sectional area of the mandrel, such that the forces on the mandrel are equal and opposite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.