Downhole sequentially-firing casing perforating gun with electronically-actuated wireline release mechanism, and actuation circuit therefor
US8264814B2 · kind B2 · utility
22Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2009 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Feb 10, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/1193
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole release tool for use in conjunction with multiple select-fire perforating guns and a method for electronically actuating the release tool using either positive or negative control voltage. In a preferred embodiment, the release tool employs operating circuitry that allows actuation of the release tool by either a positive or a negative voltage at an absolute magnitude greater than the absolute magnitude of positive or negative voltages used to arm or fire the perforating guns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.