Method and apparatus for activating an electric wireline firing system
US5571986A · kind A · utility
64Cited by
20References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1995 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Jul 20, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/1185
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus of activating electric wireline firing systems in which a firing pin is restrained against movement toward a detonator until application of sufficient voltage to the apparatus. The firing pin is not permitted to move immediately upon application of voltage to the apparatus thereby providing a period during which voltage may be interrupted to prevent detonation of the system. The requisite voltage which must be applied to the apparatus is relatively high thereby ensuring against premature detonation of the system due to high radio frequencies, stray voltages or other electrical influences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.