Perforation gun pressure-actuated electrical switches and methods of use
US7902469B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 28, 2008 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Oct 28, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42C15/32
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Pressure-actuated electrical switches are provided that comprise a housing having a slidable piston therein. The slidable piston slides from a first position to a second position and in so doing switches an electrical path from a first electrical contact and a second electrical contact to an electrical path between the first electrical contact and a third electrical contact. Suitable applications of such switches include any application in which a pressure wave is used to actuate an electrical switch. The pressure-actuated electrical switches of the present invention are especially adapted for use in controlling successive detonations in a downhole perforation gun, as explosive gases and pressure waves are used to actuate the slidable piston so as to trigger a subsequent detonation charge. Perforation guns utilizing these pressure-actuated electrical switches and corresponding methods of use are also provided herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.