Method and apparatus for detonation of distributed charges
US4991684A · kind A · utility
Inventor
Key dates
| Filing date | Apr 13, 1989 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Apr 13, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for geophysical exploration wherein a seismic wave is passed through a bore hole so as to sequentially detonate a plurality of explosive charges disposed within said bore hole at spaced intervals. A preselected seismic wave magnitude represented by a stored voltage is compared with signals generated by electro-acoustic sensors associated with each charge. When the magnitude of a seismic wave in the bore hole equals the preselected magnitude, a voltage stored on a capacitor discharges into a detonator. Means are provided for varying the stored voltage representing the preselected magnitude from the surface of the bore hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.