Select fire jet perforating apparatus
Abstract
Abstract JACENT ELECTRODE WHICH CAN BE SUBSEQUENTLY CONTACTED BY A SOURCE OF CURRENT SO AS TO DETONATE THE PERFORATING MEANS TO WHICH IT IS ELECTRICALLY CONNECTED. A PERFORATING APPARATUS HAVING SEPARATE CHAMBERS FORMED THEREIN, AND WITHIN WHICH THERE IS DISPOSED ELECTRICALLY ACTUATED EXPLOSIVE PERFORATING MEANS. THE APPARATUS INCLUDES A FIRING HEAD HAVING A PLURALITY OF ELECTRODES RECEIVED THEREIN AND SUPERIMPOSED ONE UPON ANOTHER AND ELECTRICALLY INSULATED FROM ONE ANOTHER. ONE OF EACH ELECTRODE IS ELECTRICALLY CONNECTED TO AT LEAST ONE OF THE PERFORATING MEANS SO THAT WHEN A SOURCE OF CURRENT IS APPLIED TO THE ELECTRODE IT DETONATES THE PERFORATING MEANS, WHEREAFTER THE ELECTRODES IS REMOVED FROM THE FIRING HEAD SO AS TO OPERATIVELY EXPOSED THE NEXT BELOW AD-
Inventors
- 👤 R Vann
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |