US3776323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for operating an electrical device and a selectively fired perforator utilizing a common transmission channel
Assignee: Western Atlas International Inc
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Filing: 1972-05-11
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Granted: 1973-12-04
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Expires: 1992-05-11
Abstract
Abstract AN ELECTRICALLY OPERATED DEVICE IN A SUBSURFACE WELL INSTRUMENT AND SELECTIVELY FIRED PERFORATING GUNS IN THE SUBSURFACE WELL INSTRUMENT ARE OPERATED USING A SINGLE CONDUCTOR CABLE. A SWITCHING MEANS INCUDING A DOUBLE POLE, DOUBLE THROW LATCHING RELAY ALLOWS THE SINGLE CONDUCTOR CABLE TO BE ELECTRICALLY CONNECTED TO EITHER THE ELECTRICALLY OPERATED DEVICE OR THE SELECTIVELY FIRED PERFORATOR. UPON COMMAND FROM THE SURFACE, THE SWITCHING MEANS WILL COUPLE THE APPROPRIATE SUBSURFACE UNIT TO THE SURFACE ELECTRONICS AND THE SUBSURFACE UNIT MAY BE ACTUATED TO PERFORM THE DESIRED OPERATION IN THE WELL.
Inventors
- 👤 W Spidell
- 👤 B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/1185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |