Patent US3149684A successfully refreshed from Google Patents.
US3149684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air drilling method with formation water seal-off
Assignee: Jersey Production Research Co
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Filing: 1961-11-28
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Granted: 1964-09-22
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 John E Eckel
- 👤 Julius P Gallus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:41
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN THE ROTARY DRILLING OF EARTH BOREHOLES WHEREIN A GAS IN USED AS A CIRCULATING FLUID FOR CARRYING DRILLED MATERIAL FROM THE BOREHOLE AND WHEREIN A WATER-BEARING FORMATION IS ENCOUNTERED, THE IMPROVED METHOD OF SEALING OFF SAID WATER-BEARING FORMATION WHICH COMPRISES INTERRUPTING THE FLOW OF SAID GASEOUS CIRCULATING FLUID CAPABLE OF SELECTIVELY SEALING OFF SAID WATER-BEARING FORMATION, CONTINUING SAID DRILLING THROUGHOUT SAID WATER-BEARING FORMATION UNTIL THE FORMATION IS SEALED AND THEREAFTER RESUMING THE CIRCULATION OF SAID GASEOUS FLUID.
References Cited (Backward Citations)
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US3027943A
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US2999551A
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |