US3080919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for closing down an injection well during thermal recovery operations
Assignee: Texaco Inc
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Filing: 1960-09-16
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Granted: 1963-03-12
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Expires: 1980-09-16
Abstract
No abstract record available.
Inventors
- 👤 Don L Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:38
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
135 words
IN A THERMAL RECOVERY OPERATION OF HYDROCARBONS CONTAINED IN AN UNDERGROUND FORMATION TRAVERSED BY A WELL BORE WHERIN AIR IS INTRODUCED INTO SAID FORMATION THROUGH A STRING OF TUBING POSITION IN SAID WELL BORE AND HAVING A PACKER FIXED THERELONG ADJACENT SAID FORMATION AND PRESSURIZED IN THE ANNULUS BETWEEN SAID STRING OF TUBING AND THE CASING OF SAID WELL BORE BY A NONCOMBUSTIBLE HEAVIER-THAN-OIL FLUID, THE STEPS OF CEASING THE POSITION OF AIR TO SAID FORMATION THROUGH SAID TUBING, PURGING SAID WELL BORE BELOW SAID PACKER WITH AN INERT GAS AND PROVIDING A PETROLEUM PRODUCT THROUGH SAID STRING OF TUBING TO SAID FORMATION ADJACENT SAID WELL BORE, CLOSING OFF IN SAID STRING OF TUBING COMMUNICATION BETWEEN SAID FORMATION AND THE SURFACE ABOVE SAID WELL BORE BY A CLOSE-OFF PLUG IN SAID STRING OF TUBING ADJACENT
References Cited (Backward Citations)
US2906340A
Cited
US2958380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |