US3303878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving injectivity of input wells in waterflood process
Assignee: Mobil Oil AS
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Filing: 1963-08-27
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Granted: 1967-02-14
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Expires: 1983-08-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl Connally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN THE SECONDARY RECOVERY OF OIL FROM A SUBTERRANEAN FORMATION PENETRATED BY AT LEAST ONE INPUT WELL AND ONE OUTPUT WELL WHEREIN WATER IS INTRODUCED INTO SAID INPUT WELL AND FORCED THROUGH SAID FORMATION TO DISPLACE OIL FROM SAID FORMATION THROUGH SAID OUTPUT WELL, THE STEP OF INCREASING COMPRISE INJECTING THROUGH SAID INPUT WELL INTO THE PORTION OF SAID FORMATION SURROUNDING SAID INPUT WELL LIQUID AMMONIA IN AN AMOUNT RANGING FROM ABOUT 1 BARREL TO ABOUT 10 BARRELS PER FOOT OF THICKNESS OF SAID FORMATION TO BE TREATED, SAID AMMONIA BEING INJECTED AT A PRESSURE IN EXCESS OF THE VAPOR PRESSURE OF SAID AMMONIA AT THE TEMPERATURE OF SAID FORMATION.
Claim 2
Dependent Claim
110 words
IN THE SECONDARY RECOVERY OF OIL FROM A SUBTERRANEAN FORMATION PENETRATED BY AT LEAST ONE INPUT WELL AND ONE OUTPUT WELL WHEREIN WATER IS INTRODUCED INTO SAID INPUT WELL AND FORCED THROUGH SAID FORMATION TO DISPLACE OIL FROM SAID FORMATION THROUGH SAID OUTPUT WELL, THE STEP OF INCREASING COMPRISE INJECTING THROUGH SAID INPUT WELL INTO THE PORTION OF SAID FORMATION SURROUNDING SAID INPUT WELL LIQUID AMMONIA IN AN AMOUNT RANGING FROM ABOUT 1 BARREL TO ABOUT 10 BARRELS PER FOOT OF THICKNESS OF SAID FORMATION TO BE TREATED, SAID AMMONIA BEING INJECTED AT A PRESSURE IN EXCESS OF THE VAPOR PRESSURE OF SAID AMMONIA AT THE TEMPERATURE OF SAID FORMATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |