US3353597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation flooding by sulphur dioxide for recovering oil and gas
Assignee: Home Oil Co Ltd
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Filing: 1967-01-16
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Granted: 1967-11-21
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Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Mulder Fritho R Erick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:48
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM AN OIL-BEARING EARTH FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND BY AT LEAST ONE RECOVERY WELL SPACED THEREFROM, THE TWO STEP METHOD WHICH COMPRISES (A) INTRODUCING LIQUEFIED SULPHUR DIOXIDE INTO THE FORMATION THROUGH AN INJECTION WELL TO FORM A BANK OF LIQUID SULPHUR DIOXIDE IN THE FORMATION ADJACENT SAID WELL AND (B) THEREAFTER INTRODUCING THROUGH SAID INJECTION WELL A BACKING FLUID COMPRISING WATER ACIDULATED BY A MINOR PROPORTION OF DISSOLVED SULPHUR DIOXIDE INTO SAID FORMATION IMMEDIATELY BEHIND SAID BANK SUFFICIENT TO DRIVE THROUGH THE FORMATION TO SAID RECOVERY WELL, SAID BANK AND PETROLEUM DISPLACED FROM THE FORMATION AND WITHOUT CYCLICAL REPETITION OF STEPS (A) AND (B), RECOVERING SAID PETROLEUM THROUGH SAID RECOVERY WELL.
Claim 2
Dependent Claim
122 words
IN THE SECONDARY RECOVERY OF PETROLEUM FROM AN OIL-BEARING EARTH FORMATION PENETRATED BY AT LEAST ONE INJECTION WELL AND BY AT LEAST ONE RECOVERY WELL SPACED THEREFROM, THE TWO STEP METHOD WHICH COMPRISES (A) INTRODUCING LIQUEFIED SULPHUR DIOXIDE INTO THE FORMATION THROUGH AN INJECTION WELL TO FORM A BANK OF LIQUID SULPHUR DIOXIDE IN THE FORMATION ADJACENT SAID WELL AND (B) THEREAFTER INTRODUCING THROUGH SAID INJECTION WELL A BACKING FLUID COMPRISING WATER ACIDULATED BY A MINOR PROPORTION OF DISSOLVED SULPHUR DIOXIDE INTO SAID FORMATION IMMEDIATELY BEHIND SAID BANK SUFFICIENT TO DRIVE THROUGH THE FORMATION TO SAID RECOVERY WELL, SAID BANK AND PETROLEUM DISPLACED FROM THE FORMATION AND WITHOUT CYCLICAL REPETITION OF STEPS (A) AND (B), RECOVERING SAID PETROLEUM THROUGH SAID RECOVERY WELL.
References Cited (Backward Citations)
GB696524A
Cited
US2968350A
Cited
US2859818A
Cited
US2910123A
Cited
US3120262A
Cited
US3249157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |