US3330347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of oil recovery using surfactants formed in situ
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1964-10-30
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Granted: 1967-07-11
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Expires: 1984-10-30
Abstract
No abstract record available.
Inventors
- 👤 William O Brown
- 👤 Jr Claude E Cooke
- 👤 Patrick H Monaghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A WATERFLOOD DISPLACEMENT PROCESS FOR INCREASING OIL RECOVERY FROM AN UNDERGROUND RESERVOIR PENETRATED BY SPACED-APART WATER INJECTION AND OIL-PRODUCTION WELLS IN WHICH REACTIVE, OIL-SOLUBLE ORGANIC ACID MATERIAL IN THE OIL PHASE OF THE RESERVOIR AND REACTIVE, WATER-SOLUBLE BASIC MATERIAL IN THE INJECTED FLOODWATER REACT TO PRODUCE SURFACE-ACTIVE MATERIAL AT THE OIL-WATER INTERFACE, THE IMPROVEMENT COMPRISING TREATING SAID FLOODWATER PRIOR TO INJECTION THEREOF INTO SAID RESERVOIR TO REDUCE THE BIVALENT CATION CONCENTRATION THEREOF.
Claim 2
Dependent Claim
73 words
IN A WATERFLOOD DISPLACEMENT PROCESS FOR INCREASING OIL RECOVERY FROM AN UNDERGROUND RESERVOIR PENETRATED BY SPACED-APART WATER INJECTION AND OIL-PRODUCTION WELLS IN WHICH REACTIVE, OIL-SOLUBLE ORGANIC ACID MATERIAL IN THE OIL PHASE OF THE RESERVOIR AND REACTIVE, WATER-SOLUBLE BASIC MATERIAL IN THE INJECTED FLOODWATER REACT TO PRODUCE SURFACE-ACTIVE MATERIAL AT THE OIL-WATER INTERFACE, THE IMPROVEMENT COMPRISING TREATING SAID FLOODWATER PRIOR TO INJECTION THEREOF INTO SAID RESERVOIR TO REDUCE THE BIVALENT CATION CONCENTRATION THEREOF.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |