US3344858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of oil by aqueous drive with surfactant formed in situ
Assignee: Phillips Petroleum Co
•
Filing: 1965-09-02
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Granted: 1967-10-03
•
Expires: 1985-09-02
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Gilchrist
- 👤 Richard J Sonnenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM COMPRISING THE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU A WELL THEREIN A SLUG OF AN AQUEOUS ALKALI SOLUTION CPABL OF FORMING SURFACTANT WITH THE ACID OF STEP (2); (2) THEREAFTER, INJECTING A SLUG OF SURFACTANT FORMING ORGANIC ACID DISSOLVED IN A LIGHT HYDROCARBON, SO AS TO CAUSE MIXING OF SAID ALKALI AND ACID ADJACENT THE INTERFACE OF THE SLUGS TO FORM SURFACTANT; (3) DRIVING THE SURFACTANT FORMED IN THE STEP (2) THRU SAID STRATUM TOWARD A PRODUCTION WELL TO DESPLACE OIL INTO SAID PRODUCTION WELL; AND (4) RECOVERING THE PRODUCED OIL FRO SAID PRODUCTION WELL.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRODUCING OIL FROM AN OIL-BEARING STRATUM COMPRISING THE STEPS OF: (1) INJECTING INTO SAID STRATUM THRU A WELL THEREIN A SLUG OF AN AQUEOUS ALKALI SOLUTION CPABL OF FORMING SURFACTANT WITH THE ACID OF STEP (2); (2) THEREAFTER, INJECTING A SLUG OF SURFACTANT FORMING ORGANIC ACID DISSOLVED IN A LIGHT HYDROCARBON, SO AS TO CAUSE MIXING OF SAID ALKALI AND ACID ADJACENT THE INTERFACE OF THE SLUGS TO FORM SURFACTANT; (3) DRIVING THE SURFACTANT FORMED IN THE STEP (2) THRU SAID STRATUM TOWARD A PRODUCTION WELL TO DESPLACE OIL INTO SAID PRODUCTION WELL; AND (4) RECOVERING THE PRODUCED OIL FRO SAID PRODUCTION WELL.
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |