US3890239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfactant compositions useful in oil recovery processes
Assignee: Sunoco Inc
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Filing: 1974-05-03
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Granted: 1975-06-17
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Expires: 1994-05-03
Abstract
Abstract A surfactant composition useful in recovering oil by waterflooding with brine comprises a mixture of an organic sulfonate surfactant, a sulfated or sulfonated oxyalkylated alcohol and a polyalkylene glycol alkyl ether.
Inventors
- 👤 Dale W Dycus
- 👤 Earl W Malmberg
- 👤 Harry L Wilchester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
A SURFACTANT COMPOSITION FOR USE IN FLOODING OIL-BEARING FORMATIONS COMPRISING A MIXTURE OF A. 0.5-15 PARTS BY WEIGHT OF A SURFACTANT SALT OF AN ORGANIC SULFONATE B. 0.25-10 PARTA BY WEIGHT OF A POLYALKYLENE GLYCOL ALKYL ETHER AND C. 0.25-10 PARTS BY WEIGHT OF A SALT OF A SULFONATED OR SULFATED OXYALKYLATED ALCOHOL IN WHICH THE CATIONIC PORTION OF THE SALTS OF COMPONENTS (A) AND (C) IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AMINE AND AMMONIUM.
Claim 2
Dependent Claim
78 words
A SURFACTANT COMPOSITION FOR USE IN FLOODING OIL-BEARING FORMATIONS COMPRISING A MIXTURE OF A. 0.5-15 PARTS BY WEIGHT OF A SURFACTANT SALT OF AN ORGANIC SULFONATE B. 0.25-10 PARTA BY WEIGHT OF A POLYALKYLENE GLYCOL ALKYL ETHER AND C. 0.25-10 PARTS BY WEIGHT OF A SALT OF A SULFONATED OR SULFATED OXYALKYLATED ALCOHOL IN WHICH THE CATIONIC PORTION OF THE SALTS OF COMPONENTS (A) AND (C) IS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AMINE AND AMMONIUM.
Claim 3
Dependent Claim
42 words
Composition according to claim 1 wherein Component (a) is an alkali metal salt of a petroleum sulfonate containing 12-30 carbon atoms, Component (b) is diethylene glycol hexyl ether and Component (c) is an alkali metal salt of a sulfated polyethoxylated primary alcohol.
Claim 4
Dependent Claim
23 words
Composition according to claim 1 wherein the amounts of Components (a), (b) and (c) respectively are 2-10 parts, 1-8 parts and 1-8 parts.
Claim 5
Dependent Claim
56 words
A SURFACTANT COMPOSITION FOR USE IN FLOODING OIL-BEARING FORMATIONS COMPRISING A MIXTURE OF (A) 0.5-15 PARTS BY WEIGHT OF A SURFACTANT SALT OF AN ORGANIC SULFONATE AND (B) 0.5-15 PARTS BY WEIGHT OF A SALT OF A SULFONATED OXYALKYLATED ALCOHOL, EACH OF SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL, AMINE AND AMMONIUM.
Claim 6
Dependent Claim
56 words
A SURFACTANT COMPOSITION FOR USE IN FLOODING OIL-BEARING FORMATIONS COMPRISING A MIXTURE OF (A) 0.5-15 PARTS BY WEIGHT OF A SURFACTANT SALT OF AN ORGANIC SULFONATE AND (B) 0.5-15 PARTS BY WEIGHT OF A SALT OF A SULFONATED OXYALKYLATED ALCOHOL, EACH OF SAID SALTS BEING SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL, AMINE AND AMMONIUM.
Claim 7
Dependent Claim
35 words
Composition according to claim 4 wherein Component (a) is an alkali metal salt of a petroleum sulfonate containing 12-30 carbon atoms and Component (b) is an alkali metal salt of a sulfonated polyethoxylated primary alcohol.
Claim 8
Dependent Claim
31 words
Composition according to claim 4 wherein brine is also present and the amount of Components (a) and (b) is 1-8 percent of each, based on the weight of the total composition.
References Cited (Backward Citations)
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Cited
US3638728A
Cited
US3637017A
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |