US3610339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfactant mixture in waterflooding
Assignee: Phillips Petroleum Co
•
Filing: 1969-02-14
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Granted: 1971-10-05
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Expires: 1989-02-14
Abstract
Abstract A method for recovering oil from a formation by injecting an aqueous solution containing two surfactants which are ethylene oxide adducts of alkyl phenols, one surfactant being a solubilizing agent for the other, into that formation; an aqueous liquid containing a viscosifying agent maybe injected behind the surfactant solution.
Inventors
- 👤 Robert R Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
The method as recited in claim 1 wherein the concentration of each of said surface active agents in said aqueous mixture is 12.5 weight per cent based on the total weight of the aqueous liquid.
Claim 2
Dependent Claim
82 words
The method of claim 1 wherein a predetermined amount of said aqueous liquid containing said mixture is injected in said formation and further comprising injecting into said formation behind said predetermined amount of said aqueous liquid containing said mixture an aqueous liquid containing a viscosifying agent, the amount of said viscosifying agent being such to increase the viscosity of said aqueous liquid containing amounts thereof to at least equal the viscosity of said aqueous solution containing said mixture of surface active agents.
Claim 3
Dependent Claim
23 words
The method as recited in claim 3 wherein said viscosifying agent is selected from the group consisting of polysaccharides and partially hydrolyzed polyacrylamides.
Claim 4
Dependent Claim
24 words
The method as recited in claim 4 wherein a predetermined amount of said aqueous liquid containing said viscosifying agent is injected into said formation.
Claim 5
Dependent Claim
39 words
The method as recited in claim 5 wherein said predetermined volumes of said aqueous liquid containing said mixture of said surface actIve agents and said aqueous liquid containing said viscosifying agent both equal 0.1 pore volumes of said formation.
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |