US4058467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonate water flood additives and method of using same
Assignee: ConocoPhillips Co
•
Filing: 1976-06-28
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Granted: 1977-11-15
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Expires: 1996-06-28
Abstract
Abstract Sulfonates having an equivalent weight of about 300 to about 600 are saturated with carbon dioxide and injected into a petroliferous formation to improve a waterflood process.
Inventors
- 👤 Roy C. Sias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/594; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
In a method for recovering hydrocarbons from a petroliferous formation which comprises injecting an aqueous fluid into the formation through an injection well and recovering displaced hydrocarbons from the formation through a recovery well; the improvement comprising injecting through the injection well an effective amount of aqueous mixture which contains from about 0.5 to about 25 weight percent of a carbon dioxide saturated alkali metal hydrocarbon sulfonate waterflood additive; the hydrocarbon sulfonate waterflood additive having an average equivalent weight of from about 300 to about 600.
Claim 2
Dependent Claim
86 words
In a method for recovering hydrocarbons from a petroliferous formation which comprises injecting an aqueous fluid into the formation through an injection well and recovering displaced hydrocarbons from the formation through a recovery well; the improvement comprising injecting through the injection well an effective amount of aqueous mixture which contains from about 0.5 to about 25 weight percent of a carbon dioxide saturated alkali metal hydrocarbon sulfonate waterflood additive; the hydrocarbon sulfonate waterflood additive having an average equivalent weight of from about 300 to about 600.
Claim 3
Dependent Claim
47 words
The method of claim 1 wherein said hydrocarbon sulfonate waterflood additive is neutralized hydrocarbon sulfonate mixture comprising a water-soluble alkali metal hydrocarbon sulfonate and an oil-soluble alkali metal hydrocarbon sulfonate and said hydrocarbon sulfonate mixture has an average equivalent weight of from about 350 to about 500.
Claim 4
Dependent Claim
68 words
The method of claim 2 wherein the water-soluble hydrocarbon sulfonate has an average equivalent weight of about 200 to about 400, the oil-soluble hydrocarbon sulfonate has an average equivalent weight of about 400 to about 600, and the water-soluble hydrocarbon sulfonate and oil-soluble hydrocarbon sulfonate are present in a ratio such that the hydrocarbon sulfonate mixture has an average equivalent weight of from about 400 to about 450.
Claim 5
Dependent Claim
31 words
The method of claim 2 which includes the step of incorporating into said aqueous hydrocarbon sulfonate mixture from about 0.5 to about 25 percent by weight of a water-soluble solubilizing agent.
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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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |