US3659650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery process
Assignee: Phillips Petroleum Co
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Filing: 1970-06-15
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Granted: 1972-05-02
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Expires: 1990-06-15
Abstract
Abstract An oil recovery process which employs, as an additive to the aqueous material used for waterflooding, at least one of the reaction product of sulfamic acid and a polyethoxy alcohol or, the ammonium sulfate slat of a polyethoxylated alkylphenol is disclosed.
Inventors
- 👤 Charles A Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
The process as defined in claim 1 in which said agent is employed in an amount from about 0.01 to about 5 weight percent of said aqueous slug.
Claim 2
Dependent Claim
24 words
The process as defined in claim 1 in which aqueous slug is employed in an amount from about 0.01 to about 2 pore volumes.
Claim 3
Dependent Claim
14 words
The process as defined in claim 1 in which said aqueous slug comprises brine.
Claim 4
Dependent Claim
31 words
A process for producing oil from an oil-bearing stratum which comprises injecting into the stratum an aqueous slug containing an effective amount of a surface active-viscosifier additive agent having the formula:
Claim 5
Dependent Claim
28 words
The process as defined in claim 5 in which said agent is employed in an amount from about 0.01 to about 5 weight percent of said aqueous slug.
Claim 6
Dependent Claim
24 words
The process as defined in claim 5 in which aqueous slug is employed in an amount from about 0.01 to about 2 pore volumes.
Claim 7
Dependent Claim
14 words
The process as defined in claim 5 in which said aqueous slug comprises brine.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |