US3731741A
Expired / Lapsed
US
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Secondary oil recovery process using oxyalkylated additives
Assignee: Texaco Inc
•
Filing: 1971-07-06
•
Granted: 1973-05-08
•
Expires: 1991-07-06
Abstract
Abstract A process for the recovery of hydrocarbon materials from a subterranean hydrocarbon-bearing formation by contacting the formation with an aqueous alkaline flooding medium containing a solubilizing agent.
Inventors
- 👤 H Palmer
- 👤 T Sample
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:45
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
35 words
The method of claim 1 wherein the said water-soluble oxyalkylated, nitrogen-containing aromatic compound contains from about 5 to about 50 oxyalkyl units and wherein the said aromatic compounD contains not more than 12 carbon atoms.
Claim 2
Dependent Claim
27 words
The method of claim 1 wherein the said water-soluble oxyalkylated, nitrogen-containing aromatic compound has the formula: R(OR'')mOH , wherein R is selected from the group consisting of:
Claim 3
Dependent Claim
9 words
The method of claim 3 wherein R'' is: -CH2-CH2-
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the said water-soluble, oxyalkylated nitrogen-containing aromatic compound is: and m is an integer of from about 5 to about 20.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein the said water-soluble, oxyalkylated, nitrogen-containing aromatic compound is: wherein m is an integer of from about 5 to about 20.
Claim 6
Dependent Claim
49 words
The method of claim 1 wherein the said aqueous alkaline flooding medium comprises an aqueous medium containing an alkaline agent selected from the group consisting of alkali metal hydroxides, alkaline earth metal hydroxides, basic salts of alkali metal hydroxides, basic salts of alkaline earth metal hydroxides and mixtures thereof.
Claim 7
Dependent Claim
12 words
The method of claim 7 wherein said alkaline agent is sodium hydroxide.
Claim 8
Dependent Claim
29 words
The method of claim 7 wherein the said alkaline agent is contained in the aqueous medium in amounts in the range of from about 0.001 to about 0.5 molar.
Claim 9
Dependent Claim
12 words
The method of claim 7 wherein the said aqueous medium is steam.
References Cited (Backward Citations)
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US3455386A
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Cited
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Cited
US3570602A
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |