Patent US4071458A successfully refreshed from Google Patents.
US4071458A
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Oil displacement fluid containing a solubilizing agent
Assignee: Texaco Inc
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Filing: 1976-09-17
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Granted: 1978-01-31
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Expires: 1996-09-17
Abstract
Abstract Petroleum may be recovered from viscous petroleum containing formations including tar sand deposits by first creating a fluid communication path in the formation, followed by injecting via an injection well an aromatic solvent such as benzene, saturated with carbon dioxide at the injection pressure into the fluid communication path, following the injection of the solvent with the injection of an oil-displacing fluid such as hot water, steam, or superheated steam and recovering oil from the formation via a production well. The oil displacing fluid may contain a solubilizing agent such as an oxyethylated nitrogen containing compound.
Inventors
- 👤 Joseph C. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:00
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/592; C09K8/584; E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An oil-displacement fluid which comprises a material selected from the group consisting of water, steam and superheated steam together with a minor amount of a solubilizing agent of the formula: ##STR5## wherein r is an integer of from about 5 to about 50; R" is selected from the group consisting of hydrogen and --SO 3 M wherein M is selected from the group consisting of hydrogen, sodium, potassium, and the ammonium ion and R'" is selected from the group consisting of hydrogen and --(CH 2 CH 2 O) r R" and with the proviso that when R" is hydrogen then R'" is --(CH 2 CH 2 O) r H; and wherein the said solubilizing agent is present in amount of from 0.001 to 0.05 weight percent.
Claim 2
Dependent Claim
126 words
An oil-displacement fluid which comprises a material selected from the group consisting of water, steam and superheated steam together with a minor amount of a solubilizing agent of the formula: ##STR5## wherein r is an integer of from about 5 to about 50; R" is selected from the group consisting of hydrogen and --SO 3 M wherein M is selected from the group consisting of hydrogen, sodium, potassium, and the ammonium ion and R'" is selected from the group consisting of hydrogen and --(CH 2 CH 2 O) r R" and with the proviso that when R" is hydrogen then R'" is --(CH 2 CH 2 O) r H; and wherein the said solubilizing agent is present in amount of from 0.001 to 0.05 weight percent.
Claim 3
Dependent Claim
27 words
The oil-displacement fluid of claim 1 wherein the said solubilizing agent has the formula: ##STR6## wherein r is an integer of from about 5 to about 50.
Claim 4
Dependent Claim
73 words
The oil-displacement fluid of claim 1 wherein the said solubilizing agent has the formula: ##STR7## wherein r is an integer of from about 5 to about 50, M is selected from the group consisting of hydrogen, sodium, potassium, and the ammonium ion and R'" is selected from the group consisting of hydrogen and --(CH 2 CH 2 O) r SO 3 M, wherein r and M have the same meaning as previously described.
Claim 5
Dependent Claim
24 words
The oil-displacement fluid of claim 1 wherein an alkaline agent selected from the group consisting of sodium hydroxide and sodium hypochlorite is included therein.
Claim 6
Dependent Claim
14 words
The oil-displacement fluid of claim 4 wherein the said alkaline agent is sodium hydroxide.
Claim 7
Dependent Claim
14 words
The oil-displacement fluid of claim 4 wherein the said alkaline agent is sodium hypochlorite.
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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |