US3768559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery process utilizing superheated gaseous mixtures
Assignee: Texaco Inc
•
Filing: 1972-06-30
•
Granted: 1973-10-30
•
Expires: 1992-06-30
Abstract
Abstract A secondary recovery process in which a superheated steamhydrocarbon vapor mixture is injected into an oil-bearing formation and oil is recovered from a producing well located a substantial distance from the injection well.
Inventors
- 👤 J Allen
- 👤 T Teasdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:01
CPC Classifications
E; E21; E21B; E21B36/00; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The method as defined in claim 1 wherein said oil is recovered from a producing well located a substantial distance from said injection well.
Claim 2
Dependent Claim
29 words
The method according to claim 1 wherein said oil is produced from said formation by terminating said injection step and withdrawing oil from said reservoir via the injection well.
Claim 3
Dependent Claim
39 words
The method according to claim 1 wherein said hydrocarbon-water phase is prepared by heating a mixture of the light hydrocarbon and to a temperature of at least 500* F and under a pressure of about 700 to 2,500 psig.
Claim 4
Dependent Claim
55 words
The method according to claim 1 wherein the said mixture of light hydrocarbon and feed water is brought to the elevated temperature condition in step (a) by continuously heating the light hydrocarbon stream and by bringing the feed water stream into direct contact with the hot light hydrocarbon, such that the boiler scaling is obviated.
Claim 5
Dependent Claim
13 words
The method according to claim 1 wherein the said hydrocarbon employed is heptane.
References Cited (Backward Citations)
US2862558A
Cited
US3150716A
Cited
US3193009A
Cited
US3360044A
Cited
US3350299A
Cited
US3350300A
Cited
US3685581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |