Patent US3583486A successfully refreshed from Google Patents.
US3583486A
Expired / Lapsed
US
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Oil recovery process using ethoxylated phenol-formaldehyde product
Assignee: Phillips Petroleum Co
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Filing: 1969-09-17
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Granted: 1971-06-08
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Expires: 1989-09-17
Abstract
Abstract An improved method for waterflooding a subterranean oil-bearing reservoir wherein the injected flood water contains an additive having both surface active and viscosifying properties. Said additive is an ethoxylated condensation product of a phenol and formaldehyde.
Inventors
- 👤 Charles A Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:36
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; C09K23/00; C09K23/42; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
driving said slug of step (1) through said stratum away from said well so as to displace oil from said stratum; and
Claim 2
Dependent Claim
52 words
A process according to claim 1 wherein the amount of said additive contained in said slug is an amount sufficient to accomplish at least one of (a) a decrease in the interfacial tension of the stratum oil and said aqueous slug and (b) an increase in the viscosity of said aqueous slug.
Claim 3
Dependent Claim
30 words
A process according to claim 2 wherein in step (2) the slug of step (1) is driven through said stratum with a fluid driving medium injected subsequent to said slug.
Claim 4
Dependent Claim
10 words
producing the displaced oil from a well penetrating said stratum.
Claim 5
Dependent Claim
13 words
A process according to claim 3 wherein said fluid driving medium is water.
Claim 6
Dependent Claim
57 words
A process according to claim 2 wherein: said stratum is also penetrated by at least one production well; the slug in step (2) is driven through said stratum toward said production well so as to displace oil and move same into said production well; and said displaced oil of step (3) is produced from said production well.
Claim 7
Dependent Claim
34 words
A process according to claim 5 wherein in step (2) the slug of step (1) is driven through said stratum toward said production well with a fluid driving medium injected subsequent to said slug.
Claim 8
Dependent Claim
13 words
A process according to claim 6 wherein said fluid driving medium is water.
Claim 9
Dependent Claim
49 words
A process according to claim 1 wherein: said additive is present in said aqueous slug in a concentration within the range of from 0.01 to 5 weight percent; and said slug is introduced into said stratum in an amount within the range of from 0.01 to 2 pore volume.
Claim 10
Dependent Claim
32 words
A process according to claim 8 wherein: the value of m in said formula is from 5 to 15: and the value of n in said formula is from 10 to 20.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |