US3782472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam injection of oil formations
Assignee: Baker Petrolite LLC
•
Filing: 1967-03-20
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Granted: 1974-01-01
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Expires: 1987-03-20
Abstract
Abstract In the process of stimulating the production of petroleum from underground formations by treating the formation with steam, including steam flooding and the ''''huff and puff'''' steam soak techniques, the improvement which is characterized by the use of demulsifiers in conjunction with steam.
Inventors
- 👤 C Siess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:06
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; C; C09; C09K; C09K8/00; C09K8/58; C09K8/592; C09K8/60; C09K8/602
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
3 words
oxyalkylated hydroxyalkyl amino-alkanes,
Claim 2
Dependent Claim
13 words
The process of claim 1 where the demulsifier is an oxyalkylated hydroxyalkyl aminoalkane.
Claim 3
Dependent Claim
14 words
The process of claim 2 where the demulsifier is an oxyalkylated tris (hydroxyalkyl) aminoalkane.
Claim 4
Dependent Claim
5 words
oxyalkylated polyamines of the formula
Claim 5
Dependent Claim
5 words
oxyalkylated polyamines of the formula
Claim 6
Dependent Claim
13 words
The process of claim 3 where the demulsifier is an oxyalkylated tris aminomethane.
Claim 7
Dependent Claim
26 words
The proces of claim 4 where the tris (hydroxymethyl) aminomethane is oxyalkylated with ethylene oxide, propylene oxide, or a mixture of ethylene oxide and propylene oxide.
Claim 8
Dependent Claim
2 words
oxyalkylated ethylene-bisoxypropylamine,
Claim 9
Dependent Claim
3 words
oxyalkylated N-dodecyl triethylenetetramine,
Claim 10
Dependent Claim
21 words
The process of claim 5 where the tris (hydroxymethyl) aminomethane is oxyalkylated with a mixture of ethylene oxide and propylene oxide.
Claim 11
Dependent Claim
21 words
The process of claim 6 where the mole ratio of tris (hydroxymethyl) aminomethane to ethylene oxide to propylene oxide is 1:5:30.
Claim 12
Dependent Claim
3 words
oxyalkylated N-decyl butylenediamine,
Claim 13
Dependent Claim
2 words
amino amides,
Claim 14
Dependent Claim
21 words
The process of claim 6 where the mole ratio of tris (hydroxymethyl) aminomethane to ethylene oxide to propylene oxide is 1:35:75.
Claim 15
Dependent Claim
21 words
The process of claim 6 where the mole ratio of tris (hydroxymethyl) aminomethane to ethylene oxide to propylene oxide is 1:2:10.
Claim 16
Dependent Claim
9 words
oxyalkylated polymerized alkanolamines, and (10) oxyalkylated amine-modified phenolaldehyde resins.
Claim 17
Dependent Claim
37 words
The process of claim 4 where the tris (hydroxymethyl) aminomethane is oxyalkylated with a mixture of ethylene oxide and butylene oxide, the mole ratio of the tris (hydroxymethyl) aminomethane to ethylene oxide to butylene oxide being 1:4:8.
Claim 18
Dependent Claim
15 words
The process of claim 5 where the demulsifier is an oxyalkylated polyamine of the formula
Claim 19
Dependent Claim
13 words
The process of claim 1 where the demulsifier is an oxyalkylated polymerized alkanolamine.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |