Patent US5991816A successfully refreshed from Google Patents.
US3865735A
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Overbased branched chain aliphatic sulfonate waterflood additives
Assignee: ConocoPhillips Co
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Filing: 1973-01-19
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Granted: 1975-02-11
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Expires: 1993-01-19
Abstract
Abstract Overbased branched chain aliphatic sulfonates are prepared by adding an excess of a base component such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate to a sulfonate derived by sulfonating a branched chain alkene such as a propylene tetramer and neutralizing the sulfonic acid thus formed with the base component. The overbased sulfonate is injected into a petroliferous formation to improve a water flood operation. In one embodiment overbasing base component is injected as a slug subsequent to injection of the sulfonate.
Inventors
- 👤 Charles R Clark
- 👤 M Duane Gregory
- 👤 Delmar D Krehbiel
- 👤 Claud D Butler
- 👤 Carl D Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
AN ANIONIC WATERFLOOD ADDITIVE COMPRISING A SULFONATE DERIVED FROM A NON-LINEAR ALKENE HAVING ABOUT 7 TO TO ABOUT 18 CARBON ATOMS PLUS AN OVERBASING AMOUNT OF BASE COMPONENT, WHEREIN THE RATIO: WEIGHT OF EXCESS BASE COMPONENT/WEIGHT OF SULFONATE IS ABOUT 0.03 TO ABOUT 2.0, THE BASE COMPONENT BEING AN ALKALI METAL HYDROXIDE, AMMONIUM HYDROXIDE, OR AN ALKALI METAL CARBONATE.
Claim 2
Dependent Claim
59 words
AN ANIONIC WATERFLOOD ADDITIVE COMPRISING A SULFONATE DERIVED FROM A NON-LINEAR ALKENE HAVING ABOUT 7 TO TO ABOUT 18 CARBON ATOMS PLUS AN OVERBASING AMOUNT OF BASE COMPONENT, WHEREIN THE RATIO: WEIGHT OF EXCESS BASE COMPONENT/WEIGHT OF SULFONATE IS ABOUT 0.03 TO ABOUT 2.0, THE BASE COMPONENT BEING AN ALKALI METAL HYDROXIDE, AMMONIUM HYDROXIDE, OR AN ALKALI METAL CARBONATE.
Claim 3
Dependent Claim
28 words
The anionic water flood additive of claim 1 wherein the sulfonate is derived from a non-linear olefin polymer containing about 8 to about 14 carbon atoms per molecule.
Claim 4
Dependent Claim
29 words
The anionic water flood additive of claim 2 wherein the ratio is about 0.20 to about 1.0; and wherein the base component is NaOH, LiOH, KOH, Na2CO3, or Li2CO3.
Claim 5
Dependent Claim
49 words
The anionic water flood additive of claim 3 wherein the sulfonate is derived from a non-linear olefin polymer wherein the average carbon chain length of the polymer is about 9 to about 12 carbon atoms; and wherein the sulfonate is a sodium sulfonate and is overbased with sodium hydroxide.
References Cited (Backward Citations)
US2999812A
Cited
US3721707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |