Patent US3705627A successfully refreshed from Google Patents.
US3705627A
Expired / Lapsed
US
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Inhibition of saline water intrusion into fresh water aquifers
Assignee: Marathon Oil Co
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Filing: 1971-02-01
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Granted: 1972-12-12
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Expires: 1991-02-01
Abstract
Abstract Solutions of soluble compounds, e.g., aqueous alkaline solutions of substituted isocyanuric acids, are injected into an intruding front of saline water to form an insoluble precipitate, thus decreasing formation permeability and reducing or eliminating contamination of fresh water aquifers by saline water.
Inventors
- 👤 Perry A Argabright
- 👤 Jack L Hummel
- 👤 C T Presley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:05
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5086
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
The process of claim 1 wherein the aqueous solution comprises isocyanurate derivatives having the structure;
Claim 2
Dependent Claim
19 words
The process of claim 1 wherein the source of said saline water is located above said fresh water aquifer.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the aqueous solution has a pH in the range of from about 8 to about 15.
Claim 4
Dependent Claim
80 words
In a process for preventing the advance of saline waters into a fresh water aquifer, the improvement comprising injecting between at least a portion of said aquifer and at least a portion of said saline water an aqueous solution of compounds which precipitate over a pH dependent time period to form a mass of solid precipitate which blocks intrusion of saline water into said aquifer, and adjusting the pH of said aqueous solution to control the time of said precipitation.
Claim 5
Dependent Claim
16 words
The process of claim 5 wherein the aqueous solution comprises an isocyanuric acid or its derivatives.
Claim 6
Dependent Claim
15 words
The process of claim 5 wherein the aqueous solution comprises isocyanurate derivatives having the structure:
Claim 7
Dependent Claim
22 words
The process of claim 7 wherein the aqueous solution has a pH in the range of from about 8 to about 15.
Claim 8
Dependent Claim
77 words
A process for alleviating saline water invasion into fresh water aquifers, said process comprising injecting an aqueous solution of compounds which precipitate over a pH dependent time period at a controlled rate to form a relatively impermeable mass substantially insoluble in water, and adjusting the pH of said aqueous solution to control the time of said precipitation, said injection being so directed as to locate said mass in a position to block saline intrusion of said aquifer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |