US3701384A
Expired / Lapsed
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Method and composition for controlling flow through subterranean formations
Assignee: Dow Chemical Co
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Filing: 1971-03-11
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Granted: 1972-10-31
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Expires: 1991-03-11
Abstract
Abstract A slurry of finely divided inorganic solids, such as silica flour, magnesium oxide, or magnesium or calcium carbonates, silicates or hydroxides, is injected into a porous subterranean formation together with an aqueous composition consisting of a colloidal dispersion of a water-insoluble, inorganic compound formed in an aqueous solution of a high-molecular-weight organic polymeric polyelectrolyte to accomplish plugging of thief zones, fractures or other zones of excessive permeability.
Inventors
- 👤 Willis G Routson
- 👤 Albert L Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/40; C09K8/00; C09K8/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
The method of claim 1 wherein the finely divided solids are introduced intermittently during the injection of the colloidal dispersion.
Claim 2
Dependent Claim
14 words
The method of claim 1 wherein the finely divided solids consist of silica flour.
Claim 3
Dependent Claim
25 words
The method of claim 3 wherein the colloidal dispersion consists of colloidal chromic hydroxide formed in the presence of a water-soluble, high-molecular-weight, partially hydrolyzed polyacrylamide.
Claim 4
Dependent Claim
35 words
A method in accordance with claim 1 wherein the slurry of finely divided solids is introduced into the porous formation and the colloidal dispersion is thereafter introduced into said formation by the same injection means.
Claim 5
Dependent Claim
39 words
A method in accordance with claim 1 wherein the colloidal dispersion consists of a colloidal hydroxide of aluminum, chromium, cadmium, cobalt, nickel, copper, tin, iron or zinc formed in the presence of a water-soluble, high-molecular-weight polyacrylamide or hydrolyzed polyacrylamide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |