Patent US3847638A successfully refreshed from Google Patents.
US3847638A
Expired / Lapsed
US
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Hydrated metal oxide deposition
Assignee: Shell USA Inc
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Filing: 1973-02-12
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Granted: 1974-11-12
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Expires: 1993-02-12
Abstract
Abstract A treating liquid for depositing a hydrated metal oxide comprises a basic aqueous solution of an oxide of an amphoteric metal and a pH reducing reactant that subsequently lowers the pH of the solution to one at which a hydrated oxide of the amphoteric metal is precipitated. The treating liquid can provide a single step process for consolidating or plugging a sand and/or can comprise a sand consolidating or plugging component of a drilling, fracturing, perforating, oil-displacing, or the like, type of fluid.
Inventors
- 👤 G Suman
- 👤 E Richardson
- 👤 R Scheuerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:50
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/5045; C09K8/60; C09K8/62; C09K8/66; C09K8/665; E; E21; E21B; E21B21/00; E21B21/003; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A TREATING LIQUID-FORMING ADDITIVE FOR FORMING A HYDRATED METAL OXIDE-DEPOSITING TREATING LIQUID WHEN MIXED WITH WATER COMPRISING: AT LEAST ON AMPHOTERIC METAL OR AMPHOTERIC MERAL COMPOUND THAT IS CAPABLE OF INTERACTING WITH A BASIC AQUEOUS LIQUID TO FORM AN AQUEOUS SOLUTION OF A HYDROXY COMPLEX OF THE AMPHOTERIC METAL FROM WHICH SOLUTION A HYDRATED METAL OXIDE CAN BE PRECIPITATED; AT LEAST ONE BASIC COMPOUND THAT IS CAPABLE OF INCREASING THE PH OF AN AQUEOUS LIQUID TO A PH AT WHICH THE SOLUTION OF SAID HYDROXY COMPLEX IS FORMED; AND AT LEAST ONE PH REDUCING REACTIVE COMPOUND THAT IS CAPABLE OF DISSOLVING IN THE BASIC AQUEOUS SOLUTION OF SAID HYDROXY COMPLEX AND SUBSEQUENTLY REDUCING THE PH OF THE SOLUTION TO ONE AT WHICH A HYDRATED METAL OXIDE OF THE AMPHOTERIC METAL IS PRECIPITATED.
Claim 2
Dependent Claim
132 words
A TREATING LIQUID-FORMING ADDITIVE FOR FORMING A HYDRATED METAL OXIDE-DEPOSITING TREATING LIQUID WHEN MIXED WITH WATER COMPRISING: AT LEAST ON AMPHOTERIC METAL OR AMPHOTERIC MERAL COMPOUND THAT IS CAPABLE OF INTERACTING WITH A BASIC AQUEOUS LIQUID TO FORM AN AQUEOUS SOLUTION OF A HYDROXY COMPLEX OF THE AMPHOTERIC METAL FROM WHICH SOLUTION A HYDRATED METAL OXIDE CAN BE PRECIPITATED; AT LEAST ONE BASIC COMPOUND THAT IS CAPABLE OF INCREASING THE PH OF AN AQUEOUS LIQUID TO A PH AT WHICH THE SOLUTION OF SAID HYDROXY COMPLEX IS FORMED; AND AT LEAST ONE PH REDUCING REACTIVE COMPOUND THAT IS CAPABLE OF DISSOLVING IN THE BASIC AQUEOUS SOLUTION OF SAID HYDROXY COMPLEX AND SUBSEQUENTLY REDUCING THE PH OF THE SOLUTION TO ONE AT WHICH A HYDRATED METAL OXIDE OF THE AMPHOTERIC METAL IS PRECIPITATED.
Claim 3
Dependent Claim
38 words
The treating liquid-forming additive of claim 1 in which: said amphoteric metal is aluminum; said basic material is an alkali metal hydroxide; and said pH reducing reactant material is an amide or ester of a water soluble acid.
Claim 4
Dependent Claim
58 words
A treating liquid from which a hydrated metal oxide is subsequently deposited, comprising, a basic aqueous solution of an amphoteric metal oxide from which solution a hydrated metal oxide can be precipitated and at least one pH reducing reactive compound that subsequently lowers the pH of the solution to one at which a hydrated metal oxide is precipitated.
Claim 5
Dependent Claim
58 words
A treating liquid from which a hydrated metal oxide is subsequently deposited, comprising, a basic aqueous solution of an amphoteric metal oxide from which solution a hydrated metal oxide can be precipitated and at least one pH reducing reactive compound that subsequently lowers the pH of the solution to one at which a hydrated metal oxide is precipitated.
Claim 6
Dependent Claim
25 words
The treating liquid of claim 3 in which the amphoteric metal oxide is an amphoteric metal oxide of an acid soluble and base soluble metal.
Claim 7
Dependent Claim
23 words
The treating liquid of claim 3 in which the pH reducing reactant material is an ester or amide of a water soluble acid.
Claim 8
Dependent Claim
22 words
The treating liquid of claim 3 in which the solution of the amphoteric metal oxide is a solution of an aluminum oxide.
Claim 9
Dependent Claim
22 words
The treating liquid of claim 6 in which the pH reducing reactant is an amide or ester of a water soluble acid.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |