US3898165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions for fracturing high temperature well formations
Assignee: Halliburton Co
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Filing: 1973-06-11
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Granted: 1975-08-05
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Expires: 1993-06-11
Abstract
Abstract This invention provides a fracturing fluid having a high viscosity at temperatures above 200*F comprising an aqueous fluid having a pH of less than 7, a water soluble alcohol and a crosslinked polysaccharide.
Inventors
- 👤 John W Ely
- 👤 Jiten Chatterji
- 👤 Marlin D Holtmyer
- 👤 John M Tinsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/66; C09K8/68; C09K8/92; Y; Y10; Y10S; Y10S507/00; Y10S507/902; Y10S507/922
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
163 words
AN AQUEOUS FLUID HAVING A PH OF LESS THAN ABOUT 7 AND HAVING IMPROVED RESISTANCE TO VISCOSITY DEGRADATION AT TEMPERATURES OF UP TO ABOUT 400*F, SAID FLUID CONSISTING ESSENTIALLYOF: WATER, A RETARDED GELLING AGENT PRESENT IN SAID FLUID IN THE RANGE OF FROM ABOUT 10 TO ABOUT 300 POUNDS PER 1,000 GALLONS OF SAID WATER, AND A BASE PRESENT IN SAID FLUID IN THE RANGE OF FROM ABOUT 5 TO ABOUT 50 POUNDS PER 1,000 GALLONS OF SAID WATER, WHEREIN SAID RETARDED GELLING AGENT IS THE PRODUCT OF THE REACTION OF BETWEEN ABOUT 0.05 TO ABOUT 100 PARTS BY WEIGHT OF A HEREINAFTER DESCRIBED COMPOUND AND ABOUT 100 PARTS BY WEIGHT OF A HYDRATABLE POLYSACCHARIDE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 100,000 SELECTED FROM THE GROUP CONSISTING OF GUMS, CELLULOSE ETHERS AND MIXTURES THEREOF, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXYADIPALDEHYDE, DIMETHYLOL UREA, WATER SOLUBLE UREA FORMALDEHYDE RESINS, WATER SOLUBLE MELAMINE FORMALDEHYDE RESIN, DIALDEHYDES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
163 words
AN AQUEOUS FLUID HAVING A PH OF LESS THAN ABOUT 7 AND HAVING IMPROVED RESISTANCE TO VISCOSITY DEGRADATION AT TEMPERATURES OF UP TO ABOUT 400*F, SAID FLUID CONSISTING ESSENTIALLYOF: WATER, A RETARDED GELLING AGENT PRESENT IN SAID FLUID IN THE RANGE OF FROM ABOUT 10 TO ABOUT 300 POUNDS PER 1,000 GALLONS OF SAID WATER, AND A BASE PRESENT IN SAID FLUID IN THE RANGE OF FROM ABOUT 5 TO ABOUT 50 POUNDS PER 1,000 GALLONS OF SAID WATER, WHEREIN SAID RETARDED GELLING AGENT IS THE PRODUCT OF THE REACTION OF BETWEEN ABOUT 0.05 TO ABOUT 100 PARTS BY WEIGHT OF A HEREINAFTER DESCRIBED COMPOUND AND ABOUT 100 PARTS BY WEIGHT OF A HYDRATABLE POLYSACCHARIDE HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 100,000 SELECTED FROM THE GROUP CONSISTING OF GUMS, CELLULOSE ETHERS AND MIXTURES THEREOF, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF 2-HYDROXYADIPALDEHYDE, DIMETHYLOL UREA, WATER SOLUBLE UREA FORMALDEHYDE RESINS, WATER SOLUBLE MELAMINE FORMALDEHYDE RESIN, DIALDEHYDES HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
63 words
The aqueous fluid of claim 1 further consisting of an alcohol having the general formula: CnH(2n 1)OH, wherein n is an integer within the range of 1 to about 5 and mixtures thereof, wherein the concentration of said alcohol in said fluid is in the range of about 1 to 10 parts by volume alcohol per 100 parts by volume of said water.
Claim 4
Dependent Claim
46 words
The aqueous fluid of claim 2 further consisting of a gelling agent selected from the group consisting of a hydratable polysaccharide having a molecular weight of at least about 100, 000; a hydratable polyacrylamide having a molecular weight of at least about 30,000 and mixtures thereof.
Claim 5
Dependent Claim
47 words
The aqueous fluid of claim 3 wherein said hydratable polysaccharide utilized in said retarded gelling agent is selected from the group consisting of galactomannan gums, glucomannan gums, cellulose ethers, and mixtures thereof, said cellulose ethers being selected from the group consisting of hydroxyethyl cellulose, carboxymethylcellulose, and carboxymethylhydroxyethylcellulose.
Claim 6
Dependent Claim
16 words
The aqueous fluid of claim 4 wherein said gelling agent in one of said hydratable polysaccharides.
Claim 7
Dependent Claim
21 words
The aqueous fluid of claim 5 wherein sAid retarded gelling agent is the reaction product of said polysaccharide and said dialdehyde.
Claim 8
Dependent Claim
15 words
The aqueous fluid of claim 6 wherein said polysaccharide is one of said cellulose ethers.
Claim 9
Dependent Claim
33 words
The aqueous fluid of claim 7 wherein said cellulose ether is hydroxyethylcellulose having an ethylene oxide substitution within the range of about 1 to about 10 moles of ethylene oxide per anhydroglucose unit.
Claim 10
Dependent Claim
19 words
The aqueous fluid of claim 8 wherein said pH is within the range of about 3 to about 4.
Claim 11
Dependent Claim
23 words
The aqueous fluid of claim 9 wherein said encapsulating material is selected from the group consisting of hydratable methylcellulose, paraffin and mixtures thereof.
Claim 12
Dependent Claim
16 words
The aqueous fluid of claim 10 wherein said base is selected from sodium bicarbonate and borax.
Claim 13
Dependent Claim
17 words
The aqueous fluid of claim 11 wherein said dialdehyde is selected from one of glyoxal and glutardialdehyde.
Claim 14
Dependent Claim
30 words
The aqueous fluid of claim 12 wherein said hydroxyethylcellulose has an ethylene oxide substitution within the range of about 1.3 to about 3 moles of ethylene oxide per anhydroglucose unit.
Claim 15
Dependent Claim
22 words
The aqueous fluid of claim 13 wherein the ''''n'''' value of said alcohol is in the range of 1 to about 3.
Claim 16
Dependent Claim
33 words
The aqueous fluid of claim 14 wherein said gelling agent is hydroxyethylcellulose having an ethylene oxide substitution within the range of about 1.3 to about 3 moles of ethylene oxide per anhydrogluclose unit.
References Cited (Backward Citations)
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US3634237A
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |