US4061580A
Expired / Lapsed
US
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Thickened aqueous compositions for well treatment
Assignee: Lubrizol Corp
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Filing: 1976-09-08
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Granted: 1977-12-06
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Expires: 1996-09-08
Abstract
Abstract Thickened fracturing and acidizing fluids suitable for well treatment are prepared by adding certain amine salts to aqueous acid or salt solutions. The amines from which the amine salts are prepared are alkoxylated alkyl- or alkenylamines in which an alkyl or alkenyl group contains at least about 14 and preferably about 14-30 carbon atoms. Most often the alkyl or alkenyl group is oleyl, stearyl, or a mixture of groups derived from such fats as tallow or soybean oil. The especially preferred amines are the "Ethomeens" which are ethoxylated fatty amines.
Inventors
- 👤 Richard William Jahnke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:12
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; E21B43/27; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/933
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
A thickened composition comprising a major amount of hydrochloric aqueous solution of an acid or a salt useful in well treatment and a minor thickening amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR2## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 2
Dependent Claim
88 words
A thickened composition comprising a major amount of hydrochloric aqueous solution of an acid or a salt useful in well treatment and a minor thickening amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR2## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 3
Dependent Claim
29 words
A composition according to claim 1 wherein R 1 is at least one fatty alkyl or alkenyl radical, and the total of x and y is 4 or less.
Claim 4
Dependent Claim
21 words
A composition according to claim 2 wherein R 1 is the oleyl radical and each of x and y is 1.
Claim 5
Dependent Claim
107 words
In a well fracturing method which comprises forcing an aqueous salt solution down the bore of an oil well under sufficient pressure to fracture the rock formations surrounding said well bore, the improvement which comprises thickening said salt solution by incorporating therein a minor amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR3## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 6
Dependent Claim
107 words
In a well fracturing method which comprises forcing an aqueous salt solution down the bore of an oil well under sufficient pressure to fracture the rock formations surrounding said well bore, the improvement which comprises thickening said salt solution by incorporating therein a minor amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR3## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 7
Dependent Claim
29 words
A method according to claim 4 wherein R 1 is at least one fatty alkyl or alkenyl radical, and the total of x and y is 4 or less.
Claim 8
Dependent Claim
19 words
A method according to claim 5 wherein the salt solution is a solution of sodium chloride and calcium chloride.
Claim 9
Dependent Claim
21 words
A method according to claim 6 wherein R 1 is the oleyl radical and each of x and y is 1.
Claim 10
Dependent Claim
117 words
In a well acidizing method which comprises forcing hydrochloric aqueous solution of an acid down the bore of an oil well, thus chemically etching the rock formations surrounding said well bore so as to permit oil to flow into the well, the improvement which comprises thickening said acid solution by incorporating therein a minor amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR4## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 11
Dependent Claim
117 words
In a well acidizing method which comprises forcing hydrochloric aqueous solution of an acid down the bore of an oil well, thus chemically etching the rock formations surrounding said well bore so as to permit oil to flow into the well, the improvement which comprises thickening said acid solution by incorporating therein a minor amount of a phosphate salt of at least one alkoxylated amine of the formula ##STR4## wherein R 1 is an alkyl or alkenyl radical having about 14-30 carbon atoms, each of R 2 and R 3 is an ethylene radical, and each of x and y is an integer of at least 1, the total of x and y being 6 or less.
Claim 12
Dependent Claim
29 words
A method according to claim 8 wherein R 1 is at least one fatty alkyl or alkenyl radical, and the total of x and y is 4 or less.
Claim 13
Dependent Claim
21 words
A method according to claim 9 wherein R 1 is the oleyl radical and each of x and y is 1.
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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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |