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US3936408A
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Well cementing composition having improved flow properties containing a polyamido-sulfonic additive
Assignee: Calgon Corp
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Filing: 1974-05-01
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Granted: 1976-02-03
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Expires: 1994-05-01
Abstract
Abstract Aqueous hydraulic cement compositions containing polyamido-sulfonic compounds as flow-property-improving and turbulence-inducing additives and their use in cementing wells is disclosed.
Inventors
- 👤 Sally L. Adams
- 👤 Michael M. Cook
- 👤 Fred David Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:12
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C04; C04B; C04B24/00; C04B24/16; C08; C08K; C08K3/00; C08K3/01; C08K3/013
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
36 words
A cementing composition comprising hydraulic cement in admixture with from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement, of a polyamido-sulfonic compound recurring units represented by the following formula: ##EQU6##
Claim 2
Dependent Claim
36 words
A cementing composition comprising hydraulic cement in admixture with from about 0.01 to about 5.0 percent by weight, based on weight of hydraulic cement, of a polyamido-sulfonic compound recurring units represented by the following formula: ##EQU6##
Claim 3
Dependent Claim
111 words
wherein R 1 is hydrogen or methyl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of hydrogen, phenyl, straight or branched alkyl of from one to twelve carbon atoms, and cycloalkyl of up to six carbon atoms; R 6 is straight or branched alkyl of from one to twelve carbon atoms, cycloalkyl of up to six carbon atoms, phenyl, or is absent; A is hydrogen, alkali metal ion or ammonium; and n is an integer of from 2 to about 100, such that the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 10,000.
Claim 4
Dependent Claim
111 words
wherein R 1 is hydrogen or methyl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of hydrogen, phenyl, straight or branched alkyl of from one to twelve carbon atoms, and cycloalkyl of up to six carbon atoms; R 6 is straight or branched alkyl of from one to twelve carbon atoms, cycloalkyl of up to six carbon atoms, phenyl, or is absent; A is hydrogen, alkali metal ion or ammonium; and n is an integer of from 2 to about 100, such that the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 10,000.
Claim 5
Dependent Claim
22 words
The composition of claim 1 wherein the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 1,500.
Claim 6
Dependent Claim
35 words
The composition of claim 1 wherein the said polyamido-sulfonic compound is admixed with the hydraulic cement in an amount of from about 0.1 to about 2.0 percent by weight, based on weight of hydraulic cement.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein the polyamido-sulfonic compound is poly-(2-acrylamido-2-methylpropane-sulfonic acid) comprising recurring units of the following formula: ##EQU7##
Claim 8
Dependent Claim
55 words
An aqueous hydraulic cement slurry composition having improved flow properties and being more readily induced to flow in turbulence, comprising dry hydraulic cement in admixture with from about 0.01 to about 5.0 percent by weight, based on weight of dry hydraulic cement, of a polyamido-sulfonic compound having recurring units represented by the following formula: ##EQU8##
Claim 9
Dependent Claim
55 words
An aqueous hydraulic cement slurry composition having improved flow properties and being more readily induced to flow in turbulence, comprising dry hydraulic cement in admixture with from about 0.01 to about 5.0 percent by weight, based on weight of dry hydraulic cement, of a polyamido-sulfonic compound having recurring units represented by the following formula: ##EQU8##
Claim 10
Dependent Claim
128 words
wherein R 1 is hydrogen or methyl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of hydrogen, phenyl, straight or branched alkyl of from one to twelve carbon atoms, and cycloalkyl of up to six carbon atoms; R 6 is straight or branched alkyl of one to twelve carbon atoms, cycloalkyl of up to six carbon atoms, phenyl, or is absent; A is hydrogen, alkali metal ion or ammonium; and n is an integer of from 2 to about 100, such that the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 10,000; and sufficient water to make a pumpable slurry which is capable of setting to form a monolithic solid.
Claim 11
Dependent Claim
128 words
wherein R 1 is hydrogen or methyl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of hydrogen, phenyl, straight or branched alkyl of from one to twelve carbon atoms, and cycloalkyl of up to six carbon atoms; R 6 is straight or branched alkyl of one to twelve carbon atoms, cycloalkyl of up to six carbon atoms, phenyl, or is absent; A is hydrogen, alkali metal ion or ammonium; and n is an integer of from 2 to about 100, such that the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 10,000; and sufficient water to make a pumpable slurry which is capable of setting to form a monolithic solid.
Claim 12
Dependent Claim
22 words
The composition of claim 5 wherein the weight average molecular weight of the polyamido-sulfonic compound is from about 200 to about 1,500.
Claim 13
Dependent Claim
36 words
The composition of claim 5 wherein the said polyamido-sulfonic compound is admixed with the hydraulic cement in an amount of from about 0.1 to about 2.0 percent by weight, based on weight of dry hydraulic cement.
Claim 14
Dependent Claim
30 words
The composition of claim 5 wherein the water is present in an amount of from about 25 to about 60 percent by weight, based on weight of dry hydraulic cement.
Claim 15
Dependent Claim
20 words
The composition of claim 5 wherein the polyamido-sulfonic compound is poly-(2-acrylamido-2-methylpropane-1-sulfonic acid) comprising recurring units of the following formula: ##EQU9##
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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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |