Patent US4681634A successfully refreshed from Google Patents.
US4681634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition cimentaire hydraulique a prise retardee pour cimentation a hautes temperature et pression
Assignee: Total Compagnie Francaise des Petroles SA
•
Filing: 1985-10-16
•
Granted: 1987-07-21
•
Expires: 2005-10-16
Abstract
Abstract Hydraulic cement composition with delayed setting, intended to be employed in an environment which may be under extreme temperature, pressure and salinity conditions, the composition being characterized in that it incorporates (a) a saline or nonsaline aqueous liquid phase, (b) at least one hydraulic cement, (c) a setting-retarder adjuvant preserving and/or improving the rheological properties, a water-soluble copolymer resulting from the copolymerization of ethylenic acids, acrylamides and ethylenic esters of phosphoric acid.
Inventors
- 👤 Yves Roca
- 👤 Jacky Rousset
- 👤 Pierre Bouchut
- 👤 Marie-Christine Leblanc
- 👤 Daniel Baffreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:44
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/003; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
117 words
A hydraulic cement composition, comprising: (a) an aqueous liquid phase, (b) at least one hydraulic cement, (c) a setting-retarder adjuvant preserving or improving rheological properties, comprising a water-soluble polymer obtained from the copolymerization of CH 2 ═CR 1 --COOH or maleic anhydride with CH 2 ═CR 2 --CONHR 6 and CH 2 ═CR 4 --COO--R 3 --OPO 3 H 2 , wherein R 1 , R 2 and R 4 are each independently chosen from the group consisting of hydrogen and C 1 -C 18 -alkyls, R 3 is chosen from the group consisting of alkylenes, alkylene oxides and polyalkylene oxides, and R 6 is chosen from the group consisting of hydrogen, alkyls and alkyl sulfonic acids.
Claim 2
Dependent Claim
117 words
A hydraulic cement composition, comprising: (a) an aqueous liquid phase, (b) at least one hydraulic cement, (c) a setting-retarder adjuvant preserving or improving rheological properties, comprising a water-soluble polymer obtained from the copolymerization of CH 2 ═CR 1 --COOH or maleic anhydride with CH 2 ═CR 2 --CONHR 6 and CH 2 ═CR 4 --COO--R 3 --OPO 3 H 2 , wherein R 1 , R 2 and R 4 are each independently chosen from the group consisting of hydrogen and C 1 -C 18 -alkyls, R 3 is chosen from the group consisting of alkylenes, alkylene oxides and polyalkylene oxides, and R 6 is chosen from the group consisting of hydrogen, alkyls and alkyl sulfonic acids.
Claim 3
Dependent Claim
15 words
The hydraulic cement composition of claim 1, wherein the said aqueous liquid phase is saline.
Claim 4
Dependent Claim
15 words
The hydraulic cement composition of claim 1, wherein the said aqueous liquid phase is non-saline.
Claim 5
Dependent Claim
74 words
The hydraulic cement composition of claim 1, wherein R 3 is a group --(CH 2 ) q -- in which q is from 1 to 18, or R 3 is a group --(R 5 --O) r -- wherein R 5 is a C 1 -C 4 -alkylene and r is from 1 to 30, or R 3 is a combination of the groups --(R 5 --O) r -- and --(CH 2 ) q --.
Claim 6
Dependent Claim
13 words
The hydraulic cement composition of claim 4, wherein q is 2 to 4.
Claim 7
Dependent Claim
13 words
The hydraulic cement composition of claim 5, wherein r is 1 to 10.
Claim 8
Dependent Claim
26 words
The hydraulic cement composition of claim 1, wherein R 6 is a hydrogen atom, an alkyl group or a C 1 -C 18 -alkyl sulfonic acid.
Claim 9
Dependent Claim
73 words
The hydraulic cement composition of claim 1, wherein the said water-soluble polymer contains between 0 to 90% of CH 2 ═CR 1 --COOH or maleic anhydride, between 0 to 90% of CH 2 ═CR 2 --CONHR 6 , and from 2 to 60% of CH 2 ═CR 4 --COO--R 3 --OPO 3 H 2 , wherein the percentage values are expressed in percent by weight based on the composition of the said polymer.
Claim 10
Dependent Claim
40 words
The hydraulic cement composition of claim 1, wherein CH 2 ═CR 1 --COOH is acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, aconitic acid, fumaric acid, mesaconic acid, sinapic acid, undecylenic acid, angelic acid, or a hydroxy-acrylic acid.
Claim 11
Dependent Claim
21 words
The hydraulic cement composition of claim 1, wherein CH 2 ═CR 2 --CONHR 6 is acrylamide, methacrylamide, or an acrylamidoalkylsulphonic acid.
Claim 12
Dependent Claim
18 words
The hydraulic cement composition of claim 10, wherein CH 2 ═CR 2 --CONHR 6 is 2-acrylamido-2-methylpropane sulfonic acid.
Claim 13
Dependent Claim
55 words
The hydraulic cement composition of claim 1, wherein CH 2 ═CR 4 --COO--R 3 OPO 3 H 2 is obtained (i) by reacting P 2 O 5 with an ethylenic alcohol, (ii) by reacting phosphoric acid with an ethylenic alcohol, or (iii) by reacting P 2 O 5 and phosphoric acid with an ethylenic alcohol.
Claim 14
Dependent Claim
46 words
The hydraulic cement composition of claim 3, wherein the said ethylenic alcohol is at least one member selected from the group consisting of methacrylates of ethylene glycol, acrylates of ethylene glycol, methacrylates of propylene glycol, acrylates of propylene glycol, methacrylates of polyglycols and acrylates of polyglycols.
Claim 15
Dependent Claim
20 words
The hydraulic cement composition of claim 1, wherein R 1 , R 2 or R 4 is a hydrogen atom.
Claim 16
Dependent Claim
24 words
The hydraulic cement composition of claim 1, wherein R 1 , R 2 or R 4 is a C 1 -C 18 -alkyl group.
Claim 17
Dependent Claim
38 words
The hydraulic cement composition of claim 1, wherein the water-soluble polymer is obtained from the copolymerization of maleic anhydride with CH 2 ═CR 2 --CONHR 6 and CH 2 ═CR 4 --COO--R 3 --OPO 3 H 2 .
References Cited (Backward Citations)
US2848340A
Cited
DE1471153A1
Cited
US3856541A
Cited
CA970398A
Cited
US4059552A
Cited
US4054460A
Cited
GB2031397A
Cited
US4500357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |