Patent US3856541A successfully refreshed from Google Patents.
US3856541A
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Hydraulic cement and method of cementing in environments having elevated temperatures
Assignee: Schlumberger Technology Corp
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Filing: 1972-09-08
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Granted: 1974-12-24
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Expires: 1992-09-08
Abstract
Abstract A mixture of component (1) water-soluble hydroxycarboxylic acid or salt thereof and component (2) boric acid or a water-soluble salt thereof when admixed with an aqueous hydraulic cement slurry increases the normal setting time of the cement slurry. A watersoluble boron containing hydroxy carboxylic acid or salt thereof can be substituted for the above defined mixture.
Inventors
- 👤 R Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:19
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/04; C04B24/06; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
IN THE METHOD OF EMPLACING AN AQUEOUS HYDRAULIC CEMENT SLURRY INTO AN ENVIRONMENT HAVING AN ELEVATED TEMPERATURE OF AT LEAST ABOUT 200*F WHICH TEMPERATURE WOULD NORMALLY CAUSE A PREMATURE SETTING OF THE HYDRAULIC CEMENT, THE IMPROVEMENT WHICH COMPRISES: ADMIXING WITH SAID HYDRAULIC CEMENT SLURRY A WATER SOLUBLE ALKALI OR ALKALINE EARTH METAL SALT OF A BORON CONTAINING HYDROXYCARBOXYLIC ACID IN AN AMOUNT RANGING FROM ABOUT 0.1 TO ABOUT 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF DRY CEMENT TO RETARD THE SETTING RATE OF SAID HYDRAULIC CEMENT SLURRY AT SAID ELEVATED TEMPERATURE.
Claim 2
Dependent Claim
94 words
IN THE METHOD OF EMPLACING AN AQUEOUS HYDRAULIC CEMENT SLURRY INTO AN ENVIRONMENT HAVING AN ELEVATED TEMPERATURE OF AT LEAST ABOUT 200*F WHICH TEMPERATURE WOULD NORMALLY CAUSE A PREMATURE SETTING OF THE HYDRAULIC CEMENT, THE IMPROVEMENT WHICH COMPRISES: ADMIXING WITH SAID HYDRAULIC CEMENT SLURRY A WATER SOLUBLE ALKALI OR ALKALINE EARTH METAL SALT OF A BORON CONTAINING HYDROXYCARBOXYLIC ACID IN AN AMOUNT RANGING FROM ABOUT 0.1 TO ABOUT 10 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF DRY CEMENT TO RETARD THE SETTING RATE OF SAID HYDRAULIC CEMENT SLURRY AT SAID ELEVATED TEMPERATURE.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the salt of the water soluble boron containing hydroxycarboxylic acid is an alkali metal salt.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the salt of the water soluble boron containing hydroxycarboxylic acid is an alkaline earth metal salt.
Claim 5
Dependent Claim
67 words
A hydraulic cement composition comprising: a. a hydraulic cement slurry, and b. about 0.1 to about 10 parts by weight of an alkali or alkaline earth metal salt of a boron containing hydroxycarboxylic acid per 100 parts by weight of dry cement to retard the setting rate of the hydraulic cement slurry when emplaced in an environment having an elevated temperature of at least about 200* F.
Claim 6
Dependent Claim
67 words
A hydraulic cement composition comprising: a. a hydraulic cement slurry, and b. about 0.1 to about 10 parts by weight of an alkali or alkaline earth metal salt of a boron containing hydroxycarboxylic acid per 100 parts by weight of dry cement to retard the setting rate of the hydraulic cement slurry when emplaced in an environment having an elevated temperature of at least about 200* F.
Claim 7
Dependent Claim
21 words
The composition of claim 4 wherein the salt of the water soluble boron containing hydroxycarboxylic acid is an alkali metal salt.
Claim 8
Dependent Claim
22 words
The composition of claim 4 wherein the salt of the water soluble boron containing hydroxycarboxylic acid is an alkaline earth metal salt.
References Cited (Backward Citations)
US1510795A
Cited
US1852595A
Cited
US2211368A
Cited
US2705050A
Cited
US3053674A
Cited
US3100526A
Cited
US3234154A
Cited
US3433657A
Cited
US3748159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |