US2614634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low water-loss cement slurry and method of cementing
Assignee: Phillips Petroleum Co
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Filing: 1949-07-11
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Granted: 1952-10-21
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Expires: 1969-07-11
Abstract
No abstract record available.
Inventors
- 👤 Peggy J Lea
- 👤 Henry B Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:26
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/12; C04B24/24; C04B24/38; C04B24/383; C09; C09K; C09K8/00; C09K8/42; C09K8/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
THE PROCESS OF CEMENTING A WALL WHICH EXTENDS INTO A POROUS FORMATION WHICH COMPRISES PLACING A HYDRAULIC CEMENT AQUEOUS SLURRY HAVING A REDUCED WATER LOSS ADJACENT TO SAID POROUS FORMATION BY ADMIXING WITH HYDRAULIC CEMENT A MINOR PROPORTION EFFECTIVE TO REDUCE THE WATER LOSS OF SAID SLURRY OF AT LEAST ONE OF THE GROUP CONSISTING OF SUBSTITUTED ALKYL AMINE SALTS OF AN ACID CARBOXYALKYL CELLULOSE ETHER WHEREIN THE ALKYL GROUP OF SAID CARBOXYALKYL RADICAL CONSISTS OF FROM ONE TO THREE CARBON ATOMS AND SAID SALT IS SOLUBLE IN AN AQUEOUS SLURRY OF HYDRAULIC CEMENT AND WATER, INTERACTING THEREWITH SUFFICIENT WATER TO PRODUCE A FLUID SLURRY AND INTRODUCING SAID SLURRY INTO SAID WELL INTO CONTACT WITH SAID POROUS FORMATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |