US2674321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low water-loss cement slurry
Assignee: Phillips Petroleum Co
•
Filing: 1949-12-19
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Granted: 1954-04-06
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Expires: 1969-12-19
Abstract
No abstract record available.
Inventors
- 👤 Howard G Cutforth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:53
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/16; C04B24/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE PROCESS OF CEMENTING A WELL 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 FROM 0.1 PER CENT TO 5 PER CENT BY WEIGHT OF THE DRY CEMENT OF ONE OF THE GROUP CONSISTING OF ACID SULFOBENZYL LIGNIN ETHER, ACID SULFOBENZYL LIGNIN ETHERS IN WHICH AT LEAST ONE OF THE HYDROGEN ATOMS IN THE ALPHA CH2 GROUP HAVE BEEN REPLACED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL AND PROPYL RADICALS BUT IN WHICH THE ALKYLENE GROUP DOES NOT EXCEED FOUR CARBON ATOMS, AND SALTS OF SAID ETHERS, WHICH ARE SOLUBLE IN THE CEMENT SLURRY, INTERACTING THEREWITH SUFFICIENT WATER TO PRODUCE A FLUID SLURRY AND INTRODUCING SAID SLURRY INTO SAID WELL INTO CONTACT WITH SAID POROUS FORMATION.
Claim 2
Dependent Claim
141 words
THE PROCESS OF CEMENTING A WELL 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 FROM 0.1 PER CENT TO 5 PER CENT BY WEIGHT OF THE DRY CEMENT OF ONE OF THE GROUP CONSISTING OF ACID SULFOBENZYL LIGNIN ETHER, ACID SULFOBENZYL LIGNIN ETHERS IN WHICH AT LEAST ONE OF THE HYDROGEN ATOMS IN THE ALPHA CH2 GROUP HAVE BEEN REPLACED BY A RADICAL SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL AND PROPYL RADICALS BUT IN WHICH THE ALKYLENE GROUP DOES NOT EXCEED FOUR CARBON ATOMS, AND SALTS OF SAID ETHERS, WHICH ARE SOLUBLE IN THE CEMENT SLURRY, 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)
US2549507A
Cited
US2562148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |