Patent US4094795A successfully refreshed from Google Patents.
US4094795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polygalactomannan ether compositions
Assignee: Stein Hall and Co Inc
•
Filing: 1977-01-28
•
Granted: 1978-06-13
•
Expires: 1997-01-28
Abstract
Abstract This invention provides a novel dialkylacrylamide ether adduct of polygalactomannan gum composition. This invention further provides a novel hydraulic fluid composition adapted for fracturing of subterranean formations, which composition contains dialkylacrylamide ether adduct of polygalactomannan gum as a gelling agent.
Inventors
- 👤 Ronald N. DeMartino
- 👤 Anthony B. Conciatori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:04
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087; C08B37/0093; C08B37/0096; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/921; Y10S507/922
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A hydraulic well-treating fluid composition which comprises an aqueous solution containing N,N-dialkylacrylamide ether adduct of polygalactomannan gum as a gelling agent in an amount in the range between about 0.05 and 5 weight percent based on the weight of the water component, wherein each alkyl group contains between one and about four carbon atoms; and a breaker additive for reduction of solution viscosity.
Claim 2
Dependent Claim
63 words
A hydraulic well-treating fluid composition which comprises an aqueous solution containing N,N-dialkylacrylamide ether adduct of polygalactomannan gum as a gelling agent in an amount in the range between about 0.05 and 5 weight percent based on the weight of the water component, wherein each alkyl group contains between one and about four carbon atoms; and a breaker additive for reduction of solution viscosity.
Claim 3
Dependent Claim
79 words
A hydraulic well-fracturing fluid composition comprising (1) an aqueous medium, (2) N,N-dialkylacrylamide ether adduct of polygalactomannan gum as a gelling agent in an amount in the range between about 0.05 and 5 weight percent based on the weight of the water component wherein each alkyl group contains between one and about four carbon atoms, (3) a breaker additive for subsequent autonomous reduction of the gelling properties of the N,N-dialkylacrylamide ether adduct of polygalactomannan gum, and (4) a propping agent.
Claim 4
Dependent Claim
79 words
A hydraulic well-fracturing fluid composition comprising (1) an aqueous medium, (2) N,N-dialkylacrylamide ether adduct of polygalactomannan gum as a gelling agent in an amount in the range between about 0.05 and 5 weight percent based on the weight of the water component wherein each alkyl group contains between one and about four carbon atoms, (3) a breaker additive for subsequent autonomous reduction of the gelling properties of the N,N-dialkylacrylamide ether adduct of polygalactomannan gum, and (4) a propping agent.
Claim 5
Dependent Claim
21 words
A hydraulic well-fracturing fluid composition in accordance with claim 2 wherein the gelling agent is N,N-dimethylacrylamide ether adduct of guar gum.
Claim 6
Dependent Claim
22 words
A hydraulic well-fracturing fluid composition in accordance with claim 2 wherein the gelling agent is N,N-dimethylacrylamide ether adduct of locust bean gum.
Claim 7
Dependent Claim
17 words
A hydraulic well-fracturing fluid composition in accordance with claim 2 wherein the breaker additive is hemicellulase enzyme.
Claim 8
Dependent Claim
16 words
A hydraulic well-fracturing fluid composition in accordance with claim 2 wherein the propping agent is sand.
References Cited (Backward Citations)
US2801218A
Cited
US3346555A
Cited
US3483121A
Cited
US3615794A
Cited
US3912713A
Cited
US3960736A
Cited
US3922173A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |