Patent US4169798A successfully refreshed from Google Patents.
US4169798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well-treating compositions
Assignee: Stein Hall and Co Inc
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Filing: 1977-10-25
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Granted: 1979-10-02
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Expires: 1997-10-25
Abstract
Abstract This invention provides a novel hydraulic fluid composition adapted for fracturing of subterranean formations, which comprises (1) an aqueous medium, (2) methyl ether of polygalactomannan gum as a gelling agent, and (3) a breaker additive for subsequent reduction of fluid viscosity.
Inventors
- 👤 Ronald N. DeMartino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:20
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/924
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A hydraulic well-treating fluid composition which comprises an aqueous solution containing methyl ether of polygalactomannan gum as a gelling agent, and a breaker additive for reduction of solution viscosity, wherein the methyl ether of polygalactomannan gum has a degree of substitution between about 0.1 and 1.5.
Claim 2
Dependent Claim
46 words
A hydraulic well-treating fluid composition which comprises an aqueous solution containing methyl ether of polygalactomannan gum as a gelling agent, and a breaker additive for reduction of solution viscosity, wherein the methyl ether of polygalactomannan gum has a degree of substitution between about 0.1 and 1.5.
Claim 3
Dependent Claim
32 words
A composition in accordance with claim 1 wherein the methyl ether of polygalactomannan gum is present in a quantity between about 0.05 and 5 weight percent, based on the weight of water.
Claim 4
Dependent Claim
20 words
A composition in accordance with claim 1 wherein the methyl ether of polygalactomannan gum is methyl ether of guar gum.
Claim 5
Dependent Claim
21 words
A composition in accordance with claim 1 wherein the methyl ether of polygalactomannan gum is methyl ether of locust bean gum.
Claim 6
Dependent Claim
54 words
A hydraulic well-fracturing fluid composition comprising (1) an aqueous medium, (2) methyl ether of polygalactomannan gum as a gelling agent, having a degree of substitution between about 0.1 and 1.5, (3) a breaker additive for subsequent autonomous reduction of the gelling properties of the methyl ether of glactomannan gum and (4) a propping agent.
Claim 7
Dependent Claim
54 words
A hydraulic well-fracturing fluid composition comprising (1) an aqueous medium, (2) methyl ether of polygalactomannan gum as a gelling agent, having a degree of substitution between about 0.1 and 1.5, (3) a breaker additive for subsequent autonomous reduction of the gelling properties of the methyl ether of glactomannan gum and (4) a propping agent.
Claim 8
Dependent Claim
20 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the gelling agent is methyl ether of guar gum.
Claim 9
Dependent Claim
21 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the gelling agent is methyl ether of locust bean gum.
Claim 10
Dependent Claim
17 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the breaker additive is an enzyme.
Claim 11
Dependent Claim
20 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the breaker additive is an acid or ester compound.
Claim 12
Dependent Claim
18 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the breaker additive is an oxidizing compound.
Claim 13
Dependent Claim
16 words
A hydraulic well-fracturing fluid composition in accordance with claim 5 wherein the propping agent is sand.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |