Patent US3671427A successfully refreshed from Google Patents.
US3671427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignite products and compositions thereof
Assignee: Baroid Technology Inc
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Filing: 1970-01-15
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Granted: 1972-06-20
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Expires: 1990-01-15
Abstract
Abstract Reaction products of humic acid with long-chain fatty acyl partial amides of a polyalkylene polyamine, such as the reaction product obtained using tall oil fatty acids and tetraethylene pentamine, the salt linkage being optionally, partially or largely converted to amide linkage by heat treatment. The humic acid optionally may be in part reacted with a long-chain alkyl ammonium cation. The novel products are useful in compounding oil base well-working fluids; as corrosion inhibitors; and for other uses.
Inventors
- 👤 Robert S Andrews Jr
- 👤 William C Mcdaniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:45
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91; Y10S507/922; Y10S507/926
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A composition of matter in accordance with claim 1 in which said partial amide is linked to said humic acid by both salt linkages and amide linkages.
Claim 2
Dependent Claim
98 words
An oil base well-working fluid consisting essentially of a major proportion of oil and a minor proportion but sufficient to substantially lower the filter loss of an adduct of humic acid and a fatty acyl partial amide of a polyalkylene polyamine having from between three and seven nitrogen atoms and wherein said partial amide has fatty acyl to the extent of between one and all but one of said nitrogen atoms and wherein said fatty acyl has from 12 to 22 carbon atoms and wherein said partial amide is linked to said humic acid by an amide linkage.
Claim 3
Dependent Claim
33 words
A fluid in accordance with claim 3 in which a dispersing additive is present in an amount effective to expedite dispersion of said adduct but an amount less than that of said adduct.
Claim 4
Dependent Claim
27 words
An oil base well-working fluid in accordance with claim 3 in which partial amide is linked to said humic acid by both salt linkages and amIde linkages.
Claim 5
Dependent Claim
33 words
A fluid in accordance with claim 5 in which a dispersing additive is present in an amount effective to expedite dispersion of said adduct but an amount less than that of said adduct.
Claim 6
Dependent Claim
121 words
In a process for drilling a well wherein there is circulated in the well an oil-base drilling fluid subject to filtration into permeable formations penetrated by the well, the method of maintaining said filtration at a selected low value during said drilling which comprises admixing with said drilling fluid an adduct of humic acid and a fatty acyl partial amide of a polyalkylene polyamine having from between three and seven nitrogen atoms and wherein said partial amide has fatty acyl to the extent of between one and all but one of said nitrogen atoms and wherein said fatty acyl has from 12 to 22 carbon atoms and wherein said partial amide is linked to said humic acid by an amide linkage.
Claim 7
Dependent Claim
25 words
A process in accordance with claim 7 in which said partial amide is linked to said humic acid by both salt linkages and amide linkages.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |