Patent US4394273A successfully refreshed from Google Patents.
US4394273A
Expired / Lapsed
US
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Defoamers for aqueous liquids containing soluble zinc salts
Assignee: Baroid Technology Inc
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Filing: 1981-12-10
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Granted: 1983-07-19
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Expires: 2001-12-10
Abstract
Abstract 2,6,8-Trimethyl-4-nonanone and the triethoxylated derivative of 2,6,8-Trimethyl-4-nonanol synergistically combine to reduce the foaming of heavy brines containing zinc bromide and one or more soluble salts from the group calcium chloride and calcium bromide.
Inventors
- 👤 Michael H. Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/06; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; B01D19/0404; Y; Y10; Y10S; Y10S507/00; Y10S507/925; Y10S507/926
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
A defoaming composition comprising a mixture of 2,6,8-trimethyl-4-nonanone and the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol wherein the volume ratio of 2,6,8-trimethyl-4-nonanone to the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol is in the range from about 9:1 to about 1:9.
Claim 2
Dependent Claim
36 words
A defoaming composition comprising a mixture of 2,6,8-trimethyl-4-nonanone and the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol wherein the volume ratio of 2,6,8-trimethyl-4-nonanone to the triethoxylated derivative of 2,6,8-trimethyl-4-nonanol is in the range from about 9:1 to about 1:9.
Claim 3
Dependent Claim
19 words
The composition of claim 1 wherein said volume ratio is in the range from about 7:1 to about 1:7.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein said volume ratio is in the range from about 5:1 to about 1:5.
Claim 5
Dependent Claim
33 words
A method of decreasing the foam which forms on mixing an aqueous brine containing a soluble zinc salt which comprises mixing with the brine the defoaming composition of claim 1, 2, or 3.
Claim 6
Dependent Claim
32 words
A method of decreasing the foam which forms on mixing an aqueous brine containing zinc bromide which comprises mixing with the brine the defoaming composition of claim 1, 2, or 3 .
Claim 7
Dependent Claim
52 words
A method of decreasing the foam which forms on mixing a heavy brine having a density greater than about 14.2 pounds per gallon containing at least 20% by weight zinc bromide with a composition containing hydroxyethyl cellulose which comprises mixing with the brine the defoaming composition of claim 1, 2, or 3.
Claim 8
Dependent Claim
31 words
A heavy brine well servicing fluid which comprises an aqueous solution having a density greater than about 14.2 pounds per gallon and the defoaming composition of claim 1, 2, or 3.
Claim 9
Dependent Claim
57 words
A heavy brine well servicing fluid which comprises an aqueous solution having a density greater than about 14.2 pounds per gallon, from about 1 to about 5 pounds per 42 gallon barrel of hydroxyethyl cellulose, and from about 0.01 to about 5.0 milliliters per 42 gallon barrel of the defoaming composition of claim 1, 2, or 3.
Claim 10
Dependent Claim
57 words
A heavy brine well servicing fluid which comprises an aqueous solution having a density greater than about 14.2 pounds per gallon, from about 1 to about 5 pounds per 42 gallon barrel of hydroxyethyl cellulose, and from about 0.05 to about 0.5 milliliters per 42 gallon barrel of the defoaming composition of claim 1, 2, or 3.
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |