US3754561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam circulation fluids
Assignee: Chevron USA Inc
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Filing: 1972-02-04
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Granted: 1973-08-28
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Expires: 1992-02-04
Abstract
Abstract Detergent-range olefin sulfonates containing a minor amount of C9-C15 substantially linear primary alcohols yield aqueous gasin-liquid foams having exceptionally low resistance to flow. These foams are especially effective circulation fluids in oil wells when for each 100 parts of the sulfonate from 10 to 25 parts of the alcohol is present in the foaming agent mixture.
Inventors
- 👤 S Sharman
- 👤 R House
- 👤 G Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; E; E21; E21B; E21B21/00; E21B21/14; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
The method as in claim 1 further characterized in that said relative amount of said alcohol is in the range from about 10 to 35 parts.
Claim 2
Dependent Claim
46 words
The method as in claim 2 further characterized in that said alcohol is selected from the group consisting of C10 to C13, inclusive, n-alkanols and mixtures thereof, and wherein said olefinic hydrocarbon is selected from the group consisting of terminal alkenes, internal alkenes, and mixtures thereof.
Claim 3
Dependent Claim
51 words
The method as in claim 1 further characterized in that said alcohol is 1-dodecanol, in that said sulfonate is obtained by the use of an n-alkene, and in that in parts by weight for each 100 parts of the sulfonate from about 10 to 25 parts of the alcohol is added.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |