US3583483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for using foam in wells
Assignee: Chevron USA Inc
•
Filing: 1969-07-09
•
Granted: 1971-06-08
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Expires: 1989-07-09
Abstract
Abstract A method of providing an improved foam having high lifting capability for use in wells by controlling the liquid volume/gas volume ratio of the foam to a value between 0.02 and 0.2.
Inventors
- 👤 Robert W Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/14; C; C09; C09K; C09K8/00; C09K8/52
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
The method of claim 1 where in liquid is an aqueous surfactant solution and the gas is selected form the group comprising air, nitrogen, natural gas and carbon dioxide.
Claim 2
Independent Claim
44 words
A method of improving the lifting force of foam in a well comprising generating an aqueous liquid/air foam and maintaining the liquid volume/air volume ratio of said foam between 0.02 and 0.2 while circulating such foam in at least a portion of a well.
Claim 3
Independent Claim
60 words
A method of improving the lifting capability of a foam in a well comprising determining the pressure in a portion of a well in which foam is to be injected and adjusting the liquid volume/gas volume ratio of said foam so that the foam has a liquid volume/gas volume ratio between 0.02 and 0.2 in said portion of said well.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |