Patent US3583489A successfully refreshed from Google Patents.
US3583489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cleaning method using foam containing abrasives
Assignee: Chevron USA Inc
•
Filing: 1969-07-01
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Granted: 1971-06-08
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Expires: 1989-07-01
Abstract
Abstract A method of cleaning a well liner by contacting the well liner with a gas-liquid foam having entrained therein a quantity of abrasive particles so as to remove scale and other undesirable material from such liner.
Inventors
- 👤 Stanley O Hutchison
- 👤 John C Mckinnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:22
CPC Classifications
E; E21; E21B; E21B37/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
A method of claim 1 further characterized in that the abrading particles are sand having a diameter of less than one-eighth of an inch.
Claim 2
Dependent Claim
30 words
The method of claim 1 fUrther characterized in that the foam containing said particles is circulated past said well liner at a velocity of at least 25 feet per minute.
Claim 3
Dependent Claim
28 words
The method of claim 1 further characterized in that at least a portion of the foam containing said particles is jetted against the liner at substantially right angles.
Claim 4
Dependent Claim
23 words
The method of claim 1 further characterized in that at least a portion of said foam is directed through slots of the liner.
Claim 5
Dependent Claim
24 words
A method according to claim 1 wherein from one-half to 6 pounds of sand per gallon of foam solution is added to said foam.
References Cited (Backward Citations)
US3273643A
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US2669809A
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US3111178A
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US3130798A
Cited
US3155178A
Cited
US3082073A
Cited
US3272650A
Cited
US3463231A
Cited
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 |