US3776312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well bottom treatment
Assignee: KOOLAJ ES GAZIPARI TERVEZO VALLALAT HU
•
Filing: 1971-10-28
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Granted: 1973-12-04
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Expires: 1991-10-28
Abstract
Abstract Microcracks are formed in the environs of deep drilled wells, such as oil wells, by heating and then cooling the adjacent strata. This can be accomplished by introducing ammonia into the stratum water at the bottom of the well. The resulting heat of dissolution will slightly heat the strata adjacent to the bottom of the well as the ammonia will chemically assist the displacement of recoverable materials lodged in these strata. The cooling to the initial temperature of the bottom can be accomplished by the presence of additional stratum water in the well.
Inventors
- 👤 A Ban
- 👤 S Nagy
- 👤 V Balint
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:46
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
The improvement in the process of claim 1, wherein gaseous ammonia is injected into the water in the vicinity of the well bottom.
Claim 2
Dependent Claim
43 words
The improvement in the process of claim 2, wherein the amount of the injected ammonia is such that the resulting aqueous solution thereof will have a specific gravity approximating that of the hydrocarbons in said strata under the given temperature and pressure conditions.
References Cited (Backward Citations)
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US2776714A
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US2813583A
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US3138204A
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US3101781A
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US3333632A
Cited
US3303878A
Cited
US3384177A
Cited
US3392782A
Cited
US3464492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |