US2863832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of acidizing petroliferous formations
Assignee: California Research LLC
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Filing: 1954-05-14
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Granted: 1958-12-09
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Richard L Perrine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; Y; Y10; Y10S; Y10S507/00; Y10S507/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF INCREASING THE PRODUCTIVITY OF A SUBTERRANEAN FORMATION CONTAINING CONNATE WATER AND PENETRATED BY A WELL BORE COMPRISING THE STEPS OF INTRODUCING INTO SAID WELL BORE IN CONTACT WITH SAID FORMATION A LIQUID HYDROCARBON CONTAINING IN SOLUTION AN ORGANIC CARBOXYLIC ACID ANHYDRIDE CAPABLE OF FORMING AN ACID UPON REACTION WITH SAID CONNATE WATER AT FORMATION CONDITIONS, SAID ANHYDRIDE BEING PRESENT IN AN AMOUNT TO PRODUCE SUFFICIENT ACID TO INCREASE SUBSTANTIALLY THE PRODUCTIVITY OF THE SUBTERRANEAN FORMATION BY REACTION THEREWITH, AND CONTACTING THE SOLUTION WITH SAID CONNATE WATER TO RELEASE SAID ANHYDRIDE FROM SAID SOLUTION TO ACIDIZE SAID FORMATION.
Claim 2
Independent Claim
100 words
THE METHOD OF INCREASING THE PRODUCTIVITY OF A SUBTERRANEAN FORMATION CONTAINING CONNATE WATER AND PENETRATED BY A WELL BORE COMPRISING THE STEPS OF INTRODUCING INTO SAID WELL BORE IN CONTACT WITH SAID FORMATION A LIQUID HYDROCARBON CONTAINING IN SOLUTION AN ORGANIC CARBOXYLIC ACID ANHYDRIDE CAPABLE OF FORMING AN ACID UPON REACTION WITH SAID CONNATE WATER AT FORMATION CONDITIONS, SAID ANHYDRIDE BEING PRESENT IN AN AMOUNT TO PRODUCE SUFFICIENT ACID TO INCREASE SUBSTANTIALLY THE PRODUCTIVITY OF THE SUBTERRANEAN FORMATION BY REACTION THEREWITH, AND CONTACTING THE SOLUTION WITH SAID CONNATE WATER TO RELEASE SAID ANHYDRIDE FROM SAID SOLUTION TO ACIDIZE SAID FORMATION.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |