US3254718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acidizing subterranean formations
Assignee: ExxonMobil Oil Corp
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Filing: 1963-05-15
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Granted: 1966-06-07
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Expires: 1983-05-15
Abstract
No abstract record available.
Inventors
- 👤 Peggy M Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:59
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN THE PROCESS OF ACIDIZING A SUBTERRANEAN CALCAREOUS FORMATION CONTAINING PETROLEUM TO INCREASE THE RATE OF FLOW OF PETROLEUM THEREFROM WHEREIN AN AQUEOUS SOLUTION OF AN ACID IS PASSED INTO A HEAT A PORTION OF SAID FORMATION, THE IMPROVEMENT COMPRISING PASSING INTO SAID PORTION OF SAID FORMATION IMMEDIATELY PRIOR TO SAID AQUEOUS SOLUTION OF AN ACID AN AMPHIPATHIC SOLVENT, WHEREBY SAID PETROLEUM AND ANY WATER CONTAINED IN SAID PORTION OF SAID FORMATION IS REPLACED BY SAID AMPHIPATHIC SOLVENT AND THE PERMEABILITY OF SAID PORTION OF SAID FORMATION TO SAID AQUEOUS SOLUTION OF AN ACID AND THE ABILITY OF SAID AQUEOUS SOLUTION OF ACID TO CONTACT THE WALLS OF THE INTERSTICES OF SAID PORTION OF SID FORMATION IS INCREASED.
Claim 2
Dependent Claim
118 words
IN THE PROCESS OF ACIDIZING A SUBTERRANEAN CALCAREOUS FORMATION CONTAINING PETROLEUM TO INCREASE THE RATE OF FLOW OF PETROLEUM THEREFROM WHEREIN AN AQUEOUS SOLUTION OF AN ACID IS PASSED INTO A HEAT A PORTION OF SAID FORMATION, THE IMPROVEMENT COMPRISING PASSING INTO SAID PORTION OF SAID FORMATION IMMEDIATELY PRIOR TO SAID AQUEOUS SOLUTION OF AN ACID AN AMPHIPATHIC SOLVENT, WHEREBY SAID PETROLEUM AND ANY WATER CONTAINED IN SAID PORTION OF SAID FORMATION IS REPLACED BY SAID AMPHIPATHIC SOLVENT AND THE PERMEABILITY OF SAID PORTION OF SAID FORMATION TO SAID AQUEOUS SOLUTION OF AN ACID AND THE ABILITY OF SAID AQUEOUS SOLUTION OF ACID TO CONTACT THE WALLS OF THE INTERSTICES OF SAID PORTION OF SID FORMATION IS INCREASED.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |