Patent US3959112A successfully refreshed from Google Patents.
Patent US3115931A successfully refreshed from Google Patents.
US3115931A
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Method of acidizing wells
Assignee: Shell USA Inc
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Filing: 1959-12-23
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Granted: 1963-12-31
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Expires: 1979-12-23
Abstract
No abstract record available.
Inventors
- 👤 James W Mcever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:28
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF TREATING AN INTERVAL OF AN OIL-PRODUCING FORMATION TRAVERSED BY A WELL TO IMPROVE THE PERMEABILITY OF SAID FORMATION INTERVAL, SAID METHOD COMPRISING PACKING OFF A LIMITED SECTION OF THE OIL-PRODUCING FORMATION OF THE WELL ABOVE AND BELOW THE INTERVAL TO BE TREATED, PUMPING A QUNATITY OF AICD INTO THE PACKED OFF SECTION OF THE WELL, SIMULTANEOUSLY PUMPING AN OELPHILIC FLUID INTO THE WELL ABOVE AND BELOW SAID PACKED OFF SECTION, AND FORMING A PERMEABLE COLLECTION ZONE AND FLOW AREA EXTENDING RADIALLY FROM SAID PACKED OFF PORTION OF THE WELL BY FOCUSING A QUNATITY OF ACID INTO SAID PACKED-OFF PORTION OF SAID OIL PRODUCING FORMATION, SAID ACID FOCUSING BEING ACCOMPLISHED BY SIMULTANEOUSLY INJECTING SAID
Claim 2
Independent Claim
116 words
THE METHOD OF TREATING AN INTERVAL OF AN OIL-PRODUCING FORMATION TRAVERSED BY A WELL TO IMPROVE THE PERMEABILITY OF SAID FORMATION INTERVAL, SAID METHOD COMPRISING PACKING OFF A LIMITED SECTION OF THE OIL-PRODUCING FORMATION OF THE WELL ABOVE AND BELOW THE INTERVAL TO BE TREATED, PUMPING A QUNATITY OF AICD INTO THE PACKED OFF SECTION OF THE WELL, SIMULTANEOUSLY PUMPING AN OELPHILIC FLUID INTO THE WELL ABOVE AND BELOW SAID PACKED OFF SECTION, AND FORMING A PERMEABLE COLLECTION ZONE AND FLOW AREA EXTENDING RADIALLY FROM SAID PACKED OFF PORTION OF THE WELL BY FOCUSING A QUNATITY OF ACID INTO SAID PACKED-OFF PORTION OF SAID OIL PRODUCING FORMATION, SAID ACID FOCUSING BEING ACCOMPLISHED BY SIMULTANEOUSLY INJECTING SAID
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |