Patent US3174546A successfully refreshed from Google Patents.
US3174546A
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Method for selectively sealing-off formations
Assignee: Pan American Petroleum Corp
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Filing: 1962-08-29
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Granted: 1965-03-23
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Expires: 1982-08-29
Abstract
No abstract record available.
Inventors
- 👤 Don H Flickinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:56
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/261; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
IN A METHOD FOR DIRECTING A FLUID INTO ONE OF AT LEAST TWO ZONES OF A GEOLOGICAL FORMATION PENETRATED BY A CASED WELL HAVING PERFORATIONS THEREIN OPPOSITE SAID ZONES; THE IMPROVEMENT WHICH COMPRISES INJECTING INTO SAID WELL SUFFICIENT SEALER ELEMENTS SLIGHTLY LARGER IN SIZE THAN SAID PERFORATIONS, DIRECTING SAID ELEMENTS TO ALL OF SAID PERFORATIONS AND HOLDING THEM THERE BY MEANS OF FLUID PRESSURE; REMOVING SAID ELEMENTS ONLY FROM THE PERFORATIONS OPPOSITE A GIVEN ZONE; INJECTING SAID FLUID INTO SAID GIVEN ZONE VIA THE RESULTING UNSEALED PERFORATIONS, THEREAFTER RESEALING THE LASTMENTIONED PERFORATIONS BY INJECTING AN ADDITIONAL QUANTITY OF SAID SEALER ELEMENTS SUFFICIENT IN NUMBER TO COVER SAID LAST-MENTIONED PERFORATIONS; DIRECTING SAID ELEMENTS TO ALL OF SAID PERFORATIONS OPPOSITE SAID GIVEN ZONE AND HOLDING THEM THERE BY MEANS OF FLUID PRESSURE; REMOVING SAID ELEMENTS ONLY FROM THE PERFORATIONS OPPOSITE A ZONE OTHER THAN THE ONE INTO WHICH SAID FLUID WAS INJECTED; AND INJECTING SAID FLUID INTO SAID LAST-MENTIONED ZONE VIA THE RESULTING UNSEALED PERFORATIONS.
Claim 2
Dependent Claim
163 words
IN A METHOD FOR DIRECTING A FLUID INTO ONE OF AT LEAST TWO ZONES OF A GEOLOGICAL FORMATION PENETRATED BY A CASED WELL HAVING PERFORATIONS THEREIN OPPOSITE SAID ZONES; THE IMPROVEMENT WHICH COMPRISES INJECTING INTO SAID WELL SUFFICIENT SEALER ELEMENTS SLIGHTLY LARGER IN SIZE THAN SAID PERFORATIONS, DIRECTING SAID ELEMENTS TO ALL OF SAID PERFORATIONS AND HOLDING THEM THERE BY MEANS OF FLUID PRESSURE; REMOVING SAID ELEMENTS ONLY FROM THE PERFORATIONS OPPOSITE A GIVEN ZONE; INJECTING SAID FLUID INTO SAID GIVEN ZONE VIA THE RESULTING UNSEALED PERFORATIONS, THEREAFTER RESEALING THE LASTMENTIONED PERFORATIONS BY INJECTING AN ADDITIONAL QUANTITY OF SAID SEALER ELEMENTS SUFFICIENT IN NUMBER TO COVER SAID LAST-MENTIONED PERFORATIONS; DIRECTING SAID ELEMENTS TO ALL OF SAID PERFORATIONS OPPOSITE SAID GIVEN ZONE AND HOLDING THEM THERE BY MEANS OF FLUID PRESSURE; REMOVING SAID ELEMENTS ONLY FROM THE PERFORATIONS OPPOSITE A ZONE OTHER THAN THE ONE INTO WHICH SAID FLUID WAS INJECTED; AND INJECTING SAID FLUID INTO SAID LAST-MENTIONED ZONE VIA THE RESULTING UNSEALED PERFORATIONS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |