Patent US3332480A successfully refreshed from Google Patents.
US3332480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrocarbons by thermal methods
Assignee: Pan American Petroleum Corp
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Filing: 1965-03-04
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Granted: 1967-07-25
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 David R Parrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:41
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
IN A METHOD FOR RECOVERING OIL FROM AN OIL-BEARING RESERVOIR HAVING A PLURALITY OF WELLS EXTENDING THEREINTO AND FORMING A PLURALITY OF SIMILAR WELL PATTERNS THEREIN, SOME OF WHICH ARE PRODUCING OIL AND SOME OF WHICH ARE IDLE, EACH OF SAID PATTERNS HVING A CENTRAL WELL, THE IMPROVEMENT WHICH COMPRISES INJECTING A DRIVING FLUID HAVING A MOBILITY GREATER THAN THE RECOVERED OIL INTO THE CENTRAL WELL IN EACH OF A PLURALITY OF PRODUCING WELL PATTERNS AND THEN INTO SAID RESERVOIR, EACH OF THE PERIMETER WELLS IN SAID PRODUCING PATTERNS SIMULTANEOUSLY SERVING AS A PERIMETER WELL FOR NOT MORE THAN ONE OTHER PRODUCING WELL PATTERN, RECOVERING OIL FROM SAID PERIMETER WELLS, THEREAFTER DISCONTINUING INJECTION OF SAID FLUID VIA THE CENTRAL WELL OF EACH OF SAID PRODUCING WELL PATTERNS, INJECTING A DRIVING FLUID HAVING A MOBILITY GREATER THAN THE RECOVERED OIL INTO THE CENTRAL WELL OF EACH OF THE PREVIOUSLY IDLE WELL PATTERNS AND THEN INTO SAID RESERVOIR, EACH OF THE PERIMETER WELLS IN THE LAST-MENTIONED WELL PATTERNS SIMULATENOUSLY SERVING AS A PERIMETER WELL FOR NOT MORE THAN ONE OTHER OF SAID LAST-MENTIONED WELL PATTERNS, AND RECOVERING OIL FROM THE PERIMETER WELLS IN SAID LAST-MENTIONED WELL PATTERN.
Claim 2
Dependent Claim
195 words
IN A METHOD FOR RECOVERING OIL FROM AN OIL-BEARING RESERVOIR HAVING A PLURALITY OF WELLS EXTENDING THEREINTO AND FORMING A PLURALITY OF SIMILAR WELL PATTERNS THEREIN, SOME OF WHICH ARE PRODUCING OIL AND SOME OF WHICH ARE IDLE, EACH OF SAID PATTERNS HVING A CENTRAL WELL, THE IMPROVEMENT WHICH COMPRISES INJECTING A DRIVING FLUID HAVING A MOBILITY GREATER THAN THE RECOVERED OIL INTO THE CENTRAL WELL IN EACH OF A PLURALITY OF PRODUCING WELL PATTERNS AND THEN INTO SAID RESERVOIR, EACH OF THE PERIMETER WELLS IN SAID PRODUCING PATTERNS SIMULTANEOUSLY SERVING AS A PERIMETER WELL FOR NOT MORE THAN ONE OTHER PRODUCING WELL PATTERN, RECOVERING OIL FROM SAID PERIMETER WELLS, THEREAFTER DISCONTINUING INJECTION OF SAID FLUID VIA THE CENTRAL WELL OF EACH OF SAID PRODUCING WELL PATTERNS, INJECTING A DRIVING FLUID HAVING A MOBILITY GREATER THAN THE RECOVERED OIL INTO THE CENTRAL WELL OF EACH OF THE PREVIOUSLY IDLE WELL PATTERNS AND THEN INTO SAID RESERVOIR, EACH OF THE PERIMETER WELLS IN THE LAST-MENTIONED WELL PATTERNS SIMULATENOUSLY SERVING AS A PERIMETER WELL FOR NOT MORE THAN ONE OTHER OF SAID LAST-MENTIONED WELL PATTERNS, AND RECOVERING OIL FROM THE PERIMETER WELLS IN SAID LAST-MENTIONED WELL PATTERN.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |